Harvester with grain loss sensor and integrated harvesting attachment

Description

[0001] The present invention relates to a harvesting attachment for harvesting crops growing in rows and to a self-propelled agricultural machine with such a harvesting attachment, wherein the harvesting attachment has several picking units and each picking unit has at least two picking rollers for separating the crop from the supporting part of the plant, and wherein the harvesting attachment has at least one grain loss sensor for detecting grain loss from the crop separated from the supporting part of the plant. The invention further relates to the harvesting attachment for such a self-propelled agricultural machine.

[0002] CN109548472A discloses a control system for a self-propelled combine harvester that adjusts the rotational speed of the picking rollers of a corn header depending on the sensor-detected cob loss at the corn header. This is intended to minimize cob losses.

[0003] EP 2 681 984 B1 relates to a combine harvester with a header consisting, among other things, of a reel, a cutting table equipped with a cutterbar, and a header trough. The rotary-driven reel has several support stars arranged at intervals on a reel shaft, as well as support beams with conveying tines guided on these stars, and is guided on the header trough by support arms, being at least height-adjustable relative to the header trough and the cutting table located in front of it.The combine harvester also features a sensor for determining the actual height of the reel, an inclined conveyor connected to the header trough, a threshing and separating unit downstream of this conveyor in the direction of crop flow, and a control unit connected to the sensor and at least one transducer for recording harvesting conditions of the combine harvester and to actuators for adjusting the reel height. The at least one transducer is designed to detect fluctuations in crop flow in at least one conveying element downstream of the header and / or to detect crop height and / or to detect crop losses.

[0004] EP 2 702 855 B1 relates to a corn head row unit with a first and a second longitudinally extending stripper plate, which are mounted on a frame and have opposing stripping edges that form a gap between them. The frame further comprises an adjustment device that functionally connects the frame and at least one of the first and second stripper plates to selectively and laterally move at least one of the first and second stripper plates relative to the other stripper plate in order to change the width of the gap. A loss detection device is functionally connected to the frame to enable the measurement of corn kernels lost as a result of pulling corn stalks through the gap to separate corn ears from the stalks.

[0005] EP 3 014 973 B1 relates to a header for a combine harvester, wherein the header comprises a plurality of harvesting units, the harvesting units being configured to separate corn ears from corn stalks. Each of the harvesting units comprises a deck plate assembly and an actuator assembly configured to set the width of a stem intake channel by adjusting the position of at least one deck plate of the deck plate assembly. The header further comprises a core sensor for generating a signal representative of the presence of kernels that have detached from the corn ears, and a control unit for receiving the signal from the core sensor and generating an actuator control signal based on this signal to control the actuator assemblies, thereby controlling the width of the stem intake channels.

[0006] EP 3 284 334 B1 relates to a system for detecting grain losses for an agricultural harvesting machine, wherein at least one heat detection device is attached to a harvesting head of the agricultural harvesting machine and records infrared images of the ground. A control unit uses these infrared images to detect pre-harvest and harvest losses by identifying a temperature difference or a characteristic heat difference between the pre-harvest losses, the harvest losses, and the ground. The control unit can communicate with or be integrated into a yield monitor to provide an operator of the agricultural harvesting machine with information about pre-harvest and harvest losses.

[0007] US 2018 / 139902 A1 proposes the addition of further rollers to a harvesting header above the covers used to conceal the picking rollers. Unlike the picking rollers, these additional rollers serve to guide the crop horizontally towards the rear of the harvesting header, specifically towards a transverse auger, thereby compensating for the movement, particularly the speed, of the self-propelled agricultural machine equipped with the harvesting header.

[0008] The present invention is based on the objective of providing an improved or at least an alternative embodiment of a self-propelled agricultural machine and / or a harvesting attachment, in particular providing a reduction in grain losses.

[0009] This problem is solved according to the invention by the subject matter of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0010] According to the invention, a harvesting attachment and a self-propelled agricultural machine equipped with the harvesting attachment were provided, wherein the harvesting attachment for harvesting crops grown in rows of plants has several picking units and each picking unit has two picking rollers for separating the crop from a part of the plant carrying the crop (4), two conveyor chains for conveying the crop and a chopping device, wherein the harvesting attachment has at least one grain loss sensor for detecting grain loss of lost grains of the crop separated from the part of the plant carrying the crop.

[0011] According to the invention, the harvesting attachment or the self-propelled agricultural machine has a control and / or regulating device which is designed and configured to control the picking roller speed of all picking rollers of all picking units of the harvesting attachment. to adjust, control and / or regulate depending on the grain loss detected by the grain loss sensor, but independently of the rotational speeds of other components of the harvesting attachment and in particular independently of the rotational speed of the conveyor chains.

[0012] The present invention is based on the general concept that the self-propelled agricultural machine, in particular a self-propelled combine harvester, has a control and / or regulating device designed and configured to adjust, in particular to control and / or regulate, the picking roller speed of at least one picking unit of the header depending on the grain loss detected by the grain loss sensor. Particularly under changing field conditions, adjusting, in particular controlling and / or regulating, the picking roller speed can reduce grain loss. The picking roller speed of at least one picking unit of the header can be adjusted by means of a gearbox, in particular with four gears, and / or by means of a device for stepless speed adjustment, in particular a header variator.

[0013] The harvesting header has several picking units, each picking unit comprising two picking rollers, two conveyor chains, and a chopping device. The control and / or regulating device is designed and configured to adjust, and in particular to control and / or regulate, the picking roller speed of all picking rollers of all picking units independently of the speeds of other components of the harvesting header, in particular independently of the speed of the conveyor chains and / or independently of the speed of the chopping devices and / or independently of the speed of the transverse auger.

[0014] The self-propelled agricultural machine can have several grain loss sensors assigned to different picking units of the harvester header. It may be possible to uniformly control and / or regulate the picking roller speeds of all picking units of the harvester header based on the grain loss detected by the grain loss sensors.

[0015] The self-propelled agricultural machine can be designed and equipped to display, in particular visually, the grain loss detected by the grain loss sensor to the operator in a cab, so that the operator can specify and / or input an optimal picking roller speed to the control and / or regulating device using the machine's operating components. This can include, in particular, reducing and / or lowering the picking roller speed. Alternatively or additionally, the control and / or regulating device can automatically determine an optimal picking roller speed, in particular independently of the operator, and adjust, in particular control and / or regulate, this determined picking roller speed for at least one picking roller of at least one picking unit of the harvesting attachment.

[0016] In an advantageous embodiment of the solution according to the invention, the grain loss sensor of the harvesting header is arranged in such a way that lost grains impact the grain loss sensor, and the grain loss sensor is designed and configured to detect grain loss depending on the impact of the lost grains. When the lost grains impact the grain loss sensor, the impact generates a mechanical effect on the grain loss sensor, which is designed and configured to detect this mechanical effect and convert it into an electrical grain loss signal, particularly for the control and / or regulating device.

[0017] In an advantageous further development of the solution according to the invention, it is provided that the self-propelled agricultural machine and / or the harvesting attachment has at least one moisture sensor for detecting the moisture content of the harvested crop separated from the supporting plant part, wherein the control and / or regulating device is provided and configured to adjust the picking roller speed of all picking rollers of all picking units depending on the grain loss detected by the grain loss sensor and the moisture content of the harvested crop detected by the moisture sensor, in particular to adjust such that a higher picking roller speed is set for moist harvested crop, while a lower picking roller speed is set for dry harvested crop, in particular in comparison to the higher picking roller speed.

[0018] In an advantageous further development of the solution according to the invention, the control and / or regulating device is provided and configured to reduce the picking roller speed of a picking roller of at least one picking unit of the harvesting header in order to reduce the grain loss detected by the grain loss sensor. For this purpose, the control and / or regulating device can be provided and configured to determine and / or implement an optimal and / or maximum reduction of the picking roller speed of a picking roller, depending on the grain loss detected by the grain loss sensor.

[0019] In an advantageous embodiment of the solution according to the invention, the grain loss sensor of the harvester header is arranged between two picking units of the harvester header. The picking rollers of a picking unit have picking roller axes of rotation aligned parallel to each other, which are in particular aligned parallel to the direction of travel of the harvester header. All picking rollers of all picking units have picking roller axes of rotation aligned parallel to each other, which are in particular aligned parallel to the direction of travel of the harvester header. A transverse axis with respect to the harvester header is aligned transversely and / or perpendicularly to the direction of travel of the harvester header. The direction of travel of the harvester header can correspond to the direction of travel of the self-propelled agricultural machine when the self-propelled agricultural machine is traveling straight ahead.Alternatively or additionally, the transverse axis of the harvesting attachment is aligned transversely and / or perpendicularly to the picking roller's axis of rotation. Furthermore, the harvesting attachment may have at least one transverse auger. The transverse auger may have an axis of rotation that is aligned transversely and / or perpendicularly to the picking roller's axis of rotation. Alternatively or additionally, the axis of rotation of the transverse auger may be aligned transversely and / or perpendicular to the direction of travel of the harvesting attachment. Alternatively or additionally, the axis of rotation of the transverse auger may be aligned parallel to the transverse axis.

[0020] The grain loss sensor of the harvester header can be positioned completely and / or partially between two picking units of the harvester header with respect to the transverse axis. Alternatively or additionally, the grain loss sensor of the harvester header can be positioned completely in front of the transverse auger with respect to the direction of travel of the harvester header.

[0021] In an advantageous embodiment of the solution according to the invention, at least one picking unit has at least one conveyor chain for conveying the harvested crop, which is designed and configured to feed any lost grains to the grain loss sensor. If no lost grains occur, the harvested crop passes completely to the transverse screw conveyor and then to a conveyor, in particular an inclined conveyor. However, if lost grains do occur in a picking unit of the harvesting attachment, the conveyor chain is designed and configured to feed the lost grains to the grain loss sensor, in particular by means of a flow mechanism.

[0022] In an advantageous embodiment of the solution according to the invention, each conveyor chain is assigned a grain loss sensor. In other words, it can be provided that two grain loss sensors of the harvesting header are arranged between each pair of picking units. Furthermore, it can be provided that a partition is formed between these two grain loss sensors between the two picking units of the harvesting header. The partition can be designed such that the grain loss sensor only receives data on grain losses from the conveyor chain that is closest to it with respect to the transverse axis. This makes it possible, for example, to determine the grain losses for each conveyor chain and thereby achieve separate control of the picking units with respect to the picking roller speed.

[0023] In an advantageous embodiment of the solution according to the invention, the grain loss sensor includes an impact plate for detecting grain loss. The impact plate can be arranged in the harvester header such that lost grains impact the plate with an impact force before leaving the header. This makes it possible to accurately determine the grain loss caused by the harvester header, independent of environmental influences on the header.

[0024] In an advantageous embodiment of the solution according to the invention, the grain loss sensor is configured as an impact plate scale, and / or the grain loss sensor comprises a piezoelectric sensor, and / or the grain loss sensor comprises a capacitive sensor, and / or the grain loss sensor comprises an inductive sensor. In particular, an impact plate of the grain loss sensor can comprise at least one piezoelectric sensor, and / or at least one capacitive sensor, and / or at least one inductive sensor.

[0025] In an advantageous further development of the solution according to the invention, it is provided that the grain loss sensor has an impact plate which is designed and configured to detect the impact energy of lost grains of the grain loss by means of a mechanical change and / or mechanical deflection of the impact plate, wherein the grain loss sensor is designed and configured to determine the grain loss by means of the mechanical change and / or mechanical deflection of the impact plate.

[0026] Furthermore, the invention relates to a harvesting header for a self-propelled agricultural machine. This harvesting header can have at least one and / or more of the features mentioned above as well as those mentioned below. The harvesting header according to the invention for harvesting crops growing in rows for a self-propelled agricultural machine has several picking units, each picking unit having at least two picking rollers for separating the crop from the supporting plant part, and at least one grain loss sensor of the harvesting header being arranged between two picking units of the harvesting header.

[0027] In an advantageous further development of the solution according to the invention, it is provided that at least one picking unit has at least one conveyor chain for conveying the harvested crop, which is designed and equipped to supply lost grains to the grain loss sensor, and / or that each conveyor chain is assigned a grain loss sensor.

[0028] In an advantageous further development of the solution according to the invention, it is provided that the grain loss sensor of the harvesting attachment is arranged in the harvesting attachment in such a way that lost grains of the grain loss impact on the grain loss sensor, and that the grain loss sensor is provided and configured to detect the grain loss depending on the impact of the lost grains.

[0029] In an advantageous further development of the solution according to the invention, it is provided that the grain loss sensor has an impact plate for detecting the grain loss.

[0030] In an advantageous further development of the solution according to the invention, it is provided that the grain loss sensor forms an impact plate scale, and / or that the grain loss sensor has a piezoelectric sensor, and / or that the grain loss sensor has a capacitive sensor, and / or that the grain loss sensor has an inductive sensor.

[0031] In an advantageous further development of the solution according to the invention, it is provided that the harvesting attachment has a control and / or regulating device which is designed and configured to adjust, in particular to control and / or regulate, a picking roller speed of a picking roller of at least one picking unit as a function of the grain loss detected by means of the grain loss sensor.

[0032] In an advantageous embodiment of the solution according to the invention, the control and / or regulating device is designed and configured to determine the non-grain content and / or the net grain content (NHC / MOG) as a function of the picking roller speed of the harvesting header. This determination can be carried out by measuring the non-grain content using sensors. Alternatively or additionally, the control and / or regulating device can include a data set containing measurement data regarding the non-grain content, particularly as a function of the picking roller speed and / or the plant species, so that the control and / or regulating device can determine the non-grain content using this data set as a function of the picking roller speed of the harvesting header.The control and / or regulating device can be designed and configured to allow the operator of the self-propelled agricultural machine to specify the picking roller speed of the harvesting header, and the control and / or regulating device can provide the operator with information about the future non-grain content as a function of the picking roller speed, particularly via a display signal. It can also be provided that the operator of the self-propelled agricultural machine defines a target using a preset strategy, and the picking roller speed is then controlled and / or regulated accordingly by the control and / or regulating device.

[0033] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0034] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0035] They show, schematically, Fig. 1 a self-propelled agricultural machine according to the invention with a harvesting attachment in a top view, Fig. 2 the harvesting attachment according to the invention in a perspective top view, Fig. 3 a section of the Fig. 2 in a perspective underside view, and Fig. 4 a schematic setup regarding the control and / or regulation of the harvesting attachment.

[0036] The Fig. 1Figure 1 shows a top view of a proposed self-propelled agricultural machine 1, which in this example is a self-propelled combine harvester. The self-propelled agricultural machine 1 has a harvesting header 2 for harvesting crop 4, wherein the crop 4 is formed and arranged in several spaced-apart rows 3. Such crop 4 formed in rows 3 could, for example, be corn. The harvesting header 2 is oriented with respect to the direction of travel. FRThe harvesting attachment 2 is arranged at the front of a conveyor 18 of the self-propelled agricultural machine 1, in particular detachably. This harvesting attachment 2 serves to separate and collect the harvested crop 4, wherein the separated and collected crop 4 is fed via the conveyor 18 to several other working elements of the self-propelled agricultural machine 1 for further processing (not shown).

[0037] The harvesting attachment 2 has several stem dividers 15 and 16, wherein the stem dividers 16 and / or 15 subdivide a collection area of ​​the harvesting attachment 2 into several collection areas 17. Between each pair of adjacent stem dividers 16 and / or 15, there is a separation opposite to a direction of travel. FRA picking unit 5 of the harvesting attachment 1 is arranged below. Each of these picking units 5 has two covers 20, in particular two housing covers, and is at least partially covered by them. While in the Fig. 1 to the left of the direction of travel FR Considering these covers 20 are shown, the picking units 5 are on the right-hand side of the direction of travel. FR so semi-transparent it appears as if the covers 20 were not present.

[0038] Each picking unit 5 of the harvesting attachment 1 has at least two picking rollers 6 and is designed to separate the harvested crop 4 from the plant part bearing this crop, in particular the stem. The base bodies of these picking rollers 6 can be designed as threaded spindles, in particular with threads and / or with a cylindrical base body.

[0039] A first picking roller 6 of a picking unit 5 is arranged under a first cover 20, while a second picking roller 6 of this picking unit 5 is arranged under a second cover 20. The picking rollers 6 of a picking unit 5 form counter-rotating picking rollers 6 to enable the separation of the harvested crop 4 from the supporting part of the plant.

[0040] The picking rollers 6 of a picking unit 5 have picking roller pivot axes 11 aligned parallel to each other, which are in particular aligned parallel to the direction of travel F of the harvesting header 2. In particular, all picking rollers 6 of all picking units 5 can have picking roller pivot axes 11 aligned parallel to each other, which are in particular aligned parallel to the direction of travel F of the harvesting header 2. A transverse axis Q with respect to the harvesting header 2 is aligned transversely and / or perpendicularly to the direction of travel F of the harvesting header 2. The direction of travel F of the harvesting header can correspond to the direction of travel of the self-propelled agricultural machine 1 if the self-propelled agricultural machine 1 is traveling straight ahead. Alternatively or additionally, the transverse axis Q with respect to the harvesting header is aligned transversely and / or perpendicularly to the picking roller pivot axis 11.The transverse axis Q can be shifted relative to the direction of travel F, in particular along the direction of travel F or opposite to the direction of travel F.

[0041] Furthermore, the harvesting header 2 can have at least one transverse auger 13. The transverse auger 13 can have a transverse auger pivot axis 12, which is oriented transversely and / or perpendicularly to the picking roller pivot axis 11. Alternatively or additionally, the transverse auger pivot axis 12 can be oriented transversely and / or perpendicularly to the direction of travel F of the harvesting header 2. Alternatively or additionally, the transverse auger pivot axis 12 can be oriented parallel to the transverse axis Q. The transverse auger 13 and / or the picking units 5 can be arranged at least partially on a machine frame 14 of the harvesting header 2.

[0042] The harvesting attachment 2 features according to Figure 1The harvesting header 2 is equipped with at least one grain loss sensor 7 for detecting grain loss from the harvested crop 4 separated from the supporting plant part. The grain loss sensor 7 of the harvesting header 2 is arranged at least partially between two picking units 5 of the harvesting header 2 with respect to the transverse axis Q. For the sake of simplicity, in Figure 1Only a single grain loss sensor 7 is shown as an example; however, it is within the scope of the invention that a grain loss sensor 7 is positioned between each adjacent picking unit 5, so that the harvesting header 2 accommodates a plurality of grain loss sensors 7. The grain loss sensor 7 of the harvesting header 2 is arranged in the harvesting header 2 such that lost grains impact the grain loss sensor 7, the grain loss sensor 7 being designed and configured to detect grain loss depending on the impact of the lost grains. For this purpose, the grain loss sensor 7 of the harvesting header 2 is arranged between two, in particular between two immediately adjacent, picking units 5 of the harvesting header 2. Additionally, the grain loss sensor 7 of the harvesting header 2 is arranged, in particular completely, in front of the transverse auger 13 with respect to the direction of travel F of the harvesting header 2.Although not shown in the figures, several picking units 5 can each be assigned a grain loss sensor 7.

[0043] As in the Fig. 2 As indicated, each picking unit 5 has at least two conveyor chains 9 for conveying the harvested crop 4. These conveyor chains 9 are arranged above the picking rollers 6 and below the covers 20. According to the Fig. 3According to the invention, each picking unit 5 has at least one chopping device 22, which in the exemplary embodiment is arranged below the picking rollers 6. Using maize as an example of the crop 4, maize stalks are pulled towards the ground through a picking gap by the picking rollers 6 in the intake area, whereby the crop 4 in the form of the kernel is separated from the maize stalk by the conveyor chains 9 and the maize stalk is chopped by the chopping device 22. The conveyor chains 9 are additionally designed to feed any lost kernels from the kernel loss to the kernel loss sensor 7.

[0044] As in the Fig. 2 and 3As indicated, the grain loss sensor 7 can have an impact plate 10 for detecting grain loss. The impact plate 10 can be designed and configured to detect the impact energy of lost grains by means of a mechanical change and / or mechanical deflection of the impact plate 10, wherein the grain loss sensor 7 is designed and configured to determine the grain loss by means of the mechanical change and / or mechanical deflection of the impact plate 10. Furthermore or additionally, the grain loss sensor 7 can form an impact plate scale, and / or a piezoelectric sensor, and / or a capacitive sensor, and / or an inductive sensor. In addition to an impact plate 10, the grain loss sensor 7 can also have a deflection plate 19 to guide lost grains from the respective conveyor chain 9 to the impact plate 10.The conveyor chains 9 can move along the indicated directions of movement 21.

[0045] The Fig. 4 Figure 1 shows a schematic diagram relating to the control and / or regulation of the harvesting attachment 2. The self-propelled agricultural machine 1 comprises a control and / or regulation device 8, which is designed and configured to adjust the picking roller speed of a picking roller 6 of at least one picking unit 5 of the harvesting attachment 2 depending on the grain loss detected by the grain loss sensor(s) 7, so that the grain loss detected by the grain loss sensor(s) 7 is reduced, wherein in Figure 4 For the sake of simplicity, only one grain loss sensor 7 is shown again. The control and / or regulating device 8 can also be part of the harvesting attachment 2, as exemplified in the Fig. 4as indicated. Alternatively, the control and / or regulating device 8 can be spaced apart from the harvesting attachment 2 and arranged in a different position in the self-propelled agricultural machine 1.

[0046] The control and / or regulating device 8 can be designed and configured to control and / or regulate the picking roller speed of all picking rollers 6 of all picking units 5 of the harvesting header 2, in particular simultaneously. Furthermore, the control and / or regulating device 8 can be designed and configured to control and / or regulate all picking rollers 6 of all picking units 5 of the harvesting header 2 with a uniform picking roller speed, in particular simultaneously.

[0047] The control and / or regulating device 8 may include a gear component for speed control and / or speed regulation of the picking roller speed of the picking rollers 6. As in the Fig. 4As shown, the harvesting attachment 2 can be supplied with drive energy by the self-propelled agricultural machine 1 via a drive coupling 23, wherein the transmission component of the control and / or regulating device 8 is designed and / or positioned between the drive coupling 23 and the picking rollers 6, in particular with regard to the transmission of rotational force.

[0048] In the Fig. 4The control and / or regulating device 8 is designed and configured to control and / or regulate the picking roller speed of all picking rollers 6 of all picking units 5 independently of the speed of the chopping devices 22. Alternatively or additionally, the control and / or regulating device 8 can be designed and configured to adjust, in particular control and / or regulate, the picking roller speed of all picking rollers 6 of all picking units 5 simultaneously and independently of the speeds of other components of the harvesting header, in particular independently of the speed of the conveyor chains 9 and / or independently of the speed of the chopping devices 22 and / or independently of the speed of the transverse conveyor auger 14.

[0049] Furthermore, the control and / or regulating device 8 can be designed and configured to reduce the picking roller speed of all picking rollers 6 of all picking units 5 of the harvesting attachment 2, in particular to reduce it linearly, in order to achieve a reduction in the grain loss detected by the grain loss sensor 7.

[0050] The self-propelled agricultural machine 1 and / or the harvesting attachment 2 may have a moisture sensor (not shown in the figures) for measuring the moisture content of the harvested crop. The control and / or regulating device 8 may be designed and configured to adjust, in particular to control and / or regulate, the picking roller speed of all picking rollers 6 of all picking units 5 depending on the grain loss detected by the grain loss sensor 7 and the moisture content of the harvested crop detected by the moisture sensor. It may be provided that a higher picking roller speed is set for moist harvested crops, while a lower picking roller speed is set for dry harvested crops, particularly in comparison to the higher picking roller speed. In other words, the picking roller speed is increased as the moisture content of the harvested crop increases.The picking roller speed is reduced as the moisture content of the harvested crop decreases. Reference symbol list

[0051] 1 Self-propelled agricultural machine 2 Harvesting attachment 3 Plant rows 4 Crop 5 Picking unit 6 Picking rollers 7 Grain loss sensor 8 Control and / or regulating device 9 Conveyor chain 10 Impact plate 11 Picking roller pivot axis 12 Cross auger pivot axis 13 Cross auger 14 Machine frame 15 Outer stem dividers 16 Stem dividers 17 Infeed area 18 Conveyor 19 Deflection plate 20 Cover 21 Direction of movement 22 Chopping device 23 Drive coupling FR Direction of travel Q Cross axis

Claims

1. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided with a harvesting attachment (2), - wherein the harvesting attachment (2) has multiple picking units (5) for harvesting a crop (4) formed in rows of plants (3) and each picking unit (5) has - two picking rollers (6) for separating the crop (4) from a part of the plant bearing the crop (4), - two conveying chains (9) for conveying the crop (4) and - a chopping device (22), - wherein the harvesting attachment (2) has at least one grain loss sensor (7) for detecting a grain loss of the lost grains of the crop detached from the bearing part of the plant (4), - wherein the harvesting attachment (2) or the self-propelled agricultural working machine (1) has an open-loop and / or closed-loop control device (8) which is intended and designed to set, control on an open-loop basis and / or control on a closed-loop basis a picking roller speed of all the picking rollers (6) of all the picking units (5) of the harvesting attachment (2) - in dependence on the grain loss detected by means of the grain loss sensor (7), but - independently of the speeds of other components of the harvesting attachment (2) and in particular - independently of the speed of the conveying chains (9).

2. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to Claim 1, characterized - in that the grain loss sensor (7) of the harvesting attachment (2) is arranged in the harvesting attachment (2) in such a way that the lost grains of the grain loss impact on the grain loss sensor (7), and - in that the grain loss sensor (7) is intended and designed to detect the grain loss in dependence on the impact of the lost grains of the grain loss.

3. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the open-loop and / or closed-loop control device (8) is intended and designed to reduce the picking roller speed of a picking roller (6) of at least one picking unit (5) of the harvesting attachment (2) to reduce the grain loss detected by means of the grain loss sensor (7).

4. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the self-propelled agricultural working machine (1) and / or the harvesting attachment (2) has at least one moisture sensor for detecting a moisture content of the crop detached from the bearing part of the plant (4), wherein the open-loop and / or closed-loop control device (8) is intended and designed for setting the picking roller speed of all the picking rollers (6) of all the picking units (5) in dependence on - the grain loss detected by means of the grain loss sensor (7) and - the moisture content of the crop detected by means of the moisture sensor, in particular setting them in such a way - that a higher picking roller speed is set in the case of wet crops, - while a lower picking roller speed is set in the case of dry crops, in particular a lower picking roller speed in comparison with the higher picking roller speed.

5. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the grain loss sensor (7) of the harvesting attachment (2) is arranged between two picking units (5) of the harvesting attachment (2).

6. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the conveying chains (9) are intended and designed to feed the lost grains of the grain loss to the grain loss sensor (7).

7. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the grain loss sensor (7) has - an impact plate (10) for detecting the grain loss - and preferably additionally a deflection plate (19) for guiding the lost grains of the grain loss, from the respective conveying chain (9) to the impact plate (10).

8. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized in that the grain loss sensor (7) - forms an impact-plate balance, - has a piezoelectric sensor, - has a capacitive sensor and / or - has an inductive sensor.

9. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized - in that the grain loss sensor (7) has an impact plate (10) which is intended and designed to detect the impact energy of the lost grains of the grain loss by means of a mechanical change and / or mechanical deflection of the impact plate (10), - wherein the grain loss sensor (7) is intended and designed to determine the grain loss by means of the mechanical change and / or mechanical deflection of the impact plate (10).

10. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized - in that a grain loss sensor (7) is respectively assigned to each conveying chain (9), and / or - in that the harvesting attachment (2) has at least one moisture sensor (7) for detecting a moisture content of the crop (4) detached from the bearing part of the plant.

11. Harvesting attachment (2) or self-propelled agricultural working machine (1) provided therewith according to one of the preceding claims, characterized - in that the grain loss sensor (7) of the harvesting attachment (2) is arranged in the harvesting attachment (2) in such a way that the lost grains of the grain loss impact on the grain loss sensor (7).