EP4067551B1 - Motion monitoring device for monitoring the movement of a drum of a washing machine - Google Patents

Description

The present invention relates to a movement monitoring arrangement for monitoring a movement of a laundry drum of a laundry treatment device and also to a laundry treatment device with such a movement monitoring arrangement.

In laundry treatment devices such as washing machines and tumble dryers, a tub is usually mounted so that it can oscillate via springs and vibration dampers in the machine housing and a laundry drum is rotatably mounted inside the tub. In order to achieve a good flow of the planned laundry treatment process and to avoid operational failures or operational problems, it is important to monitor the operating status of the laundry treatment device. For this purpose, an imbalance of the laundry drum is usually also detected, which can occur particularly with large load masses and at high speeds of the laundry drum, in order to adapt the operation of the drum so that critical operating behavior of the laundry drum can be avoided. For such unbalance detection, conventionally, for example, the operating state of the electric motor for driving the laundry drum is detected or the laundry drum or tub is equipped with additional elements that are monitored by, for example, optical or magnetic sensors. DE 10 2017 000 606 A1 and US 2020/0378051 A1 each disclose a laundry treatment device with movement monitoring of the laundry drum by motion sensors, on which the preamble of the appended independent claim 1 is based.

It is the object of the invention to provide improved operational monitoring of a laundry treatment device.

This object is achieved by a motion monitoring arrangement with the features of independent claim 1. Particularly advantageous refinements and developments of the invention are the subject of the dependent claims.

The motion monitoring arrangement according to the invention for monitoring a movement of a laundry drum of a laundry treatment device has: at least two motion sensors, each of which is designed for multi-axis motion detection; at least one mounting element for rigidly mounting components of the motion monitoring arrangement on the laundry drum or another movable component (e.g. tub), the movement of which is coupled to the movement of the laundry drum, with fixed positioning of the at least two motion sensors; and an operating device for controlling the at least two motion sensors and evaluating the measurement signals of the at least two motion sensors, which is connected to the at least two motion sensors. According to the invention, the motion monitoring arrangement further has a communication element connected to the operating device (e.g. integrated or coupled), which is configured to receive data of the mounting positions of the at least two motion sensors from a machine control of the laundry treatment device and to transmit it to the operating device, and to transmit the evaluation results of the Send operating device to the machine control and / or motor electronics of the laundry treatment device. In addition, according to the invention, the operating device is configured to adapt the evaluation of the measurement signals from the at least two motion sensors to the mounting position data transmitted by the communication element. The machine control has received appropriate information about this mounting position data, for example from the manufacturer or installer of the laundry treatment device.

Unlike most conventional laundry processing devices, using this motion monitoring arrangement does not require any adjustment or modification of the other device components. In particular, it is not necessary to equip the laundry drum or the tub with additional structures or elements for, for example, optical or magnetic detection of the movement of the respective component. In addition, the configuration of the machine control and the motor electronics of the laundry treatment device does not need to be modified, or only insignificantly, because they do not require any specially generated measurement signals have to evaluate, but receive evaluation results of the measurement signals directly from the motion monitoring arrangement according to the invention. This advantageously results in simpler and more cost-effective structures and production of the laundry treatment devices.

The motion monitoring arrangement of the invention can preferably be used for the overall operational monitoring of the laundry treatment device. This particularly includes unbalance detection.

By using multiple multi-axis motion sensors, real-time measurement of the movement of the laundry drum can also be achieved. The motion sensors with multi-axis motion detection are preferably 3D sensors or at least 2D sensors.

The motion monitoring arrangement, in particular the motion sensors, can generally be installed at any position on the laundry drum or, for example, the tub. The rigid mounting of the motion monitoring arrangement with fixed positioning of the motion sensors ensures that the motion sensors remain essentially stationary and positioned with a substantially stable orientation even during operation of the laundry treatment device and that the relative positioning between the motion sensors remains essentially unchanged even during operation of the laundry treatment device remains. This can ensure that the movement of the motion sensors corresponds to the movement of the laundry drum or tub and so that their measurement signals directly represent the movements of the laundry drum or tub and the evaluation of the measurement signals can be reliably guaranteed by the operating device.

The at least two motion sensors preferably include at least one acceleration sensor and/or at least one gyroscope. Preferably, the motion monitoring arrangement includes a 3D acceleration sensor and a 3D gyroscope. Optionally, the motion monitoring arrangement can also contain, for example, two or more multi-axis acceleration sensors and/or two or more multi-axis gyroscopes.

In one embodiment of the invention, the at least two motion sensors can be mounted on a common support plate, which can be mounted on the laundry drum or the other movable component via the at least one mounting element. In this case, the operating device can either (i) also be mounted on the common support plate or (ii) be mounted on a separate support plate, which has at least one mounting element (iia) on the laundry drum or the other movable component or (iib) separately from the laundry drum and the other movable component can be mounted.

In another embodiment of the invention, the at least two motion sensors can each be mounted individually on an individual support plate, which can each be mounted on the laundry drum or the other movable component via at least one mounting element of the at least one mounting element. In this case, the operating device can optionally (i) be mounted on one of the individual support plates for one of the motion sensors or (ii) be mounted on a separate support plate which is attached to the laundry drum or the other movable component via at least one mounting element (iia) or ( iib) can be mounted separately from the laundry drum and the other movable component.

The carrier plates mentioned in the aforementioned embodiments can optionally also be part of a housing of the motion monitoring arrangement or can be designed in the form of a circuit board. When using more than two motion sensors in the motion monitoring arrangement, the two aforementioned configurations can also be combined, i.e. at least one common carrier plate can be provided for at least two motion sensors and at least one further carrier plate for a single motion sensor.

• absolute Drehstellung der Wäschetrommel,
• Drehzahl der Wäschetrommel,
• Massenmittelpunkt der Wäschetrommel,
• Masse der Wäschetrommel,
• Unwucht der Wäschetrommel (Unwuchtmasse, Unwuchtposition, etc.),
• Schwingfrequenz der Wäschetrommel,
• Position / Ausrichtung der Wäschetrommel relativ zu einem Maschinengehäuse oder einer anderen Komponente des Wäschebehandlungsgeräts, und
• Anschlag der Wäschetrommel oder der anderen beweglichen Komponente (z.B. Bottich) an einem Maschinengehäuse oder einer anderen Komponente des Wäschebehandlungsgeräts.

The operating device of the motion monitoring arrangement can be configured to provide, as evaluation results of the measurement signals from the at least two motion sensors, an imbalance of the laundry drum (unbalanced mass, unbalanced position, etc.) and/or an event caused by the imbalance of the laundry drum (e.g. impact of the laundry drum or the tub on the machine housing). The operating device of the motion monitoring arrangement can, for example, be configured to determine at least one of:

• absolute rotation position of the laundry drum,
• speed of the laundry drum,
• center of mass of the laundry drum,
• mass of the laundry drum,
• Unbalance of the laundry drum (unbalanced mass, unbalanced position, etc.),
• Oscillation frequency of the laundry drum,
• Position/orientation of the laundry drum relative to a machine housing or other component of the laundry treatment device, and
• Stop of the laundry drum or other moving component (e.g. tub) on a machine housing or another component of the laundry treatment device.

The operating device is preferably configured to determine the evaluation results based on the timing of the measurement signals from all motion sensors across all measurement axes.

In one embodiment of the invention, the motion monitoring arrangement further has at least one energy supply element for generating and/or receiving electrical energy for the operation of the motion monitoring arrangement, in particular for the operation of its operating device, its motion sensors and its communication element. The energy supply element can also be designed to store the generated or received electrical energy. The electrical energy from the energy supply element can be received, for example, via a connecting line or wirelessly from the machine control of the laundry treatment device.

The movement monitoring arrangement described above can advantageously be used in a laundry treatment device which has a machine housing, a tub which is suspended in the machine housing so that it can oscillate, a laundry drum which is rotatably mounted in the tub about an axis of rotation, an electric motor for rotating the laundry drum, motor electronics for operational control of the electric motor, and a machine control connected to the motor electronics (eg integrated or coupled) for controlling the operation of the laundry treatment device. The at least two motion sensors of the motion monitoring arrangement are for monitoring a movement of the laundry drum preferably mounted on the laundry drum or on the tub and the operating device of the movement monitoring arrangement is preferably connected to the machine control and / or the motor electronics. The at least two motion sensors of the motion monitoring arrangement can be mounted, for example, on an axial end face of the laundry drum or tub. The machine control can, for example, be configured to receive information from the manufacturer or installer of the laundry treatment device corresponding to the mounting position data of the at least two motion sensors. The laundry treatment device is, for example, a washing machine, a tumble dryer or a washing machine-dryer combination. The invention is applicable for household appliances as well as for business or industrial purposes.

Fig. 1

eine Schnittansicht eines Ausführungsbeispiels eines Wäschebehandlungsgeräts gemäß der Erfindung;

Fig. 2A

eine Basisstruktur eines ersten Ausführungsbeispiels einer Bewegungsüberwachungsanordnung gemäß der Erfindung;

Fig. 2B

eine Basisstruktur einer Ausführungsvariante des ersten Ausführungsbeispiels von Fig. 2A gemäß der Erfindung;

Fig. 3A

eine Basisstruktur eines zweiten Ausführungsbeispiels einer Bewegungsüberwachungsanordnung gemäß der Erfindung; und

Fig. 3B

eine Basisstruktur einer Ausführungsvariante des zweiten Ausführungsbeispiels von Fig. 3A gemäß der Erfindung.

The above and other features and advantages of the invention will be better understood from the following description of preferred, non-limiting exemplary embodiments with reference to the accompanying drawing. It shows, mostly schematically:

Fig. 1

a sectional view of an embodiment of a laundry treatment device according to the invention;

Fig. 2A

a basic structure of a first embodiment of a motion monitoring arrangement according to the invention;

Fig. 2B

a basic structure of an embodiment variant of the first embodiment of Fig. 2A according to the invention;

Fig. 3A

a basic structure of a second embodiment of a motion monitoring arrangement according to the invention; and

Fig. 3B

a basic structure of an embodiment variant of the second embodiment of Fig. 3A according to the invention.

Fig. 1 shows an example of the structure of a washing machine as an example of a laundry treatment device in which the motion monitoring arrangement according to the invention can be used.

The washing machine 10 has a machine housing 12 in which a tub (alternatively referred to as a tub) 14 is suspended so that it can oscillate via springs 15 and vibration dampers 16. A laundry drum 18 is rotatably mounted within the tub 14. In the exemplary embodiment of Fig. 1 the axis of rotation 19 of the laundry drum 1 runs essentially horizontally. To rotate the laundry drum 18, an electric motor 20 is provided, which drives the laundry drum 18 directly or via a belt drive.

The electric motor 20 is controlled by motor electronics 21. The motor electronics 21 is connected to the central machine control 22 of the washing machine 10 in order to transmit control signals to the motor electronics 21 and operating data from the electric motor. In this exemplary embodiment, the engine electronics 21 is coupled to the machine control 22 as a separate component; in other embodiments of the invention, the engine electronics 21 can also be integrated into the machine control 22. The machine controller 22 is also connected to a control panel 24 of the washing machine 10 to display operating information to the user and to carry out the laundry treatment process selected by the user. Alternatively, the machine control 22 can also be integrated into the control panel 24.

As in Fig. 1 shown, a movement monitoring arrangement 28 is mounted, for example, on an axial end face of the tub 14. The movement monitoring arrangement 28 monitors the movement of the tub 14 and thus automatically also the movement of the laundry drum 18 stored therein. The movement monitoring arrangement 28 is also connected to the machine control 22 (wirelessly or by cable), in particular for transmitting evaluation results of the measurement signals to the machine control 22. Alternatively or additionally, the motion monitoring arrangement 28 can also be connected to the motor electronics 21 (wirelessly or via cable). The machine control 22 or the motor electronics 21 can then change the operating state of the electric motor 20 and thus the laundry drum 18 if necessary based on the evaluation results received from the motion monitoring arrangement 28 in order to avoid problems or malfunctions in the laundry treatment process. This can be achieved in particular by changing the speed of the laundry drum 18. The machine control can be optional 22 or the engine electronics 21, based on the received evaluation results, also send corresponding information or a warning signal to the control panel 24 if necessary in order to inform the user accordingly.

While in the exemplary embodiment of Fig. 1 If the motion monitoring arrangement 28 is mounted on an axial end face of the tub 14, the motion monitoring arrangement 28 can alternatively also be mounted at any other location on the tub 14 or can be mounted at any location on the laundry drum 18.

As in Fig.1 indicated, the motion monitoring arrangement 28 can be dimensioned significantly smaller than, for example, the machine control 22. When using a circuit board for the motion monitoring arrangement 28 and the machine control 22, their area for the motion monitoring arrangement could, for example, only be approximately a tenth of the area for the machine control 22.

A first exemplary embodiment of a structure of the motion monitoring arrangement 28 is exemplified in Fig. 2A illustrated.

The movement monitoring arrangement 28 comprises a common carrier plate 280, which can be designed, for example, as a circuit board or as part of a housing, which can be mounted firmly/rigidly on the tub 14 or the laundry drum 18 via a mounting element 281. An operating device 282, a first motion sensor 284 in the form of a preferably 3D acceleration sensor, a second motion sensor 285 in the form of a preferably 3D gyroscope, a communication element 287 and a power supply element 288 are mounted on the common carrier plate 280. The at least two motion sensors 284, 285 are firmly mounted on the common carrier plate 280 and thus rigidly on the tub 14 or the laundry drum 18, so that their movements correspond to the movement of the tub 14 or the laundry drum 18 and their positions, orientations and relative position also during operation the washing machine 10, ie with the laundry drum 18 moving and the tub 14 moving accordingly, remain essentially unchanged.

The common support plate 280 can be shaped substantially square or rectangular, for example. In the case of a square carrier plate 280, its side lengths can each be approximately 40 mm, for example, and their layer thickness can be approximately 15 mm, for example.

• absolute Drehstellung der Wäschetrommel 18,
• Drehzahl der Wäschetrommel 18,
• Massenmittelpunkt der Wäschetrommel 18 (einschließlich Beladungsmasse),
• Masse der Wäschetrommel 18 (einschließlich Beladungsmasse),
• Unwucht der Wäschetrommel 18 (Unwuchtmasse, Unwuchtposition, etc.),
• Schwingfrequenz der Wäschetrommel 18,
• Position / Ausrichtung der Wäschetrommel 18 relativ zum Maschinengehäuse 12 oder einer anderen Komponente der Waschmaschine 10, und
• Anschlag der Wäschetrommel 18 oder des Bottichs 14 am Maschinengehäuse 12 oder einer anderen Komponente der Waschmaschine 10.

The motion sensors 284, 285 are connected to the operating device 282, so that the operating device 282 can send control signals (e.g. starting or ending the measuring function) to the motion sensors 284, 285 and can receive measuring signals from the motion sensors 284, 285. The operating device 282 has, for example, a microcontroller and is configured to control the motion sensors 284, 285 and to evaluate the measurement signals of the motion sensors 284, 285. The operating device 282 can generate evaluation results for all measurement axes based on the timing of the measurement signals of both motion sensors 284, 285 determine the operational monitoring of the washing machine 10, in particular including imbalance detection. Based on the measurement signals from the 3D motion sensors 284, 285, the operating device 282 can, for example, determine one or more of the following evaluation results:

• absolute rotation position of the laundry drum 18,
• Speed of the laundry drum 18,
• Center of mass of the laundry drum 18 (including load mass),
• Mass of the laundry drum 18 (including load mass),
• Unbalance of the laundry drum 18 (unbalanced mass, unbalanced position, etc.),
• Oscillation frequency of the laundry drum 18,
• Position/orientation of the laundry drum 18 relative to the machine housing 12 or another component of the washing machine 10, and
• Stop of the laundry drum 18 or the tub 14 on the machine housing 12 or another component of the washing machine 10.

The operating device 282 is connected to the communication element 287 in order to transmit these evaluation results to the machine control 22 and/or the motor electronics 21 of the washing machine 10. In this exemplary embodiment, the communication element 287 is coupled to the operating device 282 as a separate component; in other embodiments of the invention, the communication element 287 can also be integrated into the operating device 282. About the Communication element 287 also transmits data about the mounting position of the common carrier plate 280 and thus the motion sensors 284, 285 on the tub 14 to the operating device 282 from the machine control 22. The operating device 282 can then adapt the evaluation of the measurement signals from the motion sensors 284, 285 to this mounting position, since the type and extent of the movement of the motion sensors depend on their positions on the tub. The assembly positions can, for example, be entered into the machine control 22 by the manufacturer or installer of the washing machine 10.

The energy supply element 288 supplies the operating device 282, the motion sensors 284, 285 and the communication element 287 with electrical energy. Depending on the embodiment, the energy supply element 288 itself can generate energy and/or receive energy (for example from the machine control 22) and preferably also store energy.

Fig. 2B shows an embodiment variant of the in Fig. 2A The structure of the movement monitoring arrangement 28 shown. In contrast to Fig. 2A only the at least two motion sensors 284, 285 and the energy supply element 288 are mounted on the common support plate 280, which can be mounted on the laundry drum 18 or on the tub 14 via the mounting element 281. The operating device 282 and the communication element 287, however, are mounted on a separate carrier plate 280a (eg circuit board or housing component). This separate carrier plate 280a can then also be mounted on the laundry drum 18 or on the tub 14 via at least one further mounting element 281a or alternatively at any other location in the laundry treatment device 10 (eg on an inner wall of the machine housing 12). The operating device 282 on the separate carrier plate 280a is connected, for example wirelessly, to the at least two motion sensors 284, 285 on the common carrier plate 280 for signal exchange.

A second exemplary embodiment of a structure of the motion monitoring arrangement 28 is exemplified in Fig. 3A illustrated. The same or corresponding components are given the same or analogous reference numbers as in Fig. 2A marked.

The motion monitoring arrangement 28 from Fig. 3A includes several separate / individual carrier plates 280a, 280b, 280c, each, for example, as a circuit board or can be designed as part of a housing and which can each be mounted firmly/rigidly on the tub 14 or the laundry drum 18 via a corresponding mounting element 281a, 281b or 281c. The operating device 282, the communication element 287 and the energy supply element 288 are mounted on the first carrier plate 280a, the first motion sensor 284 in the form of a preferably 3D acceleration sensor is mounted on the second carrier plate 280b, and the second motion sensor 285 is mounted on the third carrier plate 280c Mounted in the form of a preferably 3D gyroscope. The two motion sensors 284, 285 are each individually firmly mounted on the respective carrier plate 280b, 280c and thus rigidly on the tub 14 or the laundry drum 18, so that their movements correspond to the movement of the tub 14 or the laundry drum 18 and their positions, orientations and relative position remain unchanged even when the washing machine 10 is in operation, ie when the tub 14 is moving. With a larger number of motion sensors, a correspondingly larger number of carrier plates 280n with corresponding mounting elements 281n are provided. The operating device 282 on the separate carrier plate 280a is connected, for example wirelessly, to the at least two motion sensors 284, 285 on the separate carrier plates 280b, 280c for signal exchange. The energy supply element 288 on the separate carrier plate 280a is connected to the at least two motion sensors 284, 285 on the separate carrier plates 280b, 280c for energy supply, for example via power cables.

The more detailed descriptions, connections and functions of the components of the motion monitoring arrangement 28 otherwise correspond to those of the exemplary embodiment of Fig. 2A , which is why a repeated description is omitted.

Fig. 3B shows an embodiment variant of the in Fig. 3A The structure of the movement monitoring arrangement 28 shown. In contrast to Fig. 3A only the at least two motion sensors 284, 285 are mounted on the separate support plates 280b, 280c via the corresponding mounting elements 281b, 281c on the laundry drum 18 or on the tub 14. The operating device 282 and the communication element 287 on the separate carrier plate 280a, however, are mounted at any other location in the laundry treatment device 10 (for example on an inner wall of the machine housing 12) via the corresponding mounting element 281a. The operating device 282 on the separate carrier plate 280a is connected wirelessly, for example, to the at least two motion sensors 284, 285 on the laundry drum 18 or on the tub 14 for signal exchange. To supply energy to the motion sensors 284, 285, an energy supply element 288 is also mounted on the carrier plates 280b, 280c.

While the motion monitoring arrangement 28 in the two exemplary embodiments of Fig. 2A /B and 3A/B each contains an acceleration sensor 284 and a gyroscope 285, the motion monitoring arrangement 28 can alternatively also contain a total of more than two motion sensors, only acceleration sensors, only gyroscopes and/or other types of motion sensors.

Through this use of the at least two motion sensors 284, 285 directly on the tub 14, additional elements on the tub 14 or on the laundry drum 18 can be dispensed with in order to determine the movement of the tub 14 and thus the laundry drum 18, which are used in other conventional washing machines, for example Separate sensors can be monitored optically or magnetically. And since the machine control 22 receives evaluation results directly from the motion monitoring arrangement 28 instead of just measurement signals, the operation of the machine control 22 does not need to be modified or made more complex. Since the evaluation results of the motion monitoring arrangement 28 can contain various operating states, including in particular unbalance detection, an additional evaluation of operating data of the electric motor 20 can also be avoided or at least reduced.

REFERENCE NUMBER LIST

10

Laundry treatment device (e.g. washing machine)

12

Machine housing

14

vat

15

feathers

16

Vibration damper

18

laundry drum

19

Axis of rotation

20

Electric motor

21

Engine electronics

22

Machine control

24

Control panel

28

Motion monitoring arrangement

280

carrier plate

280n

individual carrier plates

281

Mounting element

281n

individual assembly elements

282

Operating device (control and evaluation)

284

first motion sensor (e.g. acceleration sensor)

285

second motion sensor (e.g. gyroscope)

287

Communication element

288

Energy supply element

Claims (13)

1. Motion monitoring arrangement (28) for monitoring motion of a laundry drum (18) of a laundry treatment device (10), having:

   at least two motion sensors (284, 285) which are each designed for multiple-axis motion detection;

   at least one mounting element (281; 281n) for fixedly mounting components of the motion monitoring arrangement (28) on the laundry drum (18) or another moveable component (14), the motion of which is coupled to the motion of the laundry drum, with fixed positioning of the at least two motion sensors (284, 285); and

   an operating apparatus (282), which is connected to the at least two motion sensors (284, 285), for actuating the at least two motion sensors and evaluating the measurement signals from the at least two motion sensors;

   characterized in that

   the motion monitoring arrangement (28) also has a communications element (287) which is connected to the operating apparatus (282) and is configured in order to receive data relating to the mounting positions of the at least two motion sensors (284, 285) from a machine controller (22) of the laundry treatment device (10) and to transmit the said data to the operating apparatus (282), and in order to send the evaluation results from the operating device (282) to the machine controller (22) and/or a motor electronics system (21) of the laundry treatment device (10); and

   the operating apparatus (282) is configured in order to adapt the evaluation of the measurement signals from the at least two motion sensors (284, 285) to the mounting position data transmitted by the communications element (287) .
2. Motion monitoring arrangement (28) according to Claim 1, in which the at least two motion sensors (284, 285) comprise at least one acceleration sensor (284) and/or at least one gyroscope (285).
3. Motion monitoring arrangement (28) according to Claim 1 or 2, in which the at least two motion sensors (284, 285) are mounted on a common support plate (280) which can be mounted on the laundry drum (18) or the other moveable component (14) via the at least one mounting element (281).
4. Motion monitoring arrangement (28) according to Claim 3, in which the operating apparatus (282) is likewise mounted on the common support plate (280) or is mounted on a separate support plate (280a) which can be mounted on the laundry drum (18) or the other moveable component (14) or separately from the laundry drum (18) and the other moveable component (14) via at least one mounting element (281a).
5. Motion monitoring arrangement (28) according to Claim 1 or 2, in which the at least two motion sensors (284, 285) are each individually mounted on an individual support plate (280b, 280c) which can each be mounted on the laundry drum (18) or the other moveable component (14) in each case via at least one mounting element (281b, 281c) of the at least one mounting element.
6. Motion monitoring arrangement (28) according to Claim 5, in which the operating apparatus (282) is mounted on one of the individual support plates (280b, 280c) for one of the motion sensors or is mounted on a separate support plate (280a) which can be mounted on the laundry drum (18) or the other moveable component (14) or separately from the laundry drum (18) and the other moveable component (14) via at least one mounting element (281a).
7. Motion monitoring arrangement (28) according to one of the preceding claims, in which the operating apparatus (282) is configured to ascertain as evaluation results of the measurement signals from the at least two motion sensors (284, 285) at least one from amongst an unbalance of the laundry drum (18) and an event caused by the unbalance of the laundry drum (18).
8. Motion monitoring arrangement (28) according to one of the preceding claims, in which the operating apparatus (282) is configured in order to ascertain as evaluation results of the measurement signals from the at least two motion sensors (284, 285) at least one from amongst:

   - absolute rotational position of the laundry drum (18),

   - rotation speed of the laundry drum (18),

   - centre of mass of the laundry drum (18),

   - mass of the laundry drum (18),

   - unbalance of the laundry drum (18),

   - oscillating frequency of the laundry drum (18),

   - position/orientation of the laundry drum (18) relative to a machine housing (12) or another component of the laundry treatment device (10), and

   - the laundry drum (18) or the other moveable component (14) striking a machine housing (12) or another component of the laundry treatment device (10).
9. Motion monitoring arrangement (28) according to one of the preceding claims, in which the operating apparatus (282) is configured in order to ascertain the evaluation results based on the time course of the measurement signals from all of the motion sensors (284, 285) over all measurement axes.
10. Motion monitoring arrangement (28) according to one of the preceding claims, further having at least one energy supply element (288) for generating and/or receiving electrical energy for operating the motion monitoring arrangement (28).
11. Laundry treatment device (10), having:

    a machine housing (12);

    a tub (14) which is suspended in the machine housing (12) such that it can vibrate (15, 16);

    a laundry drum (18) which is mounted rotatably about a rotation axis (19) in the tub (14);

    an electric motor (20) for driving the laundry drum (18) in rotation;

    a motor electronics system (21) for controlling operation of the electric motor (20); and

    a machine controller (22) for controlling the operation of the laundry treatment device (10), which machine controller is connected to the motor electronics system (21),

    characterized in that

    the laundry treatment device (10) further has a motion monitoring arrangement (28) for monitoring motion of the laundry drum (18) according to one of the preceding Claims 1 to 10, wherein the at least two motion sensors (284, 285) of the motion monitoring arrangement (28) are mounted on the laundry drum (18) or on the tub (14) and the operating apparatus (282) of the motion monitoring arrangement (28) is connected to the machine controller (22) and/or the motor electronics system (21).
12. Laundry treatment device (10) according to Claim 11, in which the at least two motion sensors (284, 285) of the motion monitoring arrangement (28) are mounted on an axial end side of the laundry drum (18) or the tub (14).
13. Laundry treatment device (10) according to Claim 11 or 12, in which the machine controller (22) is configured in order to receive instructions corresponding to the data relating to the mounting positions of the at least two motion sensors (284, 285) from the manufacturer or installer of the laundry treatment device.

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