KR101882463B1 - Rudder for ships, having a rudder-monitoring device - Google Patents

Abstract

The present invention relates to a marine rudder having a third blades to be arranged on the hull so as to be rotatable about the rotation axis, and another stock for applying torque to the third blades. And the other monitoring device 3 is provided with the other blade 22 or the other stock 22 to pick up the measurement signal from the other blade 22 or the other stock 21, (33) connected to one or more of said sensors (33) for evaluating and / or communicating a measurement signal picked up by one or more of said sensors (33) and one or more sensors (33) 22). ≪ / RTI > In this way, a marine craft is provided which, in operation of the vessel, allows for other operability and other mechanical completeness to be monitored in all necessary situations, for example in the sea, in a simple manner.

Description

{RUDDER FOR SHIPS, HAVING A RUDDER-MONITORING DEVICE WITH OTHER MONITORING DEVICES}

The present invention relates to a marine rudder including a third blade that is to be disposed on the hull so as to be rotatable around the rotation axis, and another stock for applying torque to the third blade.

Such a rider, generally located at the stern of the ship and acting to steer the vessel, includes a third blade disposed on the hull so as to be rotatable about the rotational axis, and another stock for applying torque to the third blade. The other stock acts to connect the other blade to the hull and can be rotated to position the rudder by pivoting the other blade about the rotational axis.

During operation, i. E. During the voyage of the ship, the ship is exposed to a large load which exerts a load on the other blades, thrusters, bearings and joints in the form of rudder, transverse rudder force, other longitudinal force and vibration. Thus, the rider must be checked at regular intervals, in particular to ensure rudimentary mechanical and structural integrity and operability.

Currently, other such inspections take place while the vessel is in the dock and therefore the boat is freely accessible. It is also possible to conduct an underwater inspection (so-called IW check) by a diver when the vessel is in water, at which time only external inspection of other systems is normally possible.

DE 20 2005 019 626 U1 discloses a device for checking and measuring the neck bearing clearance between other outer bearings and the other stock in a rudder which allows for underwater inspection of the neck bearing clearance by the diver Let's do it. For this purpose, a measuring bar is provided, which is introduced into the gap between the outer bearing of the other stock and the inner bearing with the measuring probe, in order to carry out the gap width measurement.

It is not possible to obtain information on the other conditions, especially the structural integrity and operability of others, during the operation of the ship, for example, while navigating in the sea, in the known rudder. It is therefore generally not possible for a crew member on a ship's bridge to check and monitor for other possible malfunctions or damage at sea.

For example, as is known from DE 101 64 701 A1, there is a method and means for an auxiliary system for maneuvering a ship. However, such ancillary systems assist the crew in predicting maneuvering by considering the ship's current steering characteristics and circumstances, taking into account (external) disturbances to support maneuvering, and in determining control of the craft. Monitoring of other mechanical completeness is not provided in such an auxiliary system.

It is an object of the present invention to provide a marine rudder which, in operation of a ship, can be monitored in a simple manner, for example, even in sea, for other operational and mechanical completeness in all necessary situations.

This object is solved by the features of claim 1.

Accordingly, the marine rudder is provided with a monitoring device, and the monitoring device includes at least one sensor disposed on the other blade or the other stock for picking up a measurement signal from the other blade or the other stock, And one or more calculation units connected to one or more of the sensors and arranged on the other blade for evaluating and / or communicating the measurement signal picked up by the sensor.

The rattler according to the present invention, equipped with other monitoring devices, offers the possibility of constantly monitoring the rudder against other mechanical completeness and other operability, in order to obtain feedback immediately upon malfunction of the rudder. Also, in other operations, data can be collected by recording the sensor signal to better plan the necessary maintenance work and to obtain information about the load acting on the rudder during the operation period. For this purpose, one or more sensors are arranged in the other blades and / or other stocks in relation to the other monitoring device, and the sensor acts to pick up and measure an important measured quantity in the other blade or other stock. Through the corresponding line, the sensor is connected to a calculation unit arranged in the other blade or on the other blade, and the calculation unit compares the measured signal to the picked-up image in a suitable manner, for example to the ship's bridge, Detect, process, and possibly store the measured measurement signal.

In relation to other monitoring devices, such measured quantities, particularly indicative of other possible malfunctions, may be detected locally by a calculation unit located in the other blade or on the other blade to be picked up, evaluated and possibly delivered to alert Lt; / RTI >

Measurements and checks that have been performed conventionally can be made by other monitoring devices, in particular in connection with so-called IW checks (other underwater inspection of ships placed in water by divers). For this purpose,

The first sensor is arranged in the bearing for supporting the other stock against the hull to measure the clearance in the bearing, and / or

A second sensor is arranged in the bearing for supporting the other stock against the hull to monitor the position of the bearing or part of the bearing and /

The third sensor is disposed at a connection point between the other stock and the other blade to monitor the connection between the other stock and the other blade.

With the first sensor, a so-called neck bearing clearance of another stock, which indicates the degree of abrasion of the bearing of the other stock in the other trunk or hull, can be measured. With the second sensor, the position (rotation or movement) of the bearing or the bearing bush of the bearing, and thus the operability of the bearing, is monitored. By means of the third sensor, the secure connection of the tooth and the blade is monitored and, for this purpose, the sensor can automatically detect the rotation or release of the nut, for example, Locking nut. The checking and monitoring of these important measured characteristic quantities in a conventional manner is performed in connection with the IW check and can be supported by or even fully implemented by having a sensor associated with the other monitoring device so that the IW The check can be omitted and significant cost savings for the shipowner in this way.

The calculation unit in the other blade can be formed as a complete calculation and evaluation unit that receives, processes and stores measurement signals and delivers the measurement signals to the processed state. However, it also merely prepares the measurement signal to receive the picked-up measurement signal and deliver it without expensive additional processing and evaluation, for example, for transferring the measurement signal to an additional calculation unit on board for comprehensive evaluation, It is also conceivable to form the calculation unit on the other blade as a pre-processing unit with low performance in the form of a microcomputer in the form of an integrated electronic circuit.

One or more of the sensors disposed on the other blade or other stock may be formed as an acceleration sensor, a stress gauge, or a contact sensor, burst wire, pressure sensor, humidity sensor, or current measurement sensor, for example, . In this regard, it is contemplated that all such sensors are particularly suitable for detecting information about proper operating conditions at all other points where an indication of possible malfunction, damage or wear can be obtained.

It is also possible for one or more sensors to pick up the pinmount of the pin arranged on the other blade for monitoring the load of the pin.

Also preferably, the at least one sensor monitors the wear limit of the bearing of the other stock or the wear limit of the pin bearing. So far this is also part of the IW check. In this regard, the monitoring device according to the present invention may possibly replace the IW check, or at least supplement the IW check for increased monitoring safety.

The one or more sensors may also measure the current consumption of the other machine and / or the pressure in the hydraulic power transmission system to pick up vibrations of the other blades and / or other stock and / or to operate the other stock. By one or more sensors, the tightness in the other trunk for supporting the connection of the other and / or other blades can also be monitored. Preferably, a plurality of sensors are used here in combination, for example, an acceleration sensor, a stress gauge, a contact sensor, a rupture wire, a pressure sensor, a humidity sensor and / or a current measurement sensor, And appropriately picks up the necessary measurement signals associated with the quantity of the blades and / or other stock for this purpose.

For example, the acceleration sensor may be disposed inside the other blade or at a point on the other blade or a point on the other stock which is severely exposed to vibration during other operations. To detect vibration or movement, an inductive operation sensor may also be used. Sensors for monitoring and measuring pin movement can be disposed, for example, in a manner appropriate to the joint points of the pins or to the coupling devices coupling the pins and the other blades. The connection between the other blade and the tack stock may include, for example, a contact sensor disposed at the connection point between the other stock and the other blade, for example, between the soft iron connection piece (so called tie pin) on the other blade and the stock portion of the other stock ≪ / RTI > In such a sensor, the sensor is placed at every point where an important measured amount is to be detected and monitored.

The sensor may be configured to pick up one or more measurement signals at predetermined time intervals or in a time-sequential manner. When the measurement signal is picked up at a predetermined time interval, for example, other states can be reported at regular time intervals and, for example, other states can be displayed on the ship's bridge. When there is a malfunction, corresponding information can be displayed or an alarm can be generated. It is also possible to operate by means of a measured quantity of time-series continuous measurement and to gradually and permanently set certain key variables so that the corresponding information can be displayed immediately or possibly alerts and alarmed when a damage or malfunction occurs or when a predetermined wear limit is reached As shown in FIG.

The measurement signal can be stored so that, during operation of the ship, other modes of operation can also be documented and later read, or the recorded information can be used, for example, to plan maintenance operations.

In order to realize the monitoring device, a calculation unit for receiving a measurement signal from one or more sensors, causing the measurement signal to be (first) processed, and delivering the measurement signal in an appropriate manner is placed on the other blade. Such a calculation unit is preferably arranged in a space to be watertightly closed at the other blade, and protected against moisture during operation. Such a space to be watertightly closed may be provided in the interior of the other blade, for example in the area of the other upper edge, and closed against the outside by a closable lid which may be opened for access to the computing unit. As described above, the calculation unit can be formed as a complete calculation unit having a range of performance of a conventional PC, but may also be realized as a microcomputer due to an integrated component in chip form.

To supply energy to the computing unit, the computing unit may be coupled to a power supply unit disposed on the other blade. The power supply unit may be formed, for example, as a battery. Alternatively or additionally, the power supply unit may also be formed as a generator, such as a turbine, operatively connected to a passage in the other blade so that the water travels to generate electrical energy. The use of such generators has the advantage that the calculation unit is self-sufficient in operation and that the required energy is automatically generated without requiring external energy supply when the vessel is navigating.

When the generator and the battery are used in combination, the generator can charge the battery at the time of sailing, and the anchoring time of the ship can be filled by the energy stored in the battery.

It is also conceivable, however, to supply to the calculation unit via a cable for energy supply, the cable being connected to the calculation unit at the other blade from the power supply unit arranged in the hull and the hull, .

The calculation unit in the other blade detects the measurement signal picked up by the one or more sensors, causes it to be processed first, and acts to deliver it for further processing. For this purpose, the calculation unit may be connected to the receiving and evaluating unit in the form of an additional calculating unit, for example via a data line, and the receiving and evaluating unit may be arranged outside the other blade, for example in the hull, Performs an evaluation of the signal, and displays the measurement signal in a manner appropriate to the ship's bridge, for example. A data line formed as a cable is formed to be at least partially flexible, for example, to extend freely between the other blade and the hull and, for this purpose, to compensate for movement of the other blade relative to the hull. In this connection it is also conceivable to guide the data line in the other trunk, outside the trunk, in the other trunk, or in the other trunk, for example from the other blades towards the hull in order to achieve certain guidance of the data line towards the hull .

In another aspect, the computing unit may also be provided with a transmitting station having an antenna, which is formed for wirelessly transmitting data to a receiving and evaluating unit disposed outside of the other blade. The receiving and evaluating unit is also provided with a receiving station having an antenna for wireless reception of data emitted by a computing unit at the other blade. The advantage of this wireless data transmission is that the line connection between the other blade and the hull can be omitted. Here, the transmission path between the other blade and the hull, for example between the upper edge of the other blade and the part of the hull toward the other blade, ensures that data transmission is carried out at any time with sufficient reliability and accuracy in all situations At least partly in the water, so that the

The idea of the present invention will be described in detail below with reference to exemplary embodiments shown in the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of another with an other stock in a hull of a ship and other blades, including a plurality of sensors and calculation units of another monitoring device connected to a battery type power supply unit. Fig.
Fig. 2 shows the rudder of Fig. 1, in which the calculation unit is connected to a power supply unit in the form of a generator.
Fig. 3 (a) is a detailed view of a calculation unit arranged on the other blade, which is connected via a data line to a receiving and evaluating unit disposed in the hull; Fig.
Fig. 3 (b) is a detailed view of a calculation unit disposed on the other blade, which is connected in a wireless manner to a receiving and evaluating unit disposed in the hull.

1 shows a rudder 2 with a rudder blade 22 and the other rudder blade 22 is connected to the hull 1 via a rudderstock 21 and to the rudder stock 2, Can be pivoted about the rotation axis (D) on which the arm (21) extends. In the hull 1, the trunk tube 20 is arranged in the form of a tube projecting vertically downward from the hull 1, extending into the recess in the other blade 22 and accommodating the other stock 21 therein , Acts to mount the other blades 22 to the hull 1 in a manner known per se.

1, the pin 220 is articulatedly connected to the rear edge of the other blade 22 (as viewed in the direction of forward voyage of the ship) pivotable about a second rotational axis D2 , And is mounted to the other blade (22) through the pin bearing (225). Through coupling device 226 the pin 220 is rotated about the second rotational axis D2 in a manner known per se to increase the other effects of the pin 220 when pivoting the other blade 22. [ Is connected to the trunk tube (20) so as to be inclined automatically against the other blade (22).

Is axially supported on the hull 1 via the upper support bearing 210 and radially mounted on the trunk tube through the neck bearing 214. [ The upper support bearing 210 serves to axially support the other stock 21 and holds the other blade 22 in the axial direction of the other stock 21 on the hull 1.

The other stock 21 is connected to the other blade 22 through the connection of the hydraulic coupling type and the conical stock portion 213 at the lower end of the other stock 21 is connected to the other blade 22 Is pressed into the connecting piece through a nut 212 which is disposed in a piece 221 (also called a hinge pin) and which is screwed to the threaded end 211 at the end of the other stock 21. Due to the crimp connection, the other stock 21 is non-rotatably connected with the other blade 22 so that a large torque can also be introduced into the other blade 22 by rotating the other stock 21. [

The other machine 215 is disposed at the upper end of the other stock 21 and the other machine rotates the other stock 21 around the rotation axis D to operate the other stock 21, And is shown only schematically in FIG. The other machine 215 can generate a force effect, for example, hydraulically.

It should be noted that the embodiment of the other (2) shown in Fig. 1 should be understood as an example only. In principle, the present invention can be applied to any type of rudder, for example, a full rudder rudder, an anti-rudder rudder, and all other types of rudder.

In view of the present invention, the sensor 33 is disposed on the other blade 22 and the other stock 21 of the rudder 2 shown in Fig. 1, and other components of the rudder 2, 2) can be monitored. Via the signal line 34 the sensor 33 is connected to the calculation unit 31 of the other monitoring device 3 and the other monitoring device is located at the other blade 22 and is picked up by the sensor 33 Detects and stores the measurement signal, and causes the measurement signal to be first processed and transferred to the on-line calculation unit for further processing.

Along with the power supply unit 32, the calculation unit 31 is disposed in the space 222, which must be watertightly closed at the upper front portion of the other blade 22. Outside, the space 222 is sealed for moisture protection and includes an opening 223 that can be closed wet-milled by the lid 224 and through the opening into the computing unit 31 And the power supply unit 32 can be accessed for assembly or maintenance.

The space 222 to be closed by the watertightness is located in a place in the other blade 22 which has not been used conventionally so that the calculation unit 31 and the power supply unit 32 of the monitoring device 3, As shown in FIG.

In the exemplary embodiment shown in Fig. 1, the power supply unit 32 is formed as a battery capable of being recharged, for example, with sufficient capacity to supply it to the calculation unit 31 over a long period of time.

In another or additional configuration, as shown in FIG. 2, the power supply unit 32 may include a generator disposed in the passageway 227 in the manner of a turbine. Here, the passage 227 includes an inlet opening 228 at the front edge of the other blade 22, and water flows along the rudder 2 during the forward voyage of the ship to drive the generator to generate electricity . Here, the passage 227 is designed to guide the water flowing through the passage through the generator, and the water exits the other blade 22 at an appropriate point without damaging the wetness of the space 222.

With regard to the power supply unit 32, a battery and a generator can also be used in combination, and the generator charges the battery by a corresponding flow through the passage 227 during voyage of the ship, (For example, anchorage time of a ship).

In this regard, it is also possible to provide the hull 1 in place of the power supply unit 32 in the other blade 22, for example, in the other stock 21 or in another stock, or inside or outside the other trunk 20, It is also conceivable to install an electric supply line from the control unit 31 to the calculation unit 31 (the other stock 21 may include, for example, a central bore or groove milled outwardly or otherwise integrally molded for this purpose has exist).

To ensure that the rider is in an appropriate operating condition and in particular does not have any damage or malfunction, the rider should normally be checked at regular intervals. For this purpose, it is usually necessary to examine the ship in a regular period of time, for example every two or three years, for a suitable operating condition in the dry dock. It may also be necessary to regularly examine the rudder by a diver performing an external test on the rudder. Thus, typically, monitoring and inspecting the rudder requires a means of continuously and easily monitoring the rudder during the voyage of the ship, possibly at sea, including the high cost and high cost.

This need is even greater for large shots for large vessels, which may have other blades with surface areas of, for example, greater than about 50 m < 2 > In such large-scale applications, the maintenance of spare parts inventory and the occurrence of downtime due to repairs are particularly costly, which is why they are greatly interested in early broad information about the condition and wear of other major components .

For this purpose, a sensor 33 schematically shown in Figs. 1 and 2 is used and the sensor is provided with the other blade 22, which is exposed to a severe load during the operation of the rudder 2, ) And at key points on the component.

By using the sensor 33, continuous control and monitoring of the rudder 2 is enabled at the time of operation of the ship, and when the rudder 2 is subjected to possible wear or malfunction, To directly indicate possible wear or malfunction, other relevant data may be sent to the ship's bridge, for example, or even to an external checkpoint onshore. For example, when an overload of rudder (2) occurs at a location such as a pin (220) or other stock (21), it can be reported either directly to the bridge or to a checkpoint onshore have.

It is possible to monitor all other related data in operation by the other monitoring device 3 including the sensor 33 in the other blade and the calculation unit 31 and the line receiving and evaluating unit 10 as basic components And the pickup of the measurement signal can be performed for a predetermined period of time, for example, every minute or every hour or continuously.

In connection with other monitoring devices 3, it is also possible to use, for example, acceleration sensors, stress gauges, contact sensors or other sensors to properly detect relevant measured amounts which may indicate wear, A sensor 33 in the form of a sensor can be located at all major points. In this manner, for example, the lateral force, the longitudinal force, the other momentum, the pin moment of the pin 220 disposed on the other blade 22, the bearings 210, Wear of the pin bearing 225 and / or vibration of the other blade 22 and / or other stock 21 can be measured. The airtightness in the other trunk 20 for connecting the other blade 22 and the other stock 21 and / or for supporting the other stock 21 can also be monitored. In this way, all relevant components of the other (2) who are exposed to severe loads during the operation of the rudder (2) shall be able to plan and start repair and service measures at the appropriate time and ensure that the major damage of rudder (2) In order to take action before doing so, it may be monitored to immediately indicate wear, malfunction or imminent damage.

For example, the current consumption of the other machine 215 to actuate the other stock 21 and / or the pressure in the hydraulic power transmission system in the other machine 215 may also be monitored by an appropriate sensor, (See FIG. 3 (a) and FIG. 3 (b)), which are arranged in the hull 1 or at least in the region of the hull 1, and are preferably connected directly to the receiving and evaluating unit 10 provided on the hull 1 side.

By means of other monitoring device 3, the relevant measured quantity is detected immediately where it should be monitored. These measured amounts of the measurement signals are then transmitted via the first processing, and the calculation unit 31 is designed as a fully formed calculation unit having the function of the PC, Can be designed as a pre-processing unit in the form of a microcomputer with performance, for example in the form of an integrated circuit on a chip. For example, the purpose of this first data processing is to prepare the detected signal for simple data transfer to the hull 1.

The calculation unit 31 transfers the detected measurement signal to, for example, a receiving and evaluating unit 10 arranged on the line, and the receiving and evaluating unit is operable to detect, for example, an alarm or an impending impairment, Performs processing of the signal and prepares the signal in an appropriate manner. The receiving and evaluating unit 10 can also be configured to send the detected data to a point other than the ship, for example a central check point on the land, or to allow the shipper to retrieve it, Have an opportunity to check the condition of the rudder (2) of the ship. The connection from the ship to the onshore point can be made, for example, via the Internet.

A possible configuration of the connection for transmission of data from the calculation unit 31 at the other blade 22 to the line reception and evaluation unit 10 is shown in Figures 3 (a) and 3 (b).

3 (a), the calculation unit 31 is connected to the on-line receiving and evaluating unit 10 via the at least partly flexible data line 35 and the data line 35 is connected to the other blade 22 so as to be able to follow the movement thereof. The advantage of this connection is that it ensures safe and reliable data transmission.

It is also conceivable to guide the data line 35 toward the hull 1 along the inside or outside of the other trunk 20 or to place the data line 35 in the other stock 21 or another stock (For this purpose, the other stock may be formed to be hollow inside along the rotation axis D, or may include a groove milled into the outer periphery).

In the configuration of FIG. 3 (b), the data transfer is wireless. For this purpose the calculation unit 31 comprises a communication unit with an antenna 310 through which the calculation unit 31 communicates with a corresponding communication unit with an antenna of the reception and evaluation unit 10 . The benefits of wireless connectivity are the simplicity of additional components, especially those without solid physical lines. What should be considered here is the communication path, which can also be at least partially in the water.

The communication between the calculation unit 31 and the reception and evaluation unit 10 mainly serves to transfer the recorded measurement signal from the calculation unit 31 to the reception and evaluation unit 10. [ At the same time, however, it is also possible that a control signal is also communicated from the receiving and evaluating unit 10 to the calculating unit 31, and through the receiving and evaluating unit 10, the calculating unit 31 can be configured and, For example, an inquiry command and a control command are transmitted to the calculation unit 31. In this way, the calculation unit 31 can be instructed to pick up a measurement signal at a predetermined time, for example, when there is a specific request from a ship or a point on the land.

The measured values obtained in connection with the other monitoring by the other monitoring device 3 can also be evaluated together with other measured values, for example from the main machine (shaft performance, propeller speed), and other applications May be provided for additional processing for route control or route optimization of the ship. For this purpose, the other monitoring device 3 can be connected to a data processing interface, which is generally used onboard.

The idea of the present invention is not limited to the above-described exemplary embodiments, but can be used in entirely different embodiments. In particular, the above-described monitoring device can also be applied to all kinds of rats to detect other relevant operating variables in operation.

The present invention forms an electronically monitored rudder that can significantly simplify other monitoring and control. Here, by providing electronic monitoring, it is conceivable that the presently necessary physical inspection by the diver, in particular, can be omitted and all the principal variables can be electronically retrieved and accessed at any time. This saves cost and can significantly reduce the docking time of the ship in the dock because the range of other maintenance is already known before docking.

1: Hull 10: Receiving and evaluation unit
100: Antenna 2: Get on
20: Other trunks 21: Tarstock
210: other support bearing 211: thread end
212: nut 213: conical stock part
214: Neck bearing 22: Other blade
220: pin 221: rudder pin
222: space 223: opening
224: sealing lid 225: pin bearing
226: coupling device 228: inlet opening
3: other monitoring device 31: calculation unit
310: antenna 32: power supply unit
33: sensor 34: signal line
35: Data line D:
D2:

Claims (11)

As marine rudders,
A third blade that can be disposed on the hull so as to rotate around the rotation axis,
Another stock for applying a torque to the other blade, and
Other monitoring devices (3)
/ RTI >
The other monitoring device (3)
At least one sensor (33) disposed on the other blade (22) or the other stock (21) for picking up a measurement signal related to the state of the other blade (22) or the other stock (21)
Having one or more calculation units (31) connected to one or more of said sensors (33) and arranged on said other blade (22) for evaluating and communicating said measurement signals picked up by one or more said sensors With a ship. The method according to claim 1,
The first sensor 33 is disposed on the bearing 214 for supporting the other stock 21 against the hull 1 in order to measure the clearance in the bearing 214,
The second sensor 33 includes a bearing 214 for supporting the other stock 21 against the hull 1 to monitor the position of the bearing 214 or a portion of the bearing 214. [ Respectively,
The third sensor 33 is disposed at a connection point 211 between the other stock 21 and the other blade 22 to monitor the connection between the other stock 21 and the other blade 22 For marine use. The method according to claim 1,
Wherein the at least one sensor (33) is formed as an acceleration sensor, a stress gauge, a contact sensor, a tear wire, a pressure sensor, a humidity sensor or a current measurement sensor. The method according to claim 1,
The at least one sensor (33)
Lateral force,
Longitudinal striking force,
Other stockmormants,
Pin motions of the pins 220 disposed on the other blades 22,
The wear limit of the bearings 210, 214 of the other stock 21,
The wear limit of the pin bearing 225,
The vibration of the other blade (22) and the other stock (21)
The current consumption of the other machine 215 for operating the other stock 21,
Pressure in hydraulic power transmission system
At least one of them is measured,
Is configured to monitor at least one of the connection of the other stock (21) and the other blade (22) and the tightness in the other trunk (20) to support the other stock (21). The method according to claim 1,
Wherein the at least one sensor (33) is configured to pick up one or more measurement signals at predetermined time intervals or in a time series manner. 6. The method according to any one of claims 1 to 5,
The calculation unit (31) is disposed in a space (222) to be watertightly closed at the other blade (22). 6. The method according to any one of claims 1 to 5,
Wherein the calculation unit (31) is connected to a power supply unit (32) disposed in the other blade (22). 8. The method of claim 7,
The power supply unit (32) is formed as a battery. 8. The method of claim 7,
The power supply unit (32) is formed as a generator and is operatively connected to a passage (227) through which water will run in the other blade (22) to generate electrical energy. 6. The method according to any one of claims 1 to 5,
Through the data line 35, the calculation unit 31 can be connected to the receiving and evaluating unit 10 disposed outside the other blade 22. 6. The method according to any one of claims 1 to 5,
Wherein the calculation unit (31) is connected to an antenna (310) for transferring wireless data to a receiving and evaluating unit (10) disposed outside the other blade (22).

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