Crop measurement accuracy improvement system and procedure

Abstract

A crop measuring system of an agricultural machine that harvests and processes crops comprises a tank configured to store crops; a crop conveyor configured to feed the crops to the tank. The agricultural machine further comprises a controller, at least one weight sensor, and at least one image sensor. The controller is configured to: receive weight measurements of only a portion of the crop in the tank from the at least one weight sensor, receive dimensional and positioning measurements of the total amount of crop in the tank from the at least one image sensor, and determine the mass of the total amount of crop stored in the tank based on one or more signals received from the at least one weight sensor and one or more signals received from the at least one image sensor.

Description

Area of Revelation

[0001] This description relates to agricultural machinery and in particular to crop measurement systems of agricultural machinery. Background of the Revelation

[0002] There are a variety of different types of agricultural machinery. Agricultural machinery includes, among others, combine harvesters, sugarcane harvesters, cotton harvesters, self-propelled forage harvesters, and windrowers. During operation, agricultural machinery can thresh, chop, or otherwise process crops. The crop is often fed into a tank. Accurate quantitative measurement of the crop quantity is important. Brief description

[0003] In an example implementation, a crop measuring system of an agricultural machine comprises: a tank configured to store crop; a crop conveyor configured to feed the crop to the tank; at least one weight sensor configured to measure the weight of a portion of the crop stored in the tank, the portion being that positioned over the at least one weight sensor; at least one image sensor configured to capture one or more images indicative of the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank; and a controller configured to: receive one or more signals from the at least one weight sensor indicative of the weight of the portion of the crop measured by the at least one weight sensor;Receiving one or more signals from the at least one image sensor indicative of the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank; and determining the mass of the crop stored in the tank based on the one or more signals received from the at least one weight sensor and the one or more signals received from the at least one image sensor. In some implementations, the at least one image sensor is spaced from the crop stored in the tank.

[0004] In some implementations, the controller is configured to determine the mass of the crop stored in the tank further based on the positioning of the at least one weight sensor. In some implementations, the crop measuring system further comprises at least one tilt sensor configured to measure the tilt of the agricultural machine with respect to the direction of gravity; the controller is configured to receive one or more signals from the at least one tilt sensor indicative of the tilt of the agricultural machine with respect to the direction of gravity; and the controller is configured to determine the mass of the crop stored in the tank further based on the one or more signals received from the at least one tilt sensor.

[0005] In some implementations, the controller is configured to determine the mass of the remaining portion of the crop stored in the tank based on the dimensions of the crop stored in the tank, the positioning of the crop stored in the tank relative to the positioning of the at least one weight sensor, and the one or more signals received from the at least one weight sensor. In such implementations, the remaining portion of the crop stored in the tank is the crop stored in the tank less the portion of the crop measured by the at least one weight sensor.

[0006] In some implementations, the controller is configured to determine the dimensions of the portion of the crop stored in the tank and the dimensions of a remaining portion of the crop stored in the tank based on the positioning of the crop stored in the tank relative to the positioning of the at least one weight sensor. In some implementations, the controller is configured to determine the mass of a remaining portion of the crop stored in the tank based on the dimensions of the portion of the crop stored in the tank, the dimensions of the remaining portion of the crop stored in the tank, and the one or more signals received from the at least one weight sensor.In some implementations, the controller is configured to determine the mass of the crop stored in the tank based on the mass of the portion of the crop stored in the tank and the mass of the remaining portion of the crop stored in the tank.

[0007] In some implementations, the at least one weight sensor comprises a first weight sensor and a second weight sensor, and the first weight sensor is positioned at a different height than the second weight sensor. In some implementations, the crop conveyor includes an outlet from which crop is fed to the tank. In some implementations, the crop conveyor outlet is positioned at a higher height than the at least one weight sensor. In some implementations, the at least one image sensor comprises a first sensor positioned on the crop conveyor at a higher height than the crop conveyor outlet and / or a second sensor positioned on the crop conveyor at a lower height than the crop conveyor outlet.

[0008] In some implementations, the controller is configured to receive a yield measurement of the crop; the controller is configured to determine an adjusted yield value of the crop based on the mass of the crop stored in the tank; and the controller is configured to determine a yield calibration value for a yield calibration curve based on the yield measurement and the adjusted yield value.

[0009] In some implementations, the controller is configured to: receive an additional yield measurement; determine a yield performance different from the additional yield measurement based on the additional yield measurement and the yield calibration curve; and provide the yield performance on a user display. In some implementations, the controller is configured to adjust a harvesting plan for the agricultural machine based on the yield calibration curve. In some implementations, the controller is configured to adjust a harvesting plan for the agricultural machine based on the mass of crop stored in the tank.

[0010] In some implementations, the crop measuring system further comprises: a threshing assembly configured to process the crop; and the crop conveyor configured to feed crop processed by the threshing assembly to the tank.

[0011] In another exemplary implementation, a crop measurement system of an agricultural machine comprises: a tank configured to store crop; a crop conveyor configured to feed the crop to the tank; at least one weight sensor configured to measure the weight of a portion of the crop stored in the tank; a controller configured to: receive one or more signals from the at least one weight sensor indicative of the weight of the portion of the crop stored in the tank; receive one or more signals from the at least one image sensor indicative of the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank;and determining the mass of the crop stored in the tank based on the one or more signals received from the at least one weight sensor and the one or more signals received from the at least one image sensor;

[0012] In some implementations, the controller is configured to receive a yield measurement of the crop from a yield measurement sensor of the agricultural machine; the controller is configured to determine an adjusted yield value of the crop based on the mass of the crop stored in the tank; and the controller is configured to determine a calibration value for a yield calibration curve based on the yield measurement relative to the adjusted yield value.

[0013] In some implementations, the controller is configured to: receive an additional yield measurement; determine a yield performance different from the additional yield measurement based on the additional yield measurement and the yield calibration curve; and provide the yield performance on a user display.

[0014] In another example implementation, a method for measuring crop for an agricultural machine comprises: receiving one or more signals from at least one weight sensor positioned in a tank of the agricultural machine, the tank configured to store crop, the one or more signals indicative of the weight of a portion of the crop stored in the tank; receiving one or more signals from at least one additional sensor indicative of the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank; and determining the mass of the crop stored in the tank based on the one or more signals received from the at least one weight sensor and the one or more signals received from the at least one additional sensor.

[0015] In some implementations, the method further comprises: determining the mass of a remaining portion of the crop stored in the tank based on the dimensions of the crop stored in the tank, the positioning of the crop stored in the tank, the positioning of the at least one weight sensor, and the weight of the portion of the crop measured by the at least one weight sensor; and determining the mass of the crop stored in the tank based on the mass of the portion of the crop stored in the tank and the mass of the remaining portion of the crop stored in the tank. Short description of the drawings

[0016] With reference to the following description of the implementations of the disclosure together with the accompanying drawings, the above-mentioned aspects of the present disclosure and the manner in which they are achieved will become more apparent, and the disclosure itself will be more understandable; in the drawings: Fig. 1 is a side view of an exemplary agricultural machine configured to harvest and process crops; Fig. 2A is a plan view of an exemplary tank of the agricultural machine; Fig. 2B is a schematic view of an exemplary tank of the agricultural machine in an inclined orientation with crop material in the tank; Fig. 3 is a plan view of an exemplary control system for the agricultural machine; Fig. 4 is a flowchart of a portion of an exemplary method for measuring crop material for an agricultural machine; Fig. 5 is a flowchart illustrating a block of the portion of the exemplary method as shown in Fig. 4 shows in more detail; and Fig. 6 shows an exemplary calibration curve configured to be used according to the exemplary method of Fig. 4 and Fig. 5 to be generated and used.

[0017] In all of the different views, corresponding reference numerals are used to indicate corresponding parts. Detailed description

[0018] The implementations of the present disclosure described below are not intended to be exhaustive or to limit the disclosure to the precise forms disclosed in the following detailed description. Rather, the implementations are chosen and described so that others skilled in the art may recognize and understand the principles and practices of the present disclosure.

[0019] In Fig. 1, an implementation of an agricultural machine 10 is shown. The agricultural machine 10 includes a frame 12 and one or more ground engaging mechanisms, such as wheels 14 or tracks, in contact with an underlying ground surface. In the exemplary implementation, the wheels 14 are coupled to the frame 12 and are used to move the agricultural machine 10 in a forward operating direction (which is shown in Fig. 1 to the left) and in other directions. The agricultural machine 10 includes a power plant, such as a prime mover, for propelling the agricultural machine 10. In some implementations, operation of the agricultural machine 10 is controlled from an operator cab 16. The operator cab 16 may include any number of controls for controlling operation of the agricultural machine 10, such as a user interface. In some implementations, operation of the agricultural machine 10 is performed by an operator in the operator cab 16, a remote operator, or an automated system.

[0020] A cutting attachment 18 is disposed at a front end of the agricultural machine 10 and is used to harvest crop material and feed the crop material to a feeder house 20. The term "crop material," as used herein, includes grain (e.g., corn, wheat, soybeans, rice, oats) and a non-grain component (NCR). The feeder house 20 directs the crop material to a guide drum 22. The guide drum 22 directs the crop material to an inlet 24 of a threshing assembly 26, as shown in Fig. 1. The threshing assembly 26 comprises a housing 34 and one or more threshing rotors. A single threshing rotor 36 is Fig. 1. The threshing rotor 36 includes a drum 38 arranged along a threshing axis 100, and the threshing rotor 36 rotates about the threshing axis 100. The threshing assembly 26 further includes a feeding section 40, a threshing section 42, and a separating section 44. The feeding section 40 is arranged at a front end of the threshing assembly 26, the separating section 44 is arranged at a rear end of the threshing assembly 26, and the threshing section 42 is arranged between the feeding section 40 and the separating section 44. The threshing assembly 26 further includes a threshing concave 43 positioned in the threshing area 42 and below the threshing rotor 36, guide vanes 47 positioned above the threshing rotor 36, and a separating grate 45 positioned in the separating area 44 and below the threshing rotor 36. Crop falls through the threshing concave 43 and through the separating grate 45.

[0021] In some implementations, the crop is directed to a clean crop guide assembly 28 having a fan 46 and louvered screens 48, 50. The screens 48, 50 are longitudinally reciprocable, as indicated by arrow 114. The clean crop guide assembly 28 removes NKB and directs the grain via a screw conveyor 52 to a crop conveyor 94. In some implementations, the crop conveyor 94 conveys the crop upward and deposits the crop into a tank 30, as shown in Fig. 1. The crop in the tank 30 can be unloaded from the agricultural machine by a discharge conveyor 32, for example, onto a grain wagon, trailer, truck, or other receiving unit.

[0022] As in Fig. 1, in the exemplary implementation, the agricultural machine 10 includes at least one sensor 118, positioned, for example, on the crop conveyor 94 and configured to measure a yield of the crop. The at least one sensor 118 is configured to measure a force of crop being pushed into contact with the at least one sensor 118 before the crop is deposited in the tank 30. In some implementations, the agricultural machine 10 includes at least one sensor 120, positioned, for example, in a path of the crop and configured to measure a moisture content of the crop.

[0023] In some implementations, the tank 30 comprises as shown in Fig. 2A, a floor 130 and a plurality of side walls 132 surrounding and extending upwardly from the floor 130. The tank 30 includes additional sections coupled between the side walls 132, which in some implementations accommodate movement of the side walls relative to the floor 130. In some implementations, the floor 130 includes a plurality of sections, with different sections of the floor 130 being located at different heights, at different angles, or both. The crop conveyor 94 transports crop to the floor 130 of the tank 30, where the crop is piled up to form a heap, which in Fig. 2A. Conventional agricultural machinery may assume that a pile of crop has a predetermined shape.

[0024] The agricultural machine 10 includes at least one sensor 122 configured to measure the dimensions (e.g., size and shape) of the pile of crop in the tank 30 or to capture one or more images indicative thereof. The at least one sensor 122 is also configured to measure the positioning of the pile of crop stored in the tank 30 or to capture one or more images indicative thereof. In various implementations, the at least one sensor 122 may be a camera, radar, or a light-emitting sensor (e.g., a UV light sensor, a LiDAR sensor). In the exemplary implementation, the at least one sensor 122 includes, as shown in Fig. 2A a first sensor 122a and a second sensor 122b.

[0025] In the exemplary implementation, the at least one sensor 122 is positioned on the crop conveyor 94; however, it is understood that in other implementations, one or more sensors of the at least one sensor 122 may be positioned away from the crop conveyor 94, e.g., on the plurality of side walls 132 of the tank 30. In various implementations, the crop conveyor 94 may be a screw conveyor as shown in Fig. 2A, a belt conveyor, or any other conveyor for transporting crop to the tank 30. In the example implementation, the crop conveyor 94 includes an outlet 124 from which the crop exits the crop conveyor 94 as it is discharged into the tank 30. In some implementations, the at least one sensor 122 is positioned at a higher elevation than the outlet 124 of the crop conveyor 94. In some implementations, the at least one sensor 122 is positioned at a lower elevation than the outlet 124 of the crop conveyor 94. In some implementations, the first sensor 122a is positioned at a higher elevation than the outlet 124 of the crop conveyor 94 and the second sensor 122b is positioned at a lower elevation than the outlet 124 of the crop conveyor 94. In the exemplary implementation, the at least one sensor 122 is spaced from the pile of crop in the tank 30.The heap of crop may be referred to as the total amount of crop in the tank 30.

[0026] In the exemplary implementation, the agricultural machine 10 includes at least one sensor 126 configured to measure the weight of a portion of the crop stored in the tank 30. The portion of the crop measured by the at least one sensor 126 is that portion positioned above the at least one sensor 126. In the exemplary implementation, the at least one sensor 126 is a scale. In the exemplary implementation, the at least one sensor 126 includes a circular top surface; however, it is understood that in other implementations, the top surface may be rectangular, oval, or otherwise shaped.

[0027] In the exemplary implementation, the agricultural machine 10 includes at least one sensor 150 configured to measure an inclination of the agricultural machine 10 with respect to the direction of gravity 116. It is understood that the portion of the crop measured by the at least one sensor 126 (i.e., positioned above the at least one sensor 126) may change as the agricultural machine 10 inclines. For example, as shown in Fig. 2B, in implementations where the at least one sensor 126 comprises a circular top surface, the portion of the crop measured by the at least one sensor 126 when the agricultural machine 10 is tilted such that the circular top surface is not perpendicular to the direction of gravity (i.e., arrow 116): (i) includes the crop (C1) positioned outside a notional circular cylindrical column extending perpendicularly from the perimeter of the circular top surface, and (ii) does not include the crop (C2) positioned inside the notional circular cylindrical column. In such an example (where the agricultural machine 10 is tilted), the portion of the crop measured by the at least one sensor 126 has an elliptical (rather than circular) cross-section.This aspect of the disclosure applies to implementations where the top surface of the at least one sensor 126 is circular or has another shape.

[0028] In various implementations, the at least one sensor 126 may be implemented as a strain gauge, capacitive sensor, hydraulic sensor, pneumatic sensor, or any other weight sensor. In the exemplary implementation, the at least one sensor 126 is positioned on the bottom 130 of the tank 30; however, it should be understood that in other implementations, one or more of the at least one sensor 126 may be positioned on the plurality of sidewalls 132 or otherwise above the bottom 130 of the tank 30. In the exemplary implementation, the at least one sensor 122 includes, as shown in Fig. 2A a first sensor 126a positioned at a first portion of the floor 130 and a second sensor 126b positioned at a second portion of the floor 130.

[0029] With reference now to Fig. 3, an exemplary control system 200 including a controller 202 is shown. The control system 200 includes one or more memories 206 included in or accessible by the controller 202 and one or more processors 208 included in or accessible by the controller 202. The one or more processors 208 are configured to execute instructions (e.g., one or more algorithms) stored in the one or more memories 206. The controller 202 may be a single controller or multiple controllers operatively coupled to one another. The controller 202 may be located on the agricultural machine 10 or remotely from the agricultural machine 10. The controller 202 may be coupled to other components of the agricultural machine 10 and to one or more remote devices via a wired connection or wirelessly.In some cases, the controller 202 may be wirelessly connected to other components of the agricultural machine 10 and to one or more remote devices via Wi-Fi, Bluetooth, near field communication, or another wireless communication protocol.

[0030] As in Fig. 3, the controller 202 is operatively coupled to each of the sensors 118, 120, 122, 126, and 150 and configured to receive one or more signals therefrom. For example, the controller 202 is configured to receive one or more signals from the at least one sensor 126 indicative of the weight of the portion of the crop measured by the at least one sensor 126. The controller 202 is configured to receive one or more signals from the at least one sensor 122 indicative of: (i) the dimensions of the pile of crop stored in the tank 30, and (ii) the positioning of the pile of crop stored in the tank 30. The controller is configured to receive one or more signals from the at least one sensor 150 indicative of the inclination of the agricultural machine with respect to the direction of gravity 116. As shown in Fig. 3, in the exemplary implementation, the controller 202 is operatively coupled to a display 210 and configured to output one or more signals to the display 210, such signals being described in more detail herein. In the exemplary implementation, the controller 202 is operatively coupled to a user interface 212 and configured to receive one or more signals from the user interface 212, such as those related to a harvesting plan (e.g., speed, direction, header height).

[0031] The control system 200 is for determining the mass of the crop stored in the tank 30 in an exemplary method 400 shown in Fig. 4. In the example method 400, in some implementations thereof, the agricultural machine 10 moves through a work area for harvesting crop at block 402. In some implementations, at block 404, crop is processed by one or more subsystems of the agricultural machine 10, including at least the threshing assembly 26. In some implementations, at block 406, the crop conveyor 94 delivers the crop processed by the threshing assembly 26 to the tank 30.

[0032] With continued reference to method 400, at block 408, controller 202 receives one or more signals from the at least one sensor 126 indicative of the weight of the portion of the crop measured by the at least one sensor 126. At block 410, controller 202 receives one or more signals from the at least one sensor 122 indicative of the dimensions of the pile of crop stored in tank 30 and the positioning of the pile of crop stored in tank 30. In some implementations, at block 411, controller 202 receives one or more signals from the at least one sensor 150 indicative of the inclination of agricultural machine 10 with respect to gravity direction 116.At block 412, the controller 202 determines the mass of the pile of crop stored in the tank 30 based on the one or more signals received from the at least one sensor 126 and the one or more signals received from the at least one sensor 122.

[0033] In some implementations, the controller 202 determines the mass of the pile of crop stored in the tank 30 further based on the one or more signals received from the at least one sensor 150. For example, if the agricultural machine 10 is tilted such that the upper surface of the at least one sensor 126 is not perpendicular to the direction of gravity 116, only a portion of the mass of the portion of crop above the at least one sensor 126 will be considered in a weight measurement by the at least one sensor 126. To account for such a phenomenon, the controller 202 is configured to determine the mass of the portion of crop by adjusting the weight of the portion of crop (measured by the at least one sensor 126) with respect to the tilt of the agricultural machine 10 with respect to the direction of gravity 116 (measured by the at least one sensor 150).

[0034] In the exemplary implementation, the controller 202 determines the mass of the crop stored in the tank 30 further based on the positioning of the at least one sensor 126. For example, as in Fig. 5, the controller 202, at block 414 (exemplarily included in block 412), compares the positioning of the at least one sensor 126 with respect to the positioning and dimensions of the pile of crop to determine: (i) the dimensions of the portion of crop stored in the tank; and (ii) the dimensions of a remaining portion of crop stored in the tank 30. It should be understood that the remaining portion of crop stored in the tank 30 is defined herein as the total amount of crop stored in the tank 30 less the portion of crop measured by the at least one sensor 126.

[0035] With further reference to Fig. 5, at block 415 (exemplarily included in block 412), the controller 202 determines the mass of the remaining portion of the crop stored in the tank 30 based on the determined dimensions of the portion of the crop stored in the tank 30, the determined dimensions of the remaining portion of the crop stored in the tank 30, and the one or more signals received from the at least one sensor 126 indicative of the weight of the portion of the crop stored in the tank 30. For example, once the dimensions of the remaining portion of the crop are determined, the controller 202 uses the mass ratio for the dimensions of the portion of the crop to determine the mass of the remaining portion of the crop.

[0036] At block 416 (exemplarily included in block 412), the controller 202 determines the mass of the total amount of crop stored in the tank 30 based on the mass of the portion of crop stored in the tank 30 and the mass of the remaining portion of crop stored in the tank.

[0037] With further reference to the method 400 as shown in Fig. 4, in some implementations, at block 418, performed following block 412, the controller 202 receives one or more signals from the at least one sensor 118 indicative of a yield measurement of the crop performed by the at least one sensor 118. With further reference to the method 400 as shown in Fig. 4, at block 420, the controller 202 determines an adjusted yield value of the crop based on the determined mass of the crop stored in the tank 30. It is understood that the yield measurement and the adjusted yield value are quantifications that approximate an amount of crop per unit area harvested by the agricultural machine 10 or per unit time.

[0038] In the exemplary implementation, the controller 202 determines a yield calibration value based on the yield measurement and the adjusted yield value at block 422. For example, the yield calibration value is the point on a curve, such as the one shown in Fig. 6, where the yield measurement and the adjusted yield value intersect. In the exemplary implementation, the controller 202 updates one or more yield calibration curves, each composed of multiple yield calibration values for an operating characteristic of the agricultural machine 10 or the work location (e.g., speed, crop type, moisture content), with the determined yield calibration value. An exemplary yield calibration curve is shown in Fig. 6. For the exemplary yield calibration curve of Fig. 6, the adjusted yield value for a particular operating characteristic was determined four times (as described in block 420) and plotted each time as a function of the corresponding yield measurement received from the at least one sensor 118.

[0039] Referring again to the method 400 as shown in Fig. 4, in the exemplary implementation, at block 424, the controller 202 receives an additional yield measurement, for example, from the at least one sensor 118. At block 426, the controller 202 determines a yield performance based on the additional yield measurement and the yield calibration curve. For example, the controller 202 determines, as indicated by Fig. 6 suggests that yield performance can be assessed by identifying the adjusted yield value at the point on the calibration curve intersected by the additional yield measurement.

[0040] In some implementations, at block 428, the controller 202 provides the yield performance on a display 210 that displays the yield performance to a user, for example, in the cab 16 of the agricultural machine 10. In some implementations, at block 430, the controller 202 adjusts the harvest plan (e.g., the speed, the direction, the header height) for the agricultural machine 10 based on the determined mass of the crop stored in the tank 30. For example, the controller 202 may adjust the harvest plan automatically based on the determined mass of the crop stored in the tank 30, automatically based on the yield calibration curve or the yield performance value, or based on one or more signals received from the user interface 212 (e.g.,such signals indicating a user input received via the user interface 212 as a result of the yield performance displayed to the user via the display 210).

[0041] Although the disclosure has been illustrated and described in detail in the drawings and the foregoing description, such illustration and description are exemplary and not limiting, it being understood that exemplary implementation(s) have been shown and described, and that all changes and modifications that come within the spirit of the disclosure are intended to be protected. It is noted that alternative implementations of the present disclosure may not include all of the described features, but may still benefit from at least some of the advantages of such features. Those of ordinary skill in the art can readily devise their own implementations that incorporate one or more of the features of the present disclosure and are within the spirit and scope of the present disclosure as defined by the appended claims.

Claims

[1] Crop measuring system of an agricultural machine, comprising: a tank configured to store crop material; a crop conveyor configured to feed the crop to the tank; at least one weight sensor configured to measure the weight of a portion of the crop stored in the tank, the portion being that positioned above the at least one weight sensor; at least one image sensor configured to capture one or more images indicating the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank; and a controller configured to: Receiving one or more signals from the at least one weight sensor indicative of the weight of the portion of the crop measured by the at least one weight sensor; Receiving one or more signals from the at least one image sensor indicating the dimensions of the crop stored in the tank and the positioning of the crop stored in the tank; and Determining the mass of the crop stored in the tank based on the one or more signals received from the at least one weight sensor and the one or more signals received from the at least one image sensor. [2] The crop measuring system of claim 1, wherein the controller is configured to determine the mass of the crop stored in the tank further based on the positioning of the at least one weight sensor. [3] The crop measuring system of claim 1, further comprising at least one tilt sensor configured to measure the tilt of the agricultural machine with respect to the direction of gravity; wherein the controller is configured to receive one or more signals from the at least one tilt sensor indicative of the tilt of the agricultural machine with respect to the direction of gravity; and to determine the mass of the crop stored in the tank further based on the one or more signals received from the at least one tilt sensor. [4] The crop measuring system of claim 1, wherein the controller is configured to determine the mass of a remaining portion of the crop stored in the tank based on the dimensions of the crop stored in the tank, the positioning of the crop stored in the tank relative to the positioning of the at least one weight sensor, and the one or more signals received from the at least one weight sensor; and wherein the remaining portion of the crop stored in the tank is the crop stored in the tank less the portion of the crop measured by the at least one weight sensor. [5] The crop measuring system of claim 1, wherein the controller is configured to determine the dimensions of the portion of the crop stored in the tank and the dimensions of a remaining portion of the crop stored in the tank based on the positioning of the crop stored in the tank relative to the positioning of the at least one weight sensor; and wherein the remaining portion of the crop stored in the tank is the crop stored in the tank less the portion of the crop measured by the at least one weight sensor. [6] The crop measuring system of claim 5, wherein the controller is configured to determine the mass of a remaining portion of the crop stored in the tank based on the dimensions of the portion of the crop stored in the tank, the dimensions of the remaining portion of the crop stored in the tank, and the one or more signals received from the at least one weight sensor. [7] The crop measuring system of claim 6, wherein the controller is configured to determine the mass of the crop stored in the tank based on the mass of the portion of the crop stored in the tank and the mass of the remaining portion of the crop stored in the tank. [8] The crop measuring system of claim 1, wherein the at least one weight sensor comprises a first weight sensor and a second weight sensor; and wherein the first weight sensor is positioned at a different height than the second weight sensor. [9] A crop measuring system according to claim 1, wherein the crop conveyor comprises an outlet from which crop is supplied to the tank; and wherein the outlet of the crop conveyor is positioned at a higher height than the at least one weight sensor. [10] Crop measuring system according to claim 9, wherein the at least one image sensor comprises a first image sensor positioned at a higher height than the outlet of the crop conveyor on the crop conveyor and / or a second image sensor positioned at a lower height than the outlet of the crop conveyor on the crop conveyor. [11] The crop measurement system of claim 1, wherein the controller is configured to receive a yield measurement of the crop; wherein the controller is configured to determine an adjusted yield value of the crop based on the mass of the crop stored in the tank; and wherein the controller is configured to determine a yield calibration value for a yield calibration curve based on the yield measurement and the adjusted yield value. [12] Crop measuring system according to claim 11, wherein the controller is configured to: to receive an additional yield measurement; to determine a yield performance different from the additional yield measurement based on the additional yield measurement and the yield calibration curve; and provide the yield performance on a user display. [13] The crop measurement system of claim 11, wherein the controller is configured to adjust a harvesting plan for the agricultural machine based on the yield calibration curve. [14] The crop measuring system of claim 1, wherein the controller is configured to adjust a harvesting plan for the agricultural machine based on the mass of the crop stored in the tank. [15] The crop measuring system of claim 1, further comprising a threshing assembly configured to process the crop; and wherein the crop conveyor is configured to feed crop processed by the threshing assembly to the tank.

Images