Loss test tray for determining the threshing loss of harvesters

Description

[0001] The invention relates to a loss test tray according to the preamble of claim 1.

[0002] Such a loss test shell is known from DD 52 020 A.

[0003] Determining threshing loss is used to optimize the operating parameters of the harvester, such as driving speed and throughput.

[0004] Such loss test pans are known from DE 100 62 114 C2 and DE 10 2005 028 997 A1. To determine the threshing loss, the straw, chaff, and grain collected using such a loss test pan must be separated in order to count or weigh the ultimately collected lost grains. A disadvantage of the known loss test pans is that the separation process for chaff, straw, and grain is very complex and difficult to carry out.

[0005] The object of the invention is to provide a loss test pan which allows a simplified separation of straw, chaff and grain and thus a simplified determination of threshing losses.

[0006] This object is achieved according to the invention by a loss test shell according to claim 1 and a system according to claim 11. Advantageous developments of the invention are specified in the subclaims.

[0007] A particularly advantageous feature of the loss test tray for determining the threshing loss of harvesting machines, which is designed to be placed on the ground and at least partially driven over by a combine harvester during threshing and serves to collect the lost grains as well as straw and chaff, is that the loss test tray has transverse grooves on its upper side and a collector arranged laterally on the loss test tray at one end of the transverse grooves.

[0008] Preferably, the loss test pan is placed on the ground in such a way that the transverse grooves are aligned transversely to the direction of travel of the harvester. However, this is not mandatory, as the alignment of the transverse grooves in relation to the direction of travel of the harvester has no influence on the determination of threshing losses. However, the lost grains are retained better if the transverse grooves are aligned transversely to the direction of travel of the harvester. The transverse grooves serve to collect the grains in the transverse grooves and simplify the separation of straw, chaff and grain, as when the loss test pan is shaken and the collected material is wind sifted, the grains settle at the bottom of the transverse grooves and can then be easily fed to the collector arranged on the side of the loss test pan at one end of the transverse grooves, allowing an exact determination of the threshing loss.

[0009] Preferably, the transverse grooves have a sawtooth-shaped cross-section; in particular, the alignment of the saw teeth can correspond to the direction of travel of the combine harvester. A sawtooth-shaped cross-section thus means that the transverse grooves have a triangular cross-section, so that the lower corner of the triangle, as the lowest point, forms a pronounced depression in the transverse grooves in which the grains are deposited.

[0010] According to the invention, the collector is formed by a tube rotatably mounted in corresponding receptacles of the loss test pan, with one or more wall openings arranged one behind the other in the axial direction of the tube and parallel to the tube axis for receiving the loss grains from the transverse grooves into the tube. The wall openings are formed by axially parallel slots in the tube wall. By rotating the tube about its axis, these slots can be brought into a position relative to the transverse grooves, allowing the grains to flow from the transverse grooves of the loss test pan into the collector, which is designed as a tube, when the loss test pan is held at an angle.

[0011] The collector can thus be designed as a rotatably mounted tube, preferably as a stainless steel tube, which has, for example, two slots offset from one another on its circumference, each running over half the length of the loss test pan. By rotating the collector accordingly relative to the loss test pan, the lost grains collected in the transverse grooves of the loss test pan can be transferred section by section through the slots into the collector. The rotatable tube is preferably enclosed in a transparent plastic casing, for example made of PVC or polyurethane, so that the user can see the position of the openings in the tubular collector relative to the transverse grooves of the loss test pan.The plastic sheath is designed as a sleeve, which is arranged coaxially with the collector, which is designed as a tube, and has a lateral slot parallel to the axis of rotation of the tube, directly adjacent to the end area of ​​the transverse grooves. By rotating the tube in the sleeve in this way, the slot in the collector can be aligned with the slot in the sleeve, allowing the waste grains to be pushed from the transverse grooves into the collector.

[0012] Preferably, the collector is formed by a tube rotatably mounted in corresponding receptacles of the loss test bowl, with a first end of the tube being closed and the opposite second end of the tube accommodating a measuring cup. In particular, the measuring cup can have a slotted guide that accommodates at least one projection on the circumference of the tube.

[0013] The guide rail in the measuring cup wall, which accommodates a projection on the circumference of the pipe forming the collector, forms a positive, non-rotatable connection between the measuring cup and the collector and in turn enables the measuring cup to be removed from the collector for further evaluation of the collected lost grains, for example by weighing them using a scale to determine the threshing loss.

[0014] Preferably, the loss test tray comprises a rectangular frame made of metal strips, in particular angled metal strips, which accommodates a plastic insert. The plastic insert has the transverse grooves, or the frame made of metal strips is cast into the plastic loss test tray, in particular cast into the underside of the loss test tray. This shifts the center of gravity of the loss test tray downward, preventing the loss test tray from tipping over. Such a frame made of metal strips, which can be designed as a welded construction, stiffens the entire loss test tray and thus makes it more robust.

[0015] Preferably, the loss detection shell has a transmitter which emits an acoustic signal and / or a radio signal for locating the loss detection shell; in particular, the radio signal can be used to establish a radio connection to a handset, in particular according to a Bluetooth standard.

[0016] The location signal can be evaluated in particular by means of a handheld device such as a mobile radio terminal with a corresponding application for evaluating the location signals in order to facilitate the location of the loss test tray under the straw on the area to be mown.

[0017] To ensure quick retrieval of the loss detection tray after placement, especially during swath placement, the loss detection tray preferably has a small transmitter. This communicates with an application on a handheld device, such as a mobile phone, via a Bluetooth connection and a range of approximately 50 m.

[0018] Preferably, the surface of the loss detection tray has at least a partial signal color. This also makes it easier to locate the loss detection tray.

[0019] Preferably, the loss test tray has at least one edge on its underside running transversely across at least part of the width of the loss test tray.

[0020] Preferably, the loss test tray has on its underside a plurality of grooves extending transversely across at least part of the width of the loss test tray.

[0021] In this case, the term "transverse" actually refers to an orientation perpendicular to the direction of travel of the combine harvester, so that the stubble engages this edge. This edge thus serves to engage the stubble on the mown area, so that the loss control pan dropped during the combine harvester's travel is held and braked by the stubble.

[0022] The loss test pan has an edge on its underside and additionally has rod-shaped indentations of, for example, 8 mm across half the width of the pan, forming several transverse grooves. The edge and indentations prevent the loss test pan from sliding vertically between the stubble when it is removed from long stubble (for example, 30 cm to 40 cm), such as in rapeseed. When the loss test pan is placed down, it is then braked and held in place by the long rapeseed stubble, ensuring that the loss test pan rests horizontally on top of the stubble and does not tip to the side, which would falsify the threshing loss measurement.

[0023] In a preferred embodiment, the loss testing tray has a removable support on its upper side, which is adapted to the contour of the upper side of the loss testing tray and has openings in the transverse grooves through which individual grains of field crops can pass, in particular that the support is positively attached to the loss testing tray.

[0024] The support thus forms a corresponding negative shape compared to the top of the loss test tray as a positive shape, i.e. its contour is adapted to the top of the loss test tray.

[0025] Especially for rapeseed, small seeds, and sunflowers, an additional support is provided. This support is adapted to the surface of the loss control tray and thus to the sawtooth-shaped transverse grooves. The support can be made of 1 mm thick, flexible, transparent plastic and is shaped to allow some free space in the lower area of ​​the transverse grooves. Holes are drilled into these recesses at several intervals along the entire length of the transverse grooves. The hole size depends on the material to be harvested (e.g., 3 mm rapeseed). This allows the very small grains to be separated safely and quickly from chaff and straw.

[0026] Preferably, the loss test shell has a vibration motor, in particular that the loss test shell has a vibration motor with integrated accumulators for operating the vibration motor, in particular having a plug or a plug socket for establishing a plug connection for externally charging the accumulators.

[0027] Another tool for accelerating the grain / chaff / straw separation process is a vibration motor integrated into the loss test pan. This is switched on and off via a switch. Power is supplied by four integrated 9-volt batteries, which can be charged via a mini-USB cable. Experience shows that the battery life is approximately 60 minutes, which is sufficient for most measurements and covers all the measurements required to operate a combine harvester for at least one working day.

[0028] The resulting vibration causes the heavy particles, i.e., grains, to vibrate, allowing the lighter particles to be more easily blown away. The grains collect at the bottom of the transverse grooves, while the lighter particles collect at the top of the loss control pan. This allows straw and chaff to be easily separated from the grain by air sifting. This accelerates the evaluation of grain losses.

[0029] The cleaned grains then remain in the triangular bars of the bowl. They must now be collected and weighed. To do this, the collector of the collecting device, formed by a stainless steel tube, is rotated until the first slot on the tube is exposed, perpendicular to the triangular bars. The lost grains can now be pushed into the collector. The stainless steel tube is then rotated further until the second slot is also vertical, and the grains can also be pushed from the bars into the collector formed by the tube.

[0030] Once all the grains are in the stainless steel tube, it is rotated until the slots are closed. A labeled indicator helps the user determine the position of the tube. Now, the loss test pan, along with the collector located on the side of the loss test pan, must be positioned vertically so that the grains in the stainless steel tube slide into the removable measuring cup. This measuring cup is then separated from the collector of the pan, and the net weight of the loss grains can be determined using a precision scale.

[0031] A formula allows you to calculate the threshing loss as a percentage. The advantage of this method is that it eliminates the time-consuming process of counting the grains, and all destroyed grains (broken grains) are also recorded during weighing. Furthermore, a thousand-grain weight is not required.

[0032] Preferably, the loss test tray is received by a storage device and held in a releasable manner, in particular held electromagnetically.

[0033] The depositing device is intended for arrangement on a harvesting machine such as a combine harvester and the loss test tray can be triggered and deposited in particular via a control via the machine control of the combine harvester and / or via a radio signal via a handheld device such as a mobile radio terminal with a corresponding application.

[0034] The storage device can have flaps or be designed like a drawer for targeted storage of the loss test tray in long stubble such as rapeseed or sunflowers. The storage device under the inclined conveyor is preferably positioned on the left in the direction of travel, but ultimately can be adjusted to suit the specific conditions of the vehicle and the specific requirements.

[0035] The attachment of the storage device to a harvesting machine can be carried out in particular by means of screw connections and / or clamp connections and / or magnetically.

[0036] A system comprising at least one loss testing tray according to the invention and a storage device for arrangement on a harvesting machine is particularly advantageous.

[0037] Preferably, the system further comprises a hand-held fan for performing wind sifting of the lost grains collected by the loss-testing tray, as well as straw and chaff. The hand-held fan is preferably a hand-held fan with a rechargeable battery.

[0038] In a further preferred embodiment, the system further comprises a scale, in particular a battery-operated scale, in particular a precision scale.

[0039] The scale is preferably a precision scale that allows for the exact determination of even the smallest masses of lost grains.

[0040] In addition to the loss test tray, the system includes two additional tools for evaluating grain losses: a hand-held fan for separating straw and chaff from the grain, and a precision scale for determining the lost grain weight.

[0041] The straw, chaff, and grain mixture in the loss test pan can now be easily separated by shaking the loss test pan horizontally back and forth. The light and coarse particles (straw and chaff) move to the top, while the heavy particles (grain) move to the bottom, thus sorting the particles in the grooves of the loss test pan.

[0042] The light straw can now be quickly removed from the loss control pan by hand, while the hand-held fan, which can be adjusted to several power levels, is used to remove the chaff and fines. The vibration motor accelerates the separation of the grains by causing them to vibrate. The chaff and fines can now be blown away from the grains, as they are held in the triangular grooves of the loss control pan and can then be directed into the collector on the side of the loss control pan.

[0043] In a preferred embodiment, the system further comprises an application that can be installed and executed on a handheld device, in particular a mobile radio terminal, by means of which the threshing loss can be calculated from measurement results of a weighing of lost grains during threshing and / or by means of which the position of the loss testing pan can be determined.

[0044] To perform a precise loss check, it is advisable to set the machine to swathing position and fold away the chaff spreader. This way, the total losses across the entire width of the machine are behind the machine. Loss checks are also possible in chopping mode, but the distribution of lost grains across the entire working width may not be even, depending on the machine type and manufacturer.

[0045] The machine is driven to the loss limit displayed on the on-board computer during swath placement or to the performance limit during chopping. While observing the percentage engine load, the forward speed [km / h], the yield [t / ha], and the throughput [t / h], as well as the readings from the loss sensors, the combine harvester operator slides the loss test tray onto the stubble using a switch installed in the cab or via a radio link using a handheld transmitter and the transport and placement device installed under the feederhouse. After approximately 25 meters, the machine is stopped, and the combine harvester operator can begin the evaluation.

[0046] The depositing unit is preferably installed under the combine harvester's elevator, on the left side of the machine in the direction of travel. This means that during swath depositing, the total losses are always collected from the left half of the swath up to the center of the swath. Thus, on straw walker machines, the left sensor in the straw walker is always recorded. The same applies to hybrid and rotor machines. Another advantage is that the loss detection tray can always be inserted into the depositing device from the side (without having to go under the machine).

[0047] In addition to the loss test pan, the system according to the invention features two additional tools for evaluating grain losses: a hand-held fan for separating the chaff from the grain and a precision scale for determining the lost grain weight.

[0048] The straw, chaff, and grain mixture in the loss test pan can now be easily separated by shaking the loss test pan horizontally back and forth. This process works similarly to a preparation tray: the lighter, coarser parts (straw and chaff) rise to the top, while the heavier parts (grain) descend to the bottom and migrate into the transverse grooves of the loss test pan, thus sorting the grain.

[0049] The light straw can now be quickly removed from the bowl by hand, while the hand-held fan, which can be adjusted to several power levels, is used to remove the chaff and fines. The chaff and fines can now be blown away from the grains, as they are held in the transverse grooves of the loss control bowl.

[0050] Another tool for accelerating the grain / chaff / straw separation process is a vibration motor integrated into the loss detection tray. This is switched on and off via a switch. Power is supplied by four integrated 9-volt batteries, which can be charged at any time via a mini-USB cable. The operating time is approximately 60 minutes.

[0051] The resulting vibration causes the heavy particles, i.e., grains, to vibrate, allowing the lighter particles to be blown away more easily. This accelerates the analysis of grain losses.

[0052] The cleaned grains then remain in the transverse grooves of the pan. Because the transverse grooves of the loss test pan have a triangular cross-section, all grains collect in the lower area of ​​the transverse grooves of the loss test pan. The grains are then collected and weighed.

[0053] To do this, the collector, formed by a stainless steel tube, of the collecting device is rotated until the first slot is exposed perpendicular to the transverse grooves. The lost grains can now be pushed into the collector. The stainless steel tube is then rotated further until the second slot is also perpendicular to the loss test pan, and the grains can also be pushed from the transverse grooves into the container.

[0054] The collector is thus designed as a rotatably mounted stainless steel tube with two offset slots along its circumference, each extending over half the length of the loss test pan. By rotating the collector relative to the loss test pan, the lost grains collected in the transverse grooves of the loss test pan can be transferred section by section through the slots into the collector and then transferred from the collector into the measuring cup.

[0055] Once all the grains have been collected in the stainless steel tube, the tube is rotated until the slots are closed. A labeled indicator helps the user determine the position of the tube. Now, simply place the loss test pan vertically so that the grains in the stainless steel tube slide into the removable measuring cup. This measuring cup is then separated from the loss test pan, and the net weight of the loss grains is determined using a precision scale.

[0056] A formula allows you to calculate threshing losses as a percentage. The advantage of this method is that it eliminates the time-consuming process of counting the grains, and all destroyed grains (broken grains) are also recorded during weighing. Furthermore, a thousand-grain weight is not required.

[0057] An embodiment of the invention is illustrated in the figures and explained below. They show: Fig. 1: A top view of a loss test pan; Fig. 2: a section perpendicular to the transverse grooves of the loss test pan according to Fig. 1 ; Fig. 3 a section perpendicular to the transverse grooves of the loss test tray with additional perforated support Fig. 4 a perspective view of a detail of the transverse grooves and the collector of the loss test tray; Fig. 5 a perspective view of a storage device for receiving and depositing the loss test tray; Fig. 6 a schematic view of the arrangement of the storage device on a harvesting machine and the process of depositing a loss test tray.

[0058] Figure 1shows a plan view of the top side of a loss test pan 1. On the top side, the loss test pan 1 has transverse grooves 2 running from left to right across the entire width of the loss test pan 1. At the right lateral end of the loss test pan 1, a collector 3 is arranged to receive the loss grains collected in the transverse grooves 2. The Figure 1 upper end of the collector 3 is closed, while the one shown in the illustration Figure 1The lower end of the collector 3 carries a removable measuring cup 4, and the lower end of the collector 3 is open towards the measuring cup 4 in order to be able to pass the lost grains transferred to the collector 3 into the measuring cup 4. The measuring cup 4 is removable so that the collected lost grains can then be weighed using a precision scale in order to then calculate the threshing loss using the corresponding calculation formula. Furthermore, the loss testing pan 1 has an integrated vibration motor 5 and the batteries required to supply energy to the vibration motor 5. Switching on the vibration motor 5 causes the loss testing pan 1 to vibrate, which serves to separate the straw, chaff, and grain resting on the transverse grooves 2 on the upper side. The vibration causes the grain to sink into the transverse grooves 2, while the lighter components of straw and chaff move upwards.The vibration motor 5 is switched on and off via a switch arranged on the loss test tray 1.

[0059] The measuring cup 4 has a slotted guide that accommodates a cam-shaped projection on the circumference of the collector 3. The slotted guide in the measuring cup wall, which accommodates a cam-shaped projection on the circumference of the tube forming the collector 3, forms a positive, rotationally fixed connection between the measuring cup 4 and the collector 3 and, in turn, enables the removal of the measuring cup 4 from the collector 3 for further evaluation of the collected lost grains by weighing them using a scale to determine the threshing loss.

[0060] Figure 2 shows a section perpendicular to the transverse grooves 2 of the loss test tray 1 according to Fig. 1The transverse grooves 2 have a sawtooth-shaped cross-section to facilitate the collection of lost grains 7. Arrow 8 indicates the direction of discharge of straw, chaff, and grain, while arrow 9 indicates the direction of travel of the harvesting machine, such as a combine harvester. The lost grains 7 collect in the transverse grooves 7. The sawtooth-shaped cross-section of the transverse grooves 2, which counteracts the direction of discharge of straw, chaff, and grain, also serves to prevent straw, chaff, and grain from falling down, as otherwise the measurement results could be falsified. Furthermore, the geometry of the transverse grooves 2 facilitates the separation of straw, chaff, and grain for further analysis.

[0061] Figure 3shows a section perpendicular to the transverse grooves 2 of the loss test tray 1 with an additional perforated support 10. The support 10 is removably and positively attached to the loss test tray 1 and is adapted to the contour of the upper side of the loss test tray 1 with the transverse grooves 2. This means that the support 10 thus forms a corresponding negative shape compared to the upper side of the loss test tray 1 as a positive shape, whereby the support 10 maintains a distance from the loss test tray 1 in the area of ​​the deepest points of the transverse grooves 2 and has through holes 11 in these areas. The through holes serve to allow the loss grains 7' to pass through.

[0062] This additional support 10, which is adapted to the surface of the loss testing tray 1 and thus to the sawtooth-shaped transverse grooves 2, is intended especially for rapeseed and fine seeds as well as sunflowers. The support 10 is made of approximately 1 mm thick, flexible, transparent plastic and is shaped to leave some free space in the lower area of ​​the transverse grooves 2. In these recesses of the support 10, through holes 11 are inserted with several interruptions over the entire length of the transverse grooves 2. The hole size depends on the material to be harvested (e.g., rapeseed 3 mm). This allows the very small grains 7' to be separated safely and quickly from chaff and straw.

[0063] Figure 4shows a perspective view of a detail of the transverse grooves 2 and the collector 3 of the loss test pan 1. The collector 3 is formed by a tube rotatably arranged in a sleeve 6. The sleeve 6 has a slot parallel to the axis of the sleeve 6 at the level of the transverse grooves 2, so that the loss grains collected in the transverse grooves 2 can pass through this slot. The tube forming the collector 3, in turn, has two axially parallel slots offset around the circumference, each of which covers half the length of the loss test pan 1. The length of the loss test pan 1 refers to the extension of the loss test pan 1 perpendicular to the transverse grooves 2.By rotating the tube forming the collector 3, one of the two slots in the tube forming the collector 3 can be successively brought into line with the slot in the sleeve 6, in order to then transfer the collected lost grains from the respective part of the loss test shell 1 from the transverse grooves 2 into the collector 3 in sections. As soon as this has been done for the first section of the loss test shell 1, the second circumferentially offset slot in the tube forming the collector 3 can be brought into line with the slot in the sleeve 6 by further rotating the tube forming the collector 3, in order to then transfer the lost grains collected in the transverse grooves 2 from the second section of the loss test shell 1 into the collector 3.

[0064] Figure 5 shows a perspective view of a storage device 15 for receiving and storing the loss test tray 1. Figure 6shows a schematic view of the arrangement of the depositing device 15 on the inclined conveyor 18 immediately behind the cutting unit 17 of the harvesting machine and the process of depositing the loss test tray 1 on the stubble 20 of the mown field.

[0065] The storage device 15 for receiving and depositing the loss test tray 1 is attached to the harvester. The loss test tray 1 is accommodated in the storage device 15 in a rearward and downward-facing receptacle and is held therein electromagnetically. The electromagnets 16 can be deactivated by remote control, so that the loss test tray 1 slides out of the storage device 15 like a drawer and is deposited on the stubble 20 of the mown field.

[0066] The loss test pan 1 has a rear, downwardly projecting edge on its underside and is additionally provided with rod-shaped indentations approximately 8 mm deep across half the pan width, which thus form several transverse grooves on the underside of the loss test pan 1. In the case of long stubble 20, for example 30 cm to 40 cm high, such as in rapeseed, the edge and indentations ensure that the loss test pan 1 does not slide out vertically between the stubble 20, but instead places it horizontally on the stubble 20. When the loss test pan 1 is placed down, it is then slowed down and held by the long stubble 20 so that the loss test pan 1 lies horizontally on top of the stubble 20 and does not tip to the side, which would falsify the threshing loss measurement.

[0067] To facilitate the location of the loss detection tray 1 after placement, particularly during swath placement, the loss detection tray 1 is equipped with a transmitter that transmits a radio signal for locating the loss detection tray 1. This radio signal for locating the loss detection tray 1 can be evaluated using a handheld device. In the exemplary embodiment illustrated in the figures, a radio connection can be established from a handheld device to the transmitter of the loss detection tray 1 according to a Bluetooth standard.

[0068] The loss test tray 1 shown in the figures is part of a system that, in addition to the storage device 15 for receiving and depositing the loss test tray 1, also includes a handheld fan with an integrated accumulator and a precision scale for weighing the lost grains. Another component of the system is an application that can be installed and executed on a handheld device, in particular a mobile radio terminal, by means of which the threshing loss can be calculated from the measurement results of a measurement of lost grains during threshing and / or by means of which the position of the loss test tray can be determined.

[0069] The loss test pan 1 shown in the figures has a surface area of ​​0.25 m 2 . Accordingly, the threshing loss is calculated using the following formulas: Chopping: Druschverlust in % = gemessene Masse der Verlustkörner / Ertrag t / ha × 4 Swath placement:

[0070] In an alternative embodiment (not shown), the loss test pan has a surface area of ​​0.33 m 2 . In this case, the threshing loss is calculated using the following formulas: Chopping: Druschverlust in % = gemessene Masse der Verlustkörner / Ertrag t / ha × 3 Swath placement:

[0071] The formulas listed above are stored in the application, which is part of the system, and allow for convenient calculation of threshing loss. Simply enter the size of the loss pan according to the measuring area, the yield in t per hectare, the machine parameters (machine width and working width), and the measured mass of the lost grains to calculate the threshing loss in %.

[0072] If the yield is alternatively expressed in the usual agricultural unit of quintals per hectare, corresponding to one metric tonne per hectare, the results simply need to be multiplied by 10. These formulas are also included in the application.

Claims

1. Loss test panel (1) for determining the threshing loss of harvesters, which is intended to be placed on the ground and at least partially passed over by a combine harvester during threshing and which is used to collect the lost grain, as well as straw and chaff, wherein the loss test panel (1) has transverse grooves (2) on its upper side, as well as a collector (3) arranged laterally on the loss test panel (1) at one end of the transverse grooves (2), characterized in that the collector (3) is formed by a tube rotatably arranged in corresponding receptacles of the loss test panel (1) with one or more wall openings parallel to the tube axis arranged one behind the other in the axial direction of the tube for receiving the lost grain from the transverse grooves (2) in the tube.

2. Loss test panel (1) according to claim 1, characterized in that the transverse grooves (2) have a saw-tooth shaped cross section.

3. Loss test panel (1) according to any one of the preceding claims, characterized in that the collector (3) is formed by a tube rotatably arranged in corresponding receptacles of the loss test panel, wherein a first end of the tube is closed and the opposite second end of the tube accommodates a measuring cup (4), in particular in that the measuring cup (4) has a slotted guide, which accommodates at least one projection on the circumference of the tube.

4. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) has a rectangular frame made of metal strips, in particular metal angle strips, wherein the frame made of metal strips is embedded in the loss test panel (1) made from plastic, in particular embedded in the loss test panel (1) on the underside.

5. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) has a transmitter, which emits an acoustic signal and / or a radio signal for locating the loss test panel (1), in particular in that the radio signal is used to establish a radio connection with a hand-held device in line with a Bluetooth standard.

6. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) has at least one edge extending transversely over at least part of the width of the loss test panel on its underside.

7. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) a plurality of grooves extending transversely over at least part of the width of the loss test panel on its underside.

8. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) has a removable support (10) on its upper side, which is adapted to the contour of the upper side of the loss test panel (1) and has openings (11) in the transverse grooves, through which the individual grains (7') of crops can pass, in particular in that the support (10) is attached in a form-fitting manner to the loss test panel (1).

9. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) has a vibration motor (5), in particular in that the loss test panel has a vibration motor with integrated batteries for operating the vibration motor (5), in particular having a plug or a plug socket for creating a plug-in connection for externally charging the batteries.

10. Loss test panel (1) according to any one of the preceding claims, characterized in that the loss test panel (1) is accommodated by a storage device (15) and is held releasably, in particular held electromagnetically.

11. System comprising at least one loss test panel (1) according to any one of the preceding claims and a storage device (15) for accommodating and storing the loss test panel (1).

12. System according to claim 11, characterized in that the system further comprises a hand-held fan, in particular a hand-held fan with a battery, for performing wind sifting of the lost grain collected by means of the loss test panel (1), as well as straw and chaff.

13. System according to claim 11 or 12, characterized in that the system further comprises scales, in particular battery-operated scales, in particular precision scales.

14. System according to any one of claims 11 to 13, characterized in that the system further comprises an application that can be installed and run on a hand-held device, in particular a mobile radio terminal, by means of which, based on the measurement results of a measurement of lost grain during threshing, the threshing loss can be calculated and / or by means of which the position of the loss test panel (1) can be determined.