DE102013222154A1 - Monitoring device for detecting an operating state - Google Patents

Abstract

The invention relates to a monitoring device (100) for an agricultural vehicle (1) and / or to an implement (10) which can be coupled to the agricultural vehicle via a pto (3) of the agricultural vehicle, with a device (20) for detecting an operating state of the agricultural vehicle and / or attachment, wherein the device (20) has an electronic sensor device (21) with a sensor element for detecting vibrations of the agricultural vehicle and / or attachment and is arranged on a connection (2; 12) of the PTO shaft. Furthermore, the invention relates to a method for detecting an operating state.

Description

Field of the invention

The present invention relates to a monitoring device according to the preamble of claim 1 and a method according to the preamble of the independent method claim.

Background of the invention

Agricultural equipment, e.g. Attachments or implements intended for coupling to an agricultural vehicle are often powered mechanically via a rear or front PTO of the agricultural vehicle. To avoid overloading and to protect the equipment or the agricultural vehicle friction clutches can be used, which transmit only a certain maximum torque. The slip clutch is designed to detect an operating state and to interrupt torque transmission when a limit value, in particular maximum torque, is exceeded. Thus, the slip clutch can be referred to as a device.

In this type of mechanical overload protection, however, can not be detected when an overload will occur, but the clutch reacts only in the moment of overload. The detected operating state is always an operating state in which an overload occurs. As soon as the coupling opens, the attachment is protected against overloading, but at the same time the intended functioning of the attachment can no longer be ensured because a torque transmission has been interrupted, with the result that the work result is no longer satisfactory. Bad or sluggish slip clutches, e.g. only well below a threshold from which they open, close again, can be used in agricultural machines e.g. lead to crop failures. Slip clutches also often bring a lot of effort, be it higher costs, be it a more complex interface between the agricultural vehicle and the attachment. Also, it can often not be avoided that an attachment is subjected to a great deal of stress despite the friction clutch, e.g. if it is used for a long time just below the limit from which opens the slip clutch.

Summary of the invention

It is an object of the invention to provide a device for detecting an operating state of an attachment and / or an agricultural vehicle, by means of which an overload can be detected in a simple manner, in particular also can be predicted.

The object is achieved by a monitoring device for an agricultural vehicle, in particular a tractor, and / or for an implement which can be coupled to the agricultural vehicle via a pto of the agricultural vehicle, with a device for detecting an operating state of the agricultural vehicle and / or attachment, the device comprising an electronic sensor device with a sensor element for detecting vibrations of the agricultural vehicle and / or attachment and is arranged at a connection for the PTO. As a result, can be dispensed with slip clutches. The operating state can be actively detected, and the measured values detected by the sensor device can be evaluated, and an attachment can be adjusted as a function of the load. Nevertheless, it may also be advantageous to provide a slipping clutch in addition to the monitoring device according to the invention, e.g. to respond more safely to unpredictable load peaks (e.g., tool blocks caused by stones or other blocking objects). The sensor device can also be provided on the attachment itself.

The operating state can be characterized by the vibration characteristics of the PTO, in particular via a rotational speed of the PTO shaft and / or the transmitted torque, or in dependence on a driving speed of the agricultural vehicle. Adjusting the operating condition may include adjusting the PTO.

The sensor device is preferably designed as an adaptive sensor device, which The sensor device preferably also allows functions such. a trend display or an alarm threshold adjustment.

The device preferably has a display on which the operating state can be displayed. The device may also have individual warning lights to visualize by green, yellow or red light an uncritical or critical operating condition.

It has been found that it is precisely by detecting vibrations with a certain lead time that it is possible to detect whether an overload condition will soon be reached. The oscillations usually have a certain course, ie show an increasing or decreasing amplitude or phase duration. In soil cultivation can be detected by vibration detection, for example Whether a soil is getting harder or softer, so whether the currently processed portion of a field is rather dry or wet, and an attachment can then be adjusted accordingly. Individual vibration modes can be evaluated, for example, by detecting a specific increase in the frequencies of the exciter of the multiple order and / or by detecting the amplitude of the determined frequency of the exciter taking into account a specific engine speed.

In an arrangement in the region of the connection of the PTO shaft, a state or a load of the PTO shaft during operation of the agricultural machine can be monitored. This makes it possible to monitor load conditions of any attachment, without requiring a sensor device, in particular an acceleration pickup, for each attachment. Rather, it is sufficient to equip only the agricultural vehicle with the sensor device. The sensor device is for detecting e.g. Driveline vibrations formed.

In this case, it is also possible to detect vibrations away from a bearing, in particular a roller bearing. In particular, over the frequency range of the oscillations can be determined on which component of the agricultural vehicle or attachment the vibrations occur, ie from which component they are caused, and at what loads the vibrations can lead to the respective components. Each rotating component provides a certain excitation (with a certain frequency), and the vibration signal can be evaluated via the simple excitation frequency or the multiple order. For assigning certain vibrations to individual pathogens, certain frequency bands or frequency ranges can be defined and analyzed.

As a power take-off is to be understood preferably a power take-off, which can be connected during operation of the agricultural vehicle. The PTO can be in different ways, e.g. as a power take-off, as a transmission PTO, or as a PTO. The PTO can also be referred to as a "power take-off" (PTO). Preferably, the monitoring device is a transmission PTO, which is arranged at the front or rear of an agricultural vehicle. According to a variant, the power take-off may also be a hydraulically driven PTO, which is housed and stored by a box or a housing.

As a connection is to be understood preferably a machine element of the agricultural vehicle or attachment, on or in which the PTO is guided or stored, or with which the PTO is in mechanical contact. Preferably, the port is statically stationary, that is, the port does not rotate like the PTO about any axis. As a result, a vibration can be detected independently of centrifugal forces. The connection preferably comprises a transmission housing of the (gearbox) PTO shaft. A preferred arrangement for the sensor is the PTO housing (gear housing), in which the mechanical power penetration takes place. By attaching the sensor at least in the vicinity of the PTO connection on the fixed gear housing can be influenced by how good the reception data. The arrangement directly on the rigid gear housing of the PTO delivers meaningful signals without noticeable time delay. The farther the sensor position is from the power punch, the harder it is to evaluate the received signals.

As an arrangement at the connection of the PTO is to be understood an arrangement in which the sensor device is mounted on a surface of the terminal or is integrated in any way in the terminal. Preferably, the connection comprises a (gearbox) housing of the power take-off shaft, wherein the sensor device is arranged on a surface of the housing, in particular screwed to the surface.

Preferably, the sensor device is arranged as close as possible next to the PTO shaft. As an arrangement next to the PTO is also an arrangement on a machine element to understand, which is connected to the terminal, in particular attached to the terminal.

An arrangement next to the PTO shaft provides the advantage that at the point of a load can be determined, on which usually a mechanical slip clutch is provided. Optionally, the sensor device can be arranged on a connection of the attachment. An arrangement close to or on the attachment makes it easier to deduce a load condition of the attachment than if the sensor device is located somewhere on the agricultural vehicle at a greater distance from the power take-off, and an influence of vibrations of the agricultural vehicle, which is an evaluation of the detected vibrations may complicate the attachment, can be kept low.

By means of an arrangement on the connection, an oscillation can be detected at an already present interface, which makes it possible to draw conclusions about the operating state of the attachment and permits a predictive control of the attachment. In contrast to Slip clutches which open when overloaded can be detected when evaluating vibrations, whether the attachment is subject to an increasing or decreasing loading strength. By controlling parameters such as the traveling speed of the agricultural vehicle, it is then possible to avoid overburdening. This makes it possible, on the one hand, to dispense with the permanent use of a slip clutch; on the other hand, it is also possible to avoid a partial or temporary failure of the attachment. As a result, for example, can be worked with a tillage more carefully and without interruptions. A crop yield can be increased. However, it remains advantageous in many cases, continue to provide a slip clutch. Obstacles such as objects that get into the machine and force them immediately to a halt, can indeed be determined by means of the monitoring device according to the invention, but only with regard to a high system security, it may be advisable depending on the type of attachment, the attachment in an emergency by means of a slip clutch to decouple.

The agricultural vehicle is preferably a tractor which has any type of power take-off shaft, wherein the sensor device is arranged next to a coupling of the power take-off, in particular on a connection or machine element connected in one piece to a bearing of the power take-off, or at a distance of not more than 1 to 50 cm thereof, preferably 2 to 20 cm, more preferably 5 to 20 cm. This allows a meaningful vibration detection regardless of whether the PTO is verkuppelt. This makes it possible, for example, to calibrate the sensor device by determining the natural vibrations of the agricultural vehicle. Here, a signal acquisition without noticeable delay can be ensured.

According to a variant, the agricultural vehicle is a tractor which has a gear PTO shaft, wherein the sensor device is arranged on a housing of the power take-off gear, and wherein the housing is connected to the terminal. As a result, simple, quick to carry out installation and interchangeability can be ensured. Also, the sensor device can be coupled to the housing, regardless of the internal geometry of the transmission.

According to one embodiment, the sensor device is arranged on a housing supporting the PTO shaft. As a result, vibrations transmitted from the PTO to the agricultural vehicle can be detected directly on the housing. In this case, the housing also provides a surface which is suitable to arrange a sensor element thereto.

According to one embodiment, the sensor device is screwed to the housing. Optionally, a bond can be made. Bolting provides the advantage that the sensor element can be pressed against the surface with a predefinable force, and that no aging of any adhesive interface occurs, and that no adhesive layer possibly attenuating the vibrations is required.

According to one embodiment, the sensor element is an acceleration sensor. It has been shown that by detecting acceleration values and determining vibrations based on the acceleration values, a mostly sufficiently accurate prediction of operating or overload states is possible. The acquisition and evaluation of acceleration measurements also provides the advantage that shocks and pulses can be detected on the attachment, which in addition to continuous, constant vibrations also cause a one-time shift of the attachment. This leaves e.g. Conclusions about the directional stability of the attachment to.

It has also been found that the accelerations applied by implements to the PTO often deviate significantly from the accelerations applied by the agricultural vehicle. Agricultural vehicles are usually well sprung and damped and have a particularly large mass, whereas implements are usually relatively light and less well muted.

Preferably, the accelerometer is adapted to detect accelerations in all three spatial directions. As a result, the accuracy of the analysis of the operating state can be increased compared to one- or two-dimensional measurements.

Preferably, the acceleration sensor is designed as a piezoelectric sensor, which can measure in a frequency range from 0.5 Hz to 12 kHz and can detect accelerations in a range of ± 50 g.

According to one exemplary embodiment, the sensor device is arranged next to a coupling of the power take-off shaft or an end flange of the power take-off shaft. This arrangement implies that the coupling and the connection are arranged close to each other, in particular that a free end of the PTO shaft is mounted in the region of the connection. As a result, a vibration can be tapped in a particularly direct manner. In other words, the accelerometer is located not only at the port, but also in the area of the interface of the PTO shaft to the attachment. Is preferred the PTO is stored directly at the interface. This makes it easier to distinguish between accelerations exerted by the agricultural vehicle and accelerations exerted by the implement.

Preferably, the sensor device is arranged on a stationary, non-rotating machine element. Optionally, the sensor device can also be arranged on a rotating machine element, in particular the end flange or the coupling.

According to one exemplary embodiment, the sensor device is arranged next to a bearing, in particular next to an inner or outer ring of the bearing, preferably a roller bearing, of the PTO shaft. The bearing is preferably a bearing which is in the region of the free end, i. is arranged in the region of the clutch of the PTO. As a result, a vibration can be detected without having to take into account the influence of several vibration damping components in a complex manner. The bearing may be supported in a PTO housing. The rolling bearing can be used here as a vibration transmitter. Different frequencies of the multiple order can be assigned to the pathogens of the individual implements. In this case, information about the (wear) state of the camp can be determined. This also allows for preventive machine maintenance.

According to one embodiment, the monitoring device has a control unit for setting an operating state of the agricultural vehicle and / or attachment. Based on the measured values, in particular acceleration measured values, of the sensor device, the control unit can ensure an active, preventive protection of the attachment or agricultural vehicle without necessarily requiring a slip clutch. For this purpose, the monitoring device, in particular the device preferably has an evaluation unit for evaluating the detected vibrations, which is in communication with the sensor device. Further, the monitoring device, in particular the device preferably also has at least one actuator for setting an operating state of the attachment or agricultural vehicle, in particular the PTO, or is coupled to such an actuator. The control unit is connected to the evaluation unit and is designed to control the at least one actuator such that the vibrations are reduced.

In this case, the control unit can be designed to check whether the vibrations are within predefinable limit values. If the limit value is exceeded, the control unit can output a warning signal and / or control a drive of the agricultural vehicle in such a way that the vibrations, in particular the amplitudes of the vibrations, are reduced. The monitoring device, in particular the device can also have a display and be designed to have a green area (with optimum or uncritical adjustment of the operating state), a yellow area (in the case of improvement, ie to be corrected operating state) and a red area (in critical operating state, eg in the range of natural frequencies).

Preferably, a plurality of limit values are stored in the control unit, which are each assigned to a particular type of attachment. In this case, the control unit is designed to mark a certain vibration measurement value as too high only if the occurring vibration is too high with respect to the respective attachment. Further preferably, the control unit has a memory in which limit values for a plurality of different implements are stored, and in which limits for the agricultural vehicle are also stored. The control unit can be designed to carry out two test steps before a warning signal is emitted or a control intervention by means of the at least one actuator takes place, namely first the check as to whether a limit value of the relevant attachment is exceeded, and then the check as to whether a limit value of the agricultural vehicle is exceeded ,

The control unit preferably has an oscillation map stored in the memory in which oscillation values of a respective attachment or of the agricultural vehicle are stored, in particular as a function of a load cycle. Speed state. As a result, the control unit can detect with good accuracy whether it is a damaging operating state, or whether the detected vibrations are typical of a current speed.

Preferably, the control unit is designed to compare the detected vibrations with predetermined resonance vibration values and to control the at least one actuator as a function of the distance of the detected vibrations from the resonance vibration values.

The resonant vibration values may be e.g. be predetermined by natural frequencies of the attachment and / or the agricultural vehicle.

Thanks to the combination of the sensor unit, in particular an accelerometer with the control unit can take place at any type of PTO, in particular engine, transmission and PTO a forward-looking adjustment of the operating condition, in particular because, for example, sufficient time remains to throttle the vehicle speed before an overload occurs, or because of sustained strong vibrations, eg particularly hard ground sections, the engine speed or driving speed can be lowered and increased again as the ground sections become softer. This not only improves the work result, but also protects the device. The utilization of the device and the vehicle can be improved, and harmful operating conditions can be avoided.

The aforementioned object is also achieved by an attachment or agricultural vehicle having a monitoring device according to the invention. If the monitoring device is arranged on the attachment, then it is preferably via a wired and / or wireless connection with the agricultural vehicle, in particular an actuator of the agricultural vehicle in contact or communication. In the event that the attachment itself also has actuators, the monitoring device is preferably (also) in communication with at least one of these actuators.

It has been found that use of a monitoring device according to the invention with a device having an electronic sensor device with a sensor element on an attachment and / or agricultural vehicle for detecting oscillations of the attachment and / or agricultural vehicle provides the advantage that operating or Overload conditions can be predicted in a simple manner and with sufficient accuracy, in particular by a course of the vibrations is evaluated.

It has been found that a use of a monitoring device according to the invention with a device which has an electronic sensor device with a sensor element designed as an accelerometer on an attachment and / or agricultural vehicle for detecting vibrations of the attachment and / or agricultural vehicle, in particular at a terminal of Implement and / or agricultural vehicle provides the advantage that operation or overload conditions can be predicted in a simple manner and with sufficient accuracy, in particular by the nature of the accelerations on a particular state of a soil is closed and the operating state of the implement and / or agricultural vehicle respective conditions is adjusted.

It has been found that a use of a monitoring device according to the invention with a device comprising an electronic sensor device and a control unit on an attachment and / or agricultural vehicle for detecting oscillations of the attachment and / or agricultural vehicle and for setting an operating state of the attachment and / or or agricultural vehicle provides the advantage that overloading can be largely avoided. The agricultural vehicle and / or attachment can be preemptively adjusted to avoid an overload condition. An overload then no longer occurs, or at least less frequently, and the processing of e.g. Farming can be done in a more efficient way

• – Erfassen eines Betriebszustands des Landwirtschaftsfahrzeugs und/oder Anbaugerätes, insbesondere an der Zapfwelle; bei welchem erfindungsgemäß vorgesehen ist, dass der Betriebszustand auf elektronische Weise durch Erfassen von Schwingungen, insbesondere Beschleunigungswerte, erfasst wird. Hierdurch kann mit einfachen Mitteln ein materialschonender Gebrauch bzw. ein bestimmungsgemäßer Einsatz von Geräten sichergestellt werden. Bevorzugt werden die Schwingungen an einem Anschluss der Zapfwelle erfasst.

The above-mentioned object is also achieved by a method for detecting an operating state of an agricultural vehicle and / or an implement which can be coupled to the agricultural vehicle via a power take-off shaft of the agricultural vehicle, with the step:

• Detecting an operating state of the agricultural vehicle and / or attachment, in particular at the PTO shaft; in which according to the invention it is provided that the operating state is detected electronically by detecting vibrations, in particular acceleration values. This can be ensured by simple means a material-friendly use or proper use of equipment. Preferably, the vibrations are detected at a connection of the PTO.

• – Erfassen von Beschleunigungswerten an einem Anschluss einer Zapfwelle des Anbaugeräts oder Landwirtschaftsfahrzeugs;
• – Ermitteln von Schwingungswerten auf Grundlage der Beschleunigungswerte;
• – Vergleichen der ermittelten Schwingungswerte mit vorgegebenen Resonanzschwingungswerten des Anbaugeräts oder Landwirtschaftsfahrzeugs und Ermitteln eines Abstands bzw. einer Abweichung der erfassten Schwingungen von den Resonanzschwingungswerten; und
• – Ansteuern mindestens eines Aktors des Anbaugeräts oder Landwirtschaftsfahrzeugs in Abhängigkeit des ermittelten Abstands.

The method can be developed for setting an operating state of the attachment and / or agricultural vehicle, and in particular have the following steps:

• - detecting acceleration values at a PTO connection of the attachment or agricultural vehicle;
• - determining vibration values based on the acceleration values;
• Comparing the determined vibration values with predetermined resonance vibration values of the implement or agricultural vehicle and determining a distance or deviation of the detected vibrations from the resonance vibration values; and
• - controlling at least one actuator of the attachment or agricultural vehicle depending on the determined distance.

Preferably, a course of the acceleration measured values is evaluated. If the acceleration measurement values increase, it is preferred to determine what the slope of the increase is, and from this the time is determined at which the Acceleration readings are likely to exceed a maximum value so that the operating state can be adjusted in a forward-looking manner.

Short description of the drawing

In the following description of the figures, the invention will be explained in more detail. Show it:

1 a schematic side view of a monitoring device according to an embodiment of the invention, which is arranged on an agricultural vehicle;

2 a schematic illustration of a monitoring device according to an embodiment of the invention, which is in communication with an actuator of an agricultural vehicle and an actuator of an attachment;

3 a schematic side view of a connection of a PTO of an agricultural vehicle, on which a monitoring device according to an embodiment of the invention is arranged; and

4 a schematic representation of an agricultural vehicle in a rear view, with a connection of a power take-off, on which a monitoring device according to an embodiment of the invention is arranged.

Detailed description of the drawing

In the 1 is a monitoring device 100 shown on an agricultural vehicle 1 is arranged and an electronic sensor device 21 in the form of an accelerometer, which is equipped with a device 20 the monitoring device 100 coupled, in conjunction with an actuator 23 stands. The sensor device 21 is at a connection 2 of the agricultural vehicle 1 arranged, wherein at the connection 2 a PTO 3 of the agricultural vehicle is stored. An attachment 10 is in a connection 12 of the attachment 10 by means of the PTO 3 or one with the PTO 3 connected drivetrain 3a with the attachment 10 coupled.

The sensor device 21 detects vibrations at the connection 2 , and the monitoring device 100 can by means of the actuator and / or an actuator of the agricultural vehicle an operating state of the attachment 10 to adjust. The vibrations are from the PTO 3 on the connection 2 transfer. The connection 2 is in close proximity to a free end or an end flange of the PTO shaft 3 arranged. The PTO 3 can be stored with its free end in a camp (not shown) in connection.

In the 2 is a monitoring device 100 shown which one device 20 with an electronic sensor device 21 in the form of an accelerometer, which is connected to a control unit 24 is coupled. The monitoring device 100 also has an evaluation unit 22 and an actor 23 on which with the control unit 24 are coupled. The device 20 is with an actor 1.1 an agricultural vehicle and an actuator 10.1 coupled to an attachment.

By means of the control unit 24 can the actors 1.1 . 10.1 be controlled to set an operating condition. The operating status can be determined via the evaluation unit 22 be evaluated. The evaluation unit 22 can be sent to the control unit 24 provide a signal that there is a critical operating condition at which an expected overload will occur or has already occurred. In response, the control unit may 24 For example, reduce the number of revolutions of a PTO or a powertrain.

In the 3 is a monitoring device 100 shown on an agricultural vehicle 1 is arranged and an electronic sensor device 21 in the form of an accelerometer, which is equipped with a device 20 the monitoring device 100 is coupled. The sensor device 21 is at a warehouse 6 for a PTO 3 of the agricultural vehicle 1 arranged, with a connection 2 of the agricultural vehicle mechanically with the warehouse 6 is coupled. In other words, the camp is supported 6 in connection 2 from. The PTO 3 ends in a free end, on which a clutch 4 is arranged, which has an end flange 5 having. The sensor device 21 is on the side of one through an axle of the agricultural vehicle 1 extending level, which points away from the vehicle center (as indicated by the arrow and the dashed line). In other words, the sensor device 21 as far as possible from a vehicle center and as close as possible to a rear or front end of the vehicle 1 ,

In the arrangement of the sensor device shown 21 accelerations can be recorded, which are transmitted via the bearing 6 be transmitted. The sensor device 21 is at the connection 2 and at the camp 6 arranged, in particular at a distance from the PTO shaft 3 which at least approximately the distance of an outer ring of the bearing 6 equivalent. By this close arrangement at the Zapfwellle 3 For example, accelerations can be detected particularly directly, ie, largely without the influence of any damping intermediate components. Optionally, the sensor device 21 even closer to the clutch 4 , in particular to the end flange 5 can be arranged, in particular to detect vibrations of an attachment even more direct.

In the 4 is an agricultural vehicle 1 shown which one connection 2 for a PTO 3 comprising a transmission housing 2a includes. An institution 20 has an electronic sensor device 21 on and is on the gearbox 2a right next to a warehouse 6 the PTO 3 arranged. This arrangement allows for detection of vibrations that occur over the bearing 6 on the case 2a be transmitted.

LIST OF REFERENCE NUMBERS

1

 Agricultural vehicle

1.1

 Actuator of agricultural vehicle

2

 connection

2a

 gearbox

3

 PTO, namely front or rear PTO

3a

 drive train

4

 clutch

5

 end flange

6

 camp

10

 attachment

10.1

 Actuator of the implement

12

 connection

20

 Facility

21

 electronic sensor device

22

 evaluation

23

 actuator

24

 control unit

100

monitoring device

Claims (10)

Monitoring device ( 100 ) for an agricultural vehicle ( 1 ) or for an agricultural vehicle via a power take-off ( 3 ) of the agricultural vehicle coupled implement ( 10 ), with a facility ( 20 ) for detecting an operating condition of the agricultural vehicle or implement; characterized in that the device ( 20 ) an electronic sensor device ( 21 ) with a sensor element for detecting vibrations of the agricultural vehicle or implement and at a connection ( 2 ; 12 ) of the PTO shaft is arranged. Monitoring device ( 100 ) according to claim 1, characterized in that the sensor device is mounted on a PTO shaft housing ( 2a ) is arranged. Monitoring device ( 100 ) according to claim 2, characterized in that the sensor device with the housing ( 2a ) is screwed. Monitoring device ( 100 ) according to one of the preceding claims, characterized in that the sensor element is an acceleration sensor. Monitoring device ( 100 ) according to one of the preceding claims, characterized in that the monitoring device ( 100 ) a control unit ( 24 ) for adjusting an operating state of the agricultural vehicle and / or attachment. Attachment ( 10 ) or agricultural vehicle ( 1 ) with a monitoring device ( 100 ) according to any one of the preceding claims. Use of a monitoring device ( 100 ) with a device ( 20 ) comprising an electronic sensor device ( 21 ) with a sensor element, on an attachment ( 10 ) and / or agricultural vehicle ( 1 ) for detecting vibrations of the attachment and / or agricultural vehicle. Use of a monitoring device ( 100 ) according to claim 7, wherein the sensor element is an accelerometer. Use of a monitoring device ( 100 ) according to claim 7 or 8, wherein an operating state of the attachment and / or agricultural vehicle by means of a control unit ( 24 ) of the institution ( 20 ) is set. Method for detecting an operating state of an agricultural vehicle ( 1 ) and / or one with the agricultural vehicle via a power take-off ( 3 ) of the agricultural vehicle coupled implement ( 10 ), comprising the step of: - detecting an operating state of the agricultural vehicle and / or attached implement; characterized in that the operating condition is detected electronically by detecting vibrations.

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