A mixer wagon with autonomous operation and system with such a wagon

Abstract

A mixing wagon (1) for loading one or more feed components to be mixed from a loading area and for distributing a feed mixture obtained from the mixed components and intended for farm animals, wherein the loading and distributing are carried out by moving the wagon (1) in a predetermined handling area having a lower stationary surface (S1), e.g. a floor or ground, at least one loading area, at least one mixture storage area accessible to farm animals for feeding, and at least one loading area (20) with at least one contactless energy transmission device (200) operatively connected to the electrical network, comprising: - a supporting frame (2); - a plurality of wheels (3) operatively connected to the supporting frame (2); - a collecting container (4) for one or more components of the food mixture and the resulting food mixture; - a plurality of sensors (9); - means (12) for positioning the wagon (1) in the transshipment area; - a variety of operating units (5, 6, 7, 8, ...), including: - a drive unit (5) for rotating the plurality of wheels (3); - a mixing unit (6) for mixing the components in the safety container (4) and for obtaining the food mixture; - a drive arrangement (10) comprising at least one electric motor (100) for operating the operating units (5, 6, 7, 8,...) and at least one accumulator (101) which is operatively connected to the at least one electric motor (100) for driving the latter; - a logical data processing unit (11) operatively connected to the plurality of operating units (5, 6, 7, 8,...), to the plurality of sensors (9) and to the positioning device (12), the same logical unit (11) implementing a computer program containing instructions to enable the automatic operation of the operating units (5, 6, 7, 8,...) in the absence of an operator on board the wagon (1) itself on the basis of data provided and / or sent at least by / to the positioning device (12) and by / to the plurality of sensors (9).

Description

Technical area

[0001] The present invention is generally applicable in the technical field of animal nutrition and, in particular, relates to an autonomously operating mixing wagon, a system comprising such a mixing wagon and a computer program implemented in the wagon. State of the art

[0002] In the animal feed industry, mixer wagons are particularly well-known for producing feed mixtures by blending various components into a uniform blend. This ensures that each animal receives a balanced diet and optimizes the quality of the produced meat and milk.

[0003] Well-known mixer wagons include operator-operated mixer wagons that are powered by a diesel engine or suitable electric motors.

[0004] However, all these mixer wagons have limited productivity and low flexibility, as they are necessarily tied to the constant presence of an operator responsible for their operation.

[0005] In addition, these mixers require constant intervention by the operator himself to refuel with diesel or to charge the batteries of the electric motors by manually connecting them to the power grid.

[0006] This leads to discontinuous production times, which has a negative impact on production times and subsequent costs. Description of the invention

[0007] The aim of the present invention is to at least partially overcome the disadvantages outlined above by providing a mixing wagon which enables a reduction in production costs.

[0008] Another objective is to provide a mixer wagon that enables maximization of production times.

[0009] Another goal is to provide a feed mixer with low environmental impact.

[0010] Another objective is to provide a mixing wagon that enables the production of mixtures with reduced recipe errors.

[0011] Another objective is to provide a mixer that allows maximizing the quality of the collected material.

[0012] These and other purposes, which will become more apparent hereinafter, are achieved by a mixer truck and / or a system and / or a computer program according to the provisions described, illustrated and / or claimed herein.

[0013] The dependent claims define advantageous embodiments of the invention. Brief description of the drawings

[0014] Further features and advantages of the invention will become clearer from the detailed description of a preferred, but not exclusive, embodiment of the invention, illustrated by way of non-limiting example with the aid of the attached drawings. Fig. 1 a schematic axonometric view of a mixer wagon 1, Fig. 2 a top view of the mixer wagon Fig. 1, Fig. 3 a side view of the mixer wagon Fig. 1, Fig. 4 a rear view of the mixer wagon Fig. 1, and Fig. 5 a bottom view of the mixer wagon from Fig. 1. Detailed description of some popular implementation examples

[0015] With reference to the accompanying figures, a mixing wagon 1 is described for loading one or more feed components to be mixed from a loading area and for distributing a feed mixture for farm animals obtained from the mixed components.

[0016] Possible components include various types of feed, silage, grain, concentrated feed and additives.

[0017] These measures can be carried out by moving the carriage 1 in a predefined movement area.

[0018] Of course, this area can also include the loading and distribution areas described above.

[0019] The handling area may be provided with a lower stationary surface SI, such as a floor or ground, at least one loading area for the feed components, i.e. the loading area, and at least one storage area for the mixture accessible to the livestock for feeding, i.e. the distribution area, which is provided, for example, with at least one feeding trough or at least one unloading hopper.

[0020] The handling area may also be equipped with at least one charging area 20 connected to the power grid and possibly a satellite data receiving station 21.

[0021] It goes without saying that if there is good satellite reception coverage in the area, the presence of the receiving station 21 is not necessary.

[0022] Advantageously, the charging area 20 may comprise an energy transmission device 200.

[0023] Preferably, the transfer device 200 may be positioned on a vertical column attached to the lower stationary surface S1, as shown in Fig. shown.

[0024] It is understood, however, that the transfer device 200 may be positioned horizontally on the lower stationary surface SI without thereby departing from the scope of the appended claims.

[0025] In a preferred embodiment, the charging area 20 may be inductive and the energy transfer device 200 may comprise a transfer coil 200', which may be made of copper or another conductive material and is capable of generating a magnetic field when an electric current flows through it, in a manner known per se.

[0026] For this purpose, the coil can be connected to the power grid in a ready-to-use state. A power converter unit can then be provided to convert the alternating current from the grid, for example, into high-frequency current for the coil.

[0027] It goes without saying that the transmission device 200 is configured accordingly, regardless of whether the charging system is magnetic resonance, electrical resonance, radio waves or laser beams.

[0028] Suitably, the mixing wagon 1 may comprise a support frame 2 known per se, which has a bottom side 2' facing the stationary surface S1 and an opposite top side 2".

[0029] Advantageously, the frame 2 may have a longitudinal extension along an X-axis and a width la determined according to the lateral regions of the frame 2 which project the most, measured along a Y-axis perpendicular to the X-axis.

[0030] For example, this width can be between 1.5 and 2 m.

[0031] The frame 2 may be connected to several wheels 3 to enable the movement of the carriage 1 on the surface SI.

[0032] Preferably, said wheels 3 can be distributed over two axles for all-wheel drive.

[0033] Preferably, both axles are steerable, equipped with at least one steering position or angle sensor and can be driven by a steering system that allows three different steering modes, namely steering of the front axle only, steering of both axles in concentric mode and steering of both axles in lateral movement mode.

[0034] It goes without saying that the wheels 3 can be connected to bridge axles by means of suitable hubs, wherein the axles are perpendicular to the X-axis and can be connected to the frame 2.

[0035] At least one of these axles can rotate about an axis parallel to the Y-axis to adapt to uneven terrain, allowing the three wheels connected to the same axle to tilt.

[0036] The carriage 1 may also comprise a safety container 4, a plurality of operating units, a drive unit 10, means 12 for positioning the carriage 1 in the environment, a plurality of sensors 9 and a data processing logic unit 11.

[0037] Preferably, the control of the above-mentioned steering system can be carried out via at least one electro-hydraulic valve controlled by the logic unit 11.

[0038] Advantageously, the operating units may comprise a drive unit 5 for rotating the wheels 3 and a mixing unit 6 for mixing the components in the tank 4.

[0039] Preferably, the container 4 may comprise one or more mixing screws 40, for example with a vertical axis, equipped with blades in the peripheral region to perform the function of chopping and mixing the components in order to obtain a homogeneous food mixture.

[0040] Advantageously, the safety container 4 may also be equipped with at least one counter-blade 41 to counteract the internal flow of the product and to facilitate the cutting and mixing of the products themselves.

[0041] Conveniently, some sensors 9 can be positioned in the safety container 4.

[0042] For example, there may be weight sensors positioned, for example, at the bottom of the tank 4 to measure the amount of each added component, speed sensors to monitor at least the rotation speed of the mixing screws 40, humidity sensors to measure the moisture content of the ingredients, temperature sensors, NIR sensors, and level sensors to detect the level of the material in the tank 4.

[0043] On the other hand, sensors 9 can be positioned on the frame 2, for example motion sensors 90, position sensors 91 for measuring the exact position of the cart 1 in the movement area, safety or proximity sensors 92 for detecting the presence of obstacles or people around the cart 1.

[0044] In addition, video surveillance systems with artificial intelligence algorithms connected to the logical unit 11 can be considered in the operational units.

[0045] In particular, the logic unit 11 can be operatively connected to the operating units, the sensors 9 and the positioning means 12 and execute a computer program with instructions enabling the automatic operation of the operating units themselves without the presence of an operator on board the trolley 1.

[0046] This will be possible through the exchange of data between the logical unit 11, the positioning means 12, the sensors 9 and the video surveillance systems, if present.

[0047] This data can therefore be used both as input and as output by the logical unit 11.

[0048] It goes without saying that other means for exchanging data with the logic unit 11 are also conceivable, which aim at autonomous operation of the vehicle 1, without thereby departing from the scope of protection of the appended claims.

[0049] In a preferred embodiment, the automatic control of the operating units can be carried out exclusively thanks to the instructions given by the logic unit 11 on board the carriage 1.

[0050] In another embodiment, the frame 2 may include a remote communication module such as WLAN, radio, Bluetooth or the like, which is connected to the logic unit 11 and can be connected to a remote computer accessible by an operator.

[0051] This enables remote control of the control units of car 1 as well as remote updating of the software installed in the logical unit 11.

[0052] Advantageously, the positioning means 12 may comprise a localization system 122, such as a satellite localization system or a mobile network-based localization system, equipped with at least one receiving antenna 1220 positioned on the frame 1.

[0053] Preferably, the tracking system 122 is a satellite tracking system having a pair of satellite receiving antennas 1220 positioned on the frame 1.

[0054] It goes without saying that if the transshipment area is equipped with a receiving station 21, the wagon localization system 122 with its antennas 1220 will be able to interact with it to integrate the satellite position data and thus improve the reliability of the localization of the wagon 1 in the transshipment area.

[0055] For example, the satellite positioning system 122 could be of the type GPS, GLONASS, Galileo, BeiDou or similar.

[0056] This satellite system 122 can operatively interact with the above-mentioned motion sensors 90, position sensors 91 and proximity sensors 92 to maximize the degree of accuracy of the data provided by the latter.

[0057] Furthermore, the implementation of the satellite system 122 may be particularly useful for locating wagon 1 in the area of ​​the open transshipment point.

[0058] In a preferred, but not exclusive, embodiment, the position sensors 91 may be based on the known LIDAR technology.

[0059] For this purpose, the positioning device 12 may comprise a remote sensing unit 120 comprising at least one LIDAR type sensor 91 and / or at least one radar type sensor connected to the satellite localization system 122.

[0060] This implementation could be particularly useful for locating wagon 1 in the part of the movement area defined within structures such as stables, loading or unloading areas covered by artificial structures such as roofs, canopies or similar.

[0061] Preferably, the operating units may comprise a loading unit 7 for loading the components into the safety container 4.

[0062] Advantageously, the loading unit 7 may comprise a conveyor belt 72 or another functionally equivalent transport device.

[0063] More preferably, the loading unit 7 may comprise a cutter 70 equipped with a cutting rotor cylinder 71, which is also equipped with blades for processing the components before they are loaded into the containment container 4.

[0064] It goes without saying that the loading unit 7 may also comprise other systems for receiving ensiled, loose or packaged components without thereby departing from the scope of the appended claims.

[0065] Even better, the cutting device 70 or other collection system is positioned at the inlet edge of the aforementioned conveyor belt 72.

[0066] Preferably, the cylinder 71 can be positioned parallel to the Y-axis and have a longitudinal development of length lu which, measured along the axis parallel to the Y-axis, substantially corresponds to the width la.

[0067] This measure enables shorter loading times for the components and reduces the number of lateral movements and maneuvers, as a larger surface area can be covered in a single pass.

[0068] In addition, it is possible to preserve the quality of the loaded components, as they can be processed by the 70 cutter in a shorter time, thus subjecting them to less stress and thus preserving their organoleptic properties.

[0069] In addition, the loading unit 7 can load the fresh components for each mix directly from the loading areas, thus avoiding pre-aeration and the associated oxidation or fermentation of the silage products.

[0070] More preferably, the operating units may comprise a discharge unit 8 for discharging the food mixture from the containment container 4 after production.

[0071] The unloading unit 8 may comprise a pair of side doors 81 positioned opposite the X-axis, behind and below the tank 4, and a distribution conveyor belt 82 positioned below the unloading doors 81 and parallel to the Y-axis and movable in both directions along a direction parallel to the same axis to facilitate unloading into the troughs or unloading hoppers.

[0072] In order to avoid any product remaining in the manger from previous feedings being crushed, the emptying unit 8 can be equipped with a movable, inclined deflection system that conveys the residual material to an area not touched by the wheels 3.

[0073] It goes without saying that the number of distributions will be minimal, resulting in a corresponding time saving, thanks to the dimensions of the containment vessel 4, as described above.

[0074] Preferably, the drive unit 10 may comprise one or more electric motors 100 designed to drive the individual operating units, so that no internal combustion engine is required, resulting in less environmental pollution and a less negative impact on the quality of the mixture.

[0075] Therefore, the drive unit 10 can operate entirely without combustion engines.

[0076] Advantageously, the drive unit 10 can comprise one or more accumulators 101, i.e. batteries, for supplying the electric motors 100.

[0077] It is therefore understandable that thanks to the above-mentioned electric motors 100, the mixer wagon 1 can be operated entirely electrically and no fuel is required.

[0078] More preferably, the drive unit 10 may comprise an inverter associated with each electric motor 100 to control its speed and operatively connected to the processing unit 11.

[0079] The aforementioned inverters allow the power of the electric motors 100 to be modulated moment by moment to adapt to demand. This increases the overall operating efficiency of the mixer wagon 1 and the autonomy of the battery 101, which has a positive impact on both operating costs and overall environmental impact.

[0080] The inverters can be electrically arranged between the accumulator 101 and the electric motors 100 in order to convert the direct current of the accumulator 101 into alternating current and thus supply the motors 100 with power.

[0081] Preferably, each electric motor 100 can be used to drive a corresponding one of the aforementioned operating units.

[0082] The independent operation of the individual operating units enables high efficiency of the mixing wagon 1.

[0083] In any case, the supply voltage of each accumulator 101 can be between 72 - 144 V DC, with a resulting power of the respective motor 100 of approximately 23 - 47 kW.

[0084] In the case of electric feed mixer wagons with on-board operators, these power and supply ranges cannot, of course, be used, as they would not be sufficient to operate the wagon itself.

[0085] A preferred range could include a supply voltage between 77 - 124 V DC and a power between 25 - 40 kW.

[0086] This preferential range allows significant savings in the cost of the motors 100, the accumulators 101, the wiring, the inverters and all the electrical components, as well as savings in installation costs, since the installation requirements, such as the cable cross-section and the dimensioning of the protection devices, are less stringent, resulting in savings in labor and material costs.

[0087] The power of each motor 100 can be about 31 kW and they can be powered by accumulators 101 with an electrical voltage of 96 V DC.

[0088] Furthermore, in the above-mentioned range, i.e. a supply voltage between 77 and 124 V and a power between 25 and 40 kW, the components can have smaller dimensions and a lower weight, so that a containment vessel 4 of considerable dimensions can be present.

[0089] The latter can actually have a capacity of at least 6 m 3 , preferably 6 - 15 m 3 and even better 7 - 10 m 3 have.

[0090] It goes without saying that such a size of the tank 4 helps to reduce the need to repeat the loading and mixing process of the components.

[0091] Fewer charging cycles inevitably mean fewer opportunities for the accumulation of dosing errors.

[0092] All this can be reflected in a proper feed formulation for farm animals, avoiding nutrient imbalances, digestive and health problems, and increasing feed efficiency.

[0093] Such a tank 4 also provides the necessary space for the movement of the components during mixing, allowing the augers to work more efficiently and ensuring that all ingredients are evenly distributed in the ration and their homogeneity is maintained for a long time.

[0094] Preferably, the operating units may comprise a hydraulic service group for driving one or more hydraulic actuators, which in turn comprise a pump driven by a corresponding electric motor 100.

[0095] Some of the aforementioned hydraulic actuators may be part of one or more of the operating units to perform corresponding specific functions.

[0096] For example, they can operate the conveyor belts of the loading units 7 and / or unloading units 8 as well as the power steering of the drive unit 5.

[0097] Advantageously, the trolley 1 may comprise a contactless charging unit 13 positioned on the frame 2 and electrically connected to the one or more accumulators 101.

[0098] For example, the charging unit 13 could be operated by induction, magnetic resonance, electrical resonance, radio waves or laser beams.

[0099] However, the charging unit 13 may include a power receiving device 130 adapted to receive power from the power transmitting device 200.

[0100] Therefore, the receiving device 130 is configured according to the selected contactless charging type.

[0101] By choosing contactless charging, problems related to dirt in the charging areas, which could affect the charging process itself, as well as residual risks of electrical contact or short circuit due to the presence of electrical contacts, can be avoided.

[0102] Based on the above example, the charging unit 13 may be inductive and the receiving device 130 may comprise a receiving coil 130' positioned on and connected to the rear side 1P of the cart 1.

[0103] It goes without saying that when the transmitting device 200 is positioned horizontally on the lower stationary surface SI, the receiving coil 130' can be positioned, for example, on the lower surface 2' of the frame 2.

[0104] When the processing unit 11 detects a low charge in the accumulator 101, it can activate the drive unit 5 to move the carriage 1 towards a loading area 20, and the sensors 9 and the positioning means 12 can ensure the correct positioning of the carriage 1 so that the coil 130' is aligned with the transmission coil 200', as shown in particular in Fig. shown.

[0105] In this way, it is possible to enable mutual inductive coupling between the coils 130' and 200' and to enable recharging of the accumulator 101.

[0106] For this purpose, the charging unit 13 may also comprise a rectifier and / or a DC / DC converter and / or a control circuit electrically connected between the coil 130 and the accumulator 101 to convert the induced alternating current into direct current that can be used to charge the accumulator 101.

[0107] From an operational point of view, the sensors 9 and the positioning means 12 can send data to the logic unit 11, which can act accordingly on the operating units thanks to the installed software.

[0108] For example, the logic unit 11 can enable the movement of the trolley 1 by actuating the drive unit 5, it can start the mixing of the components by actuating the unit 6 when the weight sensors exceed a certain threshold, it can start the loading from the loading area by actuating the loading unit 7 when the weight sensors detect that there is no material in the container 4, it can start the unloading into the distribution area by actuating the unloading unit 8 when the level sensors exceed a predetermined threshold.

[0109] It goes without saying that all this can be ensured by the synergy of the data received at least by the individual sensors 9 and the positioning means 12, the processing of which can lead to a consequent movement in the movement area of ​​the carriage 1 in the directions of interest.

[0110] It is therefore understood that another aspect of the invention may relate to a computer program installed in the logic unit 11 of the trolley 1, the instructions of which are designed to enable the automatic functioning of the operating units thanks to the data acquired by the sensors 9 and the positioning means 12.

[0111] From the above, it can be seen that such instructions can correlate the actuation of a respective operating unit when the values ​​detected by the sensors 9 are higher or lower than a predetermined threshold value.

[0112] Furthermore, a group of instructions may be related to the movement of the carriage 1 in the movement area, thanks to the data provided at least by the positioning means 12 and by the sensors 9, in particular the movement sensors 90 and / or position sensors 91 and / or proximity sensors 92.

[0113] These values ​​can also be compared with corresponding threshold values ​​to detect movements in the range of motion.

[0114] Another aspect of the invention may relate to a system 1000 comprising the cart 1 as described above, which is equipped with an induction charging unit 13 and one or more induction charging areas 20 as described above.

[0115] The present invention may comprise various similar or identical parts and / or elements. Unless otherwise stated, similar or identical parts and / or elements are designated by a single reference numeral. The described technical features apply to all similar or identical parts and / or elements.

[0116] The invention is capable of numerous modifications and may fall within the scope of the appended claims. All details may be replaced by other technically equivalent elements, and the materials may be varied as needed, without departing from the scope of the invention as defined in the appended claims.

Claims

[1] A mixing wagon (1) for loading one or more feed components to be mixed from a loading area and for distributing a feed mixture obtained from the mixed components and intended for farm animals, wherein the loading and distributing are carried out by moving the wagon (1) in a predetermined handling area having a lower stationary surface (S1), e.g. a floor or ground, at least one loading area, at least one mixture storage area accessible to farm animals for feeding, and at least one loading area (20) with at least one contactless energy transmission device (200) operatively connected to the electrical network, comprising: - a supporting frame (2); - a plurality of wheels (3) operatively connected to the supporting frame (2); - a collecting container (4) for one or more components of the food mixture and the resulting food mixture; - a plurality of sensors (9); - means (12) for positioning the wagon (1) in the transshipment area; - a variety of operating units (5, 6, 7, 8, ...), including: - a drive unit (5) for rotating the plurality of wheels (3); - a mixing unit (6) for mixing the components in the safety container (4) and for obtaining the food mixture; - a drive arrangement (10) comprising at least one electric motor (100) for operating the operating units (5, 6, 7, 8,...) and at least one accumulator (101) which is operatively connected to the at least one electric motor (100) for driving the latter; - a logical data processing unit (11) operatively connected to the plurality of operating units (5, 6, 7, 8,...), to the plurality of sensors (9) and to the positioning device (12), the same logical unit (11) implementing a computer program containing instructions to enable the automatic operation of the operating units (5, 6, 7, 8,...) in the absence of an operator on board the wagon (1) itself on the basis of data provided and / or sent at least by / to the positioning device (12) and by / to the plurality of sensors (9). [2] A trolley according to any one of the preceding claims, wherein the chassis (2) comprises a remote communication module connectable to the logic processing unit (11) and to a remote computer accessible to an operator. [3] A trolley according to any one of the preceding claims, wherein the positioning means (12) comprise a localization system (122) comprising at least one receiving antenna (1220) positioned on the frame (2) for localizing the trolley (1) in the handling area. [4] A vehicle according to the preceding claim, wherein the positioning system (122) is a satellite positioning system. [5] Cart according to claim 3 or 4, wherein the plurality of sensors (9) comprises at least one motion sensor (90) and / or at least one position sensor (91) and / or at least one proximity sensor (92), wherein the at least one motion sensor (90) and / or the at least one position sensor (91) and / or the at least one proximity sensor (92) is operatively connected to the localization system (122). [6] A vehicle according to any one of claims 3 to 5, wherein the position sensors (91) are based on LIDAR technology, wherein the positioning device (12) comprises at least one remote sensing unit (120) based on LIDAR technology and having the at least one position sensor (91), wherein the at least one remote sensing unit (120) is operatively connected to the localization system (122). [7] Cart according to one of the preceding claims, comprising at least one contactless charging unit (13) comprising at least one energy receiving device (130) configured to charge the at least one accumulator (101). [8] A wagon according to the preceding claim, wherein the transmission device (200) comprises at least one transmission coil (200') operatively connected to the power grid, wherein the at least one charging unit (13) is inductive, the at least one energy receiving device (130) comprises at least one receiving coil (130'), and the logic unit (11) controls the movement of the wagon (1) on the basis of the data provided by the positioning means (12) corresponding to the at least one loading area (20) in order to align the at least one receiving coil (130') with the at least one transmission coil (200') to enable their mutual inductive coupling and to allow the recharging of the at least one accumulator (101). [9] Cart according to one of the preceding claims, wherein the at least one accumulator (101) supplies the at least one motor (100) with a voltage between 72 - 144 V, wherein the at least one motor (100) has a power between 23 - 47 kW, wherein in particular the at least one accumulator (101) supplies the at least one motor (100) with a voltage between 77 - 124 V, wherein the latter has a power between 25 - 40 kW. [10] A trolley according to any one of the preceding claims, wherein the supporting frame (2) extends along a first axis (X) and has a predetermined width (la) identified along a second axis (Y) substantially perpendicular to the first axis (X), wherein the plurality of operating units (5, 6, 7, 8,...) comprise at least one load unit (7) comprising a cutter (70) having a cutting rotor cylinder (71) with a length (lu) substantially equal to the width (la) of the frame (2). [11] Car according to one of the preceding claims, wherein the safety tank (4) has a capacity of at least 6 m 3, preferably 6 - 15 m 3, more preferably 7 - 10 m 3 has: [12] Car according to one of the preceding claims, wherein the drive unit (10) is free of internal combustion engines. [13] A system (1000) for loading one or more feed components to be mixed from a loading environment and for distributing a feed mixture obtained from the mixed components and intended for livestock in a predetermined handling area having a lower stationary surface (SI), e.g. a floor or ground, at least one loading area, at least one mixture storage area accessible to livestock for feeding, and at least one loading area (20) with at least one contactless energy transfer device (200) operatively connected to the power grid, comprising: - a mixing wagon (1) according to claim 7 or 8; - at least one charging area (20) with at least one contactless energy transmission device (200) which is operatively connected to the electrical network. [14] A computer program comprising instructions which, when executed by the data processing unit (11) of a mixer wagon (1) according to one or more of claims 1 to 12, cause the data processing unit (11) to enable the automatic operation of the operating units (5, 6, 7, 8,...) in the absence of an operator on board the wagon (1) itself on the basis of data provided and / or sent at least from / to the positioning device (12) and from / to the plurality of sensors (9).

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