Harvester

Abstract

To provide a harvester capable of performing separation control with optimum air quantity and sieve opening solving a problem with a conventional harvester in which increasing / decreasing control for air quantity of a fan and sieve opening by detecting a grain amount by a layer thickness sensor for detecting layer thickness of materials to be processed provided on a swinging separation shelf of a thresher that there is a risk of reducing a yield when separation control is performed with the air quantity and sieve opening which are not optimum with respect to a grain amount since the fan air quantity and sieve opening are controlled by one increasing / decreasing range.SOLUTION: A harvester in which a fan and a sieve are provided in a separation device for separating grains and contaminants such as waste straws of a thresher for separating and sorting out grains from grain culms reaped and conveyed by a reaping device, and a grain amount sensor is provided for detecting an amount of grains passing through the separation device has a plurality of control modes with different change ranges of the fan air quantity and the sieve opening, and the control mode is determined by a detection value of the grain amount sensor.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a harvester equipped with a threshing device for threshing cereal straw cut by a cutting device.

Background Art

[0002] Conventionally, there is a harvester that controls the increase and decrease of the air volume of a winnower and the opening degree of a sieve by detecting the amount of grain of a layer thickness sensor that detects the layer thickness of an object to be processed provided on a shaking sorting shelf of a threshing device (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the air volume of the winnower and the opening degree of the sieve are controlled within a single range of increase and decrease, there is a risk of causing a decrease in yield due to sorting control being performed with an air volume and sieve opening degree that are not optimal for the amount of grain.

[0005] Therefore, an object of the present invention is to provide a harvester capable of performing sorting control with an optimal air volume and sieve opening degree.

Means for Solving the Problems

[0006] In the invention according to claim 1, a winnower (20) and a sieve (18) are provided in a sorting device (16) that sorts grains and impurities such as straw discharged from a threshing device (3) that separates and sorts grains from cereal straw cut by a cutting device (4) and conveyed, and a grain amount sensor (25) that detects the amount of grains passing through the sorting device (16) is provided. A plurality of control modes with different change ranges of the wind force of the winnower (20) and the opening degree of the sieve (18) are provided, and the detected value of the grain amount sensor (25) classify the level of the amount of grains based on it, and according to the classified level Determine the control mode perform the sorting of the threshing device (3), and the change ranges of the wind force of the winnowing basket (20) and the opening degree of the sieve (18) in each control mode are configured to be set-changeableIt is a harvesting machine characterized by the following.

[0007] According to the invention described in claim 1, a plurality of control modes with different ranges of change in the wind force of the winnowing fan 20 and the opening degree of the sieves 18 are provided, and the control mode is determined by the detected value of the grain amount sensor 25. Therefore, sorting control can be performed with an optimal air volume and sieve opening degree. In addition, since the change ranges of the wind force of the winnowing basket (20) and the opening degree of the sieve (18) in each control mode are configured to be set-changeable, it is possible to make settings suitable for the variety and working environment, and the sorting accuracy and working efficiency are improved.

[0008] The invention described in claim 2 is a harvesting machine according to claim 1, which is provided with setting units 40U, 40D, 43U, 43D for setting the minimum and maximum values of the change ranges of the wind force of the winnowing fan 20 and the opening degree of the sieves 18 in each control mode, and starting from the minimum value at the start of control of each control mode.

[0009] According to the invention described in claim 2, since setting units 40U, 40D, 43U, 43D for setting the minimum and maximum values of the change ranges of the wind force of the winnowing fan 20 and the opening degree of the sieves 18 in each control mode are provided, it is possible to make settings suitable for the variety and working environment, and the sorting accuracy and working efficiency are improved.

[0010] Since it starts from the minimum value at the start of control of each control mode, it is possible to prevent the wind force of the winnowing fan 20 from being too strong or the opening degree of the sieves 18 from being too large, and sorting errors and losses can be reduced.

[0011] The invention described in claim 3 is a harvesting machine according to claim 1 or claim 2, which is provided with a front camera 7 for photographing the cereal straw to be cut in front of the machine body and / or a rear camera 8 for photographing the straw discharged behind the machine body, and automatically corrects the wind force of the winnowing fan 20 and the opening degree of the sieves 18 when the number of green pixels of the cereal straw to be cut in front analyzed from the photographed image of the front camera 7 is equal to or more than a predetermined value and / or when the number of grains attached with branches and stems in the discharged straw scraps analyzed from the photographed image of the rear camera 8 is equal to or more than a predetermined value.

[0012] According to the invention described in claim 3, a front camera 7 for photographing the cereal straw to be cut in front of the machine body and / or a rear camera 8 for photographing the straw discharged behind the machine body are provided. When analyzing the photographed image of the front camera 7 and the number of green pixels of the cereal straw to be cut in the front is equal to or more than a predetermined value and / or when analyzing the photographed image of the rear camera 8 and the number of particles with branches and stems attached to the discharged straw debris is equal to or more than a predetermined value, the wind force of the winnowing basket 20 and the opening degree of the sieves 18 are automatically corrected. Therefore, appropriate sorting can be performed and a decrease in yield can be prevented.

[0013] The invention described in claim 4 determines whether the cut cereal straw is in a wet state based on the detection value of a moisture meter 28 provided in a conveying unit that conveys the cut cereal straw of the cutting device 4 toward the threshing device 3. When it is determined that the cut cereal straw is in a wet state, the air volume of the winnowing basket 20 is increased and the opening degree of the sieves 18 is enlarged. The combine harvester according to claim 1 or claim 2.

[0014] According to the invention described in claim 4, it is determined whether the cut cereal straw is in a wet state based on the detection value of a moisture meter 28 provided in a conveying unit that conveys the cut cereal straw of the cutting device 4 toward the threshing device 3. When it is determined that the cut cereal straw is in a wet state, the air volume of the winnowing basket 20 is increased and the opening degree of the sieves 18 is enlarged. Therefore, the number of ears discharged together with the straw without the grains being separated is reduced, and a decrease in yield can be prevented.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0016] Hereinafter, a combine harvester which is an embodiment of the harvesting machine of the present invention will be described in detail with reference to the drawings.

[0017] For ease of understanding, for the operator, the front is referred to as the front side, the rear as the rear side, the right hand side as the right side, and the left hand side as the left side for convenience of explanation, but the present invention is not limited thereby.

[0018] As shown in FIG. 1, 1 is a machine body frame, 2 is a traveling device provided at the lower part of the machine body frame 1, 3 is a threshing device provided on the machine body frame 1, 4 is a cutting device, 5 is a grain tank, and 6 is an operating part provided on one side in front of the threshing device 3.

[0019] The cutting device 4 is attached so as to be vertically movable by a cutting up-and-down cylinder.

[0020] At the upper front part of the cutting device 4, a front camera 7 for photographing the front cutting grain straw is provided.

[0021] The control device 27 analyzes the image of the video sent from the front camera 7 to determine whether the number of green pixels of the front cutting grain straw is equal to or greater than a predetermined value. If the number of green pixels of the cutting grain straw is equal to or greater than the predetermined value, it is determined that a large air volume of the straw basket 20 is required at the initial stage of the appropriate harvesting period, and the opening of the sheave 18 needs to be increased.

[0022] At the upper rear part of the machine body, a rear camera 8 for photographing the discharged straw debris is provided.

[0023] The control device 27 analyzes the image of the video sent from the rear camera 8 to determine whether there are more than a predetermined number of branch and stem attached grains in the discharged straw chips. If there are more than a predetermined number of branch and stem attached grains in the discharged straw chips, it is determined that a large air volume of the winnowing basket 20 is required and the opening degree of the sieve 18 needs to be increased.

[0024] In addition, a moisture meter 28 for measuring the moisture content of rice is provided in the conveying section that conveys the harvested rice straws towards the threshing device 3 by the harvesting device 4.

[0025] The control device 27 determines whether the harvested rice is in a wet state based on the detection value sent from the moisture meter 28. If it is determined that the harvested rice is in a wet state, the air volume of the winnowing basket 20 is increased and the opening degree of the sieve 18 is controlled to be larger.

[0026] In addition, a vehicle speed sensor 29 is provided on the machine body.

[0027] The control device 27 recognizes the current vehicle speed based on the detection value sent from the vehicle speed sensor 29.

[0028] In addition, a GNSS 30 is provided on the upper part of the machine body.

[0029] The control device 27 records map data, calculates the current position of the machine body based on the input from the GNSS 30, and stores it in the map data in time series.

[0030] As shown in FIGS. 2 and 3, an operating chamber 10 for threshing the rice straws cut by the harvesting device 4 and conveyed by the feed chain 9 is provided above the threshing device 3, and an operating cylinder 11 is axially mounted in the operating chamber 10 by an operating cylinder shaft 12.

[0031] The mainly lower side of the operating cylinder 11 is surrounded by an operating net 15.

[0032] Below the handling net 15, the transfer shelf 17 at the starting end of the oscillating sorting shelf 16 as a sorting device is faced. On the lower side of the transfer shelf 17, a sieve 18 for sorting grains and foreign matters is provided, and on the lower side of the sieve 18, a straw rack 19 capable of transferring straw debris is provided.

[0033] Below the transfer shelf 17 of the oscillating sorting shelf 16, a winnowing basket 20 is provided, and the winnowing basket 20 blows air toward the oscillating sorting shelf 16.

[0034] 21 is the first conveyor, and 22 is the second conveyor.

[0035] As shown in FIGS. 2 to 4, at a predetermined position above the oscillating sorting shelf 16, a layer thickness sensor 25 as a grain amount sensor for detecting the layer thickness of grains (objects to be processed) on the oscillating sorting shelf 16 is provided at the left-right center position.

[0036] The layer thickness sensor 25 has a sensor body 25a provided at the left-right center position of a mounting stay 26 fixed to the left and right machine frames of the threshing device 3. A detection arm 25b with a rotatable base is extended from the sensor body 25a toward the oscillating sorting shelf 16, and the detection arm 25b is rotatable upward from the initial angle A.

[0037] The layer thickness sensor 25 rotates the detection arm 25b upward from the initial angle A according to the layer thickness of the grains on the oscillating sorting shelf 16, and the sensor body 25a sends a detection voltage to the control device 27 according to the rotation angle.

[0038] That is, when the layer thickness of the grains on the oscillating sorting shelf 16 is thin (the amount of grains is small), a detection low voltage is sent to the control device 27, and the higher the layer thickness (the more the amount of grains), the higher the detection voltage is sent. Therefore, the control device 27 can recognize the layer thickness of the grains on the oscillating sorting shelf 16 according to the detection voltage from the layer thickness sensor 25.

[0039] Specifically, the range in which the detection arm 25b of the layer thickness sensor 25 rotates upward from the initial angle A by less than 5 degrees is set as a threshold value, and it is set as a noise region where impurities and the like move on the oscillating sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is less than 1V.

[0040] The range in which the detection arm 25b of the layer thickness sensor 25 swings upward from the initial angle A by 5 degrees or more and less than 15 degrees is defined as the area with a small amount of grains moving on the swing sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 1V or more and less than 3V.

[0041] The range in which the detection arm 25b of the layer thickness sensor 25 swings upward from the initial angle A by 15 degrees or more and less than 30 degrees is defined as the area with a medium amount of grains moving on the swing sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 3V or more and less than 5V.

[0042] The range in which the detection arm 25b of the layer thickness sensor 25 swings upward from the initial angle A by 30 degrees or more and less than 45 degrees is defined as the area with a large amount of grains moving on the swing sorting shelf 16, and the sensor voltage value output by the layer thickness sensor 25 is 5V or more.

[0043] Figure 5 is a control block diagram. A moisture meter 28, a vehicle speed sensor 29, a GNSS 30, a layer thickness sensor 25, a front camera 7, and a rear camera 8 are connected to the input side of the control device 27, and a transmission device 20a that changes the rotational speed of the winnowing basket 20 and a sheave rotation motor 18a that changes the opening degree of the sheave 18 are connected to the output side.

[0044] Figure 6 shows the wind force control setting unit of the winnowing basket 20 provided in the control unit 6. The range in which the control device 27 controls the transmission device 20a to change the rotational speed of the winnowing basket 20 and change the wind force is automatically set to the MAX mode, the MID mode, and the MIN mode. The minimum wind force and the maximum wind force of each mode are manually set by the first manual increase / decrease buttons 40U and 40D, and the manually set wind force is displayed on the first display unit 41.

[0045] That is, in the MAX mode, the minimum and maximum wind forces of the windmill 20 are manually set within the range of 1.8 m / s to 3.3 m / s by the first manual increase / decrease buttons 40U and 40D, and the set wind force is displayed on the first display unit 41. Note that the left diagram of the MAX mode in Fig. 6 is an example of the display when the minimum wind force is manually set, and the right diagram of the MAX mode is an example of the display when the maximum wind force is manually set.

[0046] In the MID mode, the minimum and maximum wind forces of the windmill 20 are manually set within the range of 1.4 m / s to 2.8 m / s by the first manual increase / decrease buttons 40U and 40D, and the set wind force is displayed on the first display unit 41. Note that the left diagram of the MID mode in Fig. 6 is an example of the display when the minimum wind force is manually set, and the right diagram of the MID mode is an example of the display when the maximum wind force is manually set.

[0047] In the MIN mode, the minimum and maximum wind forces of the windmill 20 are manually set within the range of 0.9 m / s to 2.4 m / s by the first manual increase / decrease buttons 40U and 40D, and the set wind force is displayed on the first display unit 41. Note that the left diagram of the MIN mode in Fig. 6 is an example of the display when the minimum wind force is manually set, and the right diagram of the MIN mode is an example of the display when the maximum wind force is manually set.

[0048] As described below in the control flow diagrams of Figs. 8 and 9, the control device 27 controls the transmission device 20a to change the rotational speed of the windmill 20 to change the wind force, and the ranges for automatic setting are the MAX mode, the MID mode, and the MIN mode. However, preferentially over the automatic setting by this control, it is also possible to manually switch to any of the MAX mode, the MID mode, and the MIN mode using the first mode manual switching button 42 of the wind force control setting unit.

[0049] FIG. 7 shows the opening degree control setting unit provided in the control unit 6. The range in which the control device 27 controls the sheave rotation motor 18a to change the opening degree of the sheave 18 is automatically set to the MAX mode, MID mode, and MIN mode. The lowest limit opening degree and the highest limit opening degree of each mode are manually set by the second manual increase / decrease buttons 43U and 43D, and the manually set opening degree is displayed on the second display unit 44. This represents a display example.

[0050] That is, in the MAX mode, the lowest limit opening degree and the highest limit opening degree of the sheave 18 are manually set by the second manual increase / decrease buttons 43U and 43D within the range of 60 degrees to 90 degrees, and the set opening degree is displayed on the second display unit 44. Note that the left diagram of the MAX mode in FIG. 7 is a display example when manually setting the lowest limit opening degree, and the right diagram of the MAX mode is a display example when manually setting the highest limit opening degree.

[0051] In the MID mode, the lowest limit opening degree and the highest limit opening degree of the sheave 18 are manually set by the second manual increase / decrease buttons 43U and 43D within the range of 45 degrees to 75 degrees, and the set opening degree is displayed on the second display unit 44. Note that the left diagram of the MAX mode in FIG. 7 is a display example when manually setting the lowest limit opening degree, and the right diagram of the MAX mode is a display example when manually setting the highest limit opening degree.

[0052] In the MIN mode, the lowest limit opening degree and the highest limit opening degree of the sheave 18 are manually set by the second manual increase / decrease buttons 43U and 43D within the range of 30 degrees to 60 degrees, and the set opening degree is displayed on the second display unit 44. Note that the left diagram of the MAX mode in FIG. 7 is a display example when manually setting the lowest limit opening degree, and the right diagram of the MAX mode is a display example when manually setting the highest limit opening degree.

[0053] Note that as described below in the control flow diagrams of FIGS. 8 and 9, the range in which the control device 27 controls the sheave rotation motor 18a to change the opening degree of the sheave 18 is automatically set to the MAX mode, MID mode, and MIN mode. However, preferentially over this automatic setting by the control, it is also possible to manually switch to any of the MAX mode, MID mode, and MIN mode using the second mode manual switch button 45 of the opening degree control setting unit.

[0054] Next, based on the control flow diagrams of FIGS. 8 and 9, the wind force control of the straw chopper 20 and the opening degree control method of the sheave 18 when the combine harvester performs harvesting operations will be described.

[0055] FIG. 8 is a control flow diagram for analyzing the captured image of the front camera 7 and reflecting it in the wind force control of the straw chopper 20 and the opening degree control of the sheave 18.

[0056] When the engine of the combine harvester is started, the minimum and maximum wind forces of the straw chopper 20 in the MAX mode, MID mode, and MIN mode manually set by the first manual increase / decrease buttons 40U and 40D of the wind force control setting unit of the straw chopper 20 are read, and the minimum and maximum opening degrees of the sheave 18 in the MAX mode, MID mode, and MIN mode manually set by the second manual increase / decrease buttons 43U and 43D of the opening degree control setting unit of the sheave 18 are read. It is determined from the detected value of the vehicle speed sensor 29 that the machine body is moving, the amount of grain is determined from the detected value of the layer thickness sensor 25, and the number of green pixels is calculated by analyzing the captured image of the front camera 7.

[0057] At the start of the harvesting operation (start of control), the wind force of the straw chopper 20 and the opening degree of the sheave 18 are controlled in the MID mode, and the wind force of the straw chopper 20 is controlled according to the detected value of the layer thickness sensor 25 within the range of the minimum and maximum wind forces set in the MID mode, and the opening degree of the sheave 18 is controlled within the range of the minimum and maximum opening degrees set in the MID mode.

[0058] Note that as the detected value of the layer thickness sensor 25 increases (as the amount of grain increases), the wind force of the straw chopper 20 is increased and the opening degree of the sheave 18 is increased.

[0059] Then, when the detected value of the layer thickness sensor 25 becomes larger than a predetermined value (when the amount of grain becomes more than a predetermined value), the control device 27 changes from the MID mode to the MAX mode, and controls the wind force of the straw chopper 20 according to the detected value of the layer thickness sensor 25 within the range of the minimum and maximum wind forces set in the MAX mode, and controls the opening degree of the sheave 18 within the range of the minimum and maximum opening degrees set in the MAX mode.

[0060] And when analyzing the captured image of the front camera 7 and the number of green pixels of the grain straw to be cut in front is equal to or more than a predetermined value, the wind force of the winnowing basket 20 is increased (the air volume is increased), and the opening degree of the sheave 18 is increased.

[0061] Further, when the detected value of the layer thickness sensor 25 becomes smaller than a predetermined value (when the amount of grain is less than a predetermined value), the control device 27 changes from the MID mode to the MIN mode, and controls the wind force of the winnowing basket 20 according to the detected value of the layer thickness sensor 25 within the range of the set minimum wind force and the maximum wind force in the MIN mode, and controls the opening degree of the sheave 18 within the range of the set minimum opening degree and the maximum opening degree in the MIN mode.

[0062] And when analyzing the captured image of the front camera 7 and the number of green pixels of the grain straw to be cut in front is equal to or more than a predetermined value, the wind force of the winnowing basket 20 is increased (the air volume is increased), and the opening degree of the sheave 18 is increased.

[0063] FIG. 9 is a control flowchart for analyzing the captured image of the rear camera 8 and reflecting it in the wind force control of the winnowing basket 20 and the opening degree control of the sheave 18.

[0064] When starting the engine of the combine, read the minimum and maximum wind forces of the winnowing basket 20 in the MAX mode, MID mode, and MIN mode manually set by the first manual increase / decrease buttons 40U and 40D of the wind force control setting unit of the winnowing basket 20, and read the minimum and maximum opening degrees of the sheave 18 in the MAX mode, MID mode, and MIN mode manually set by the second manual increase / decrease buttons 43U and 43D of the opening degree control setting unit of the sheave 18, judge from the detected value of the vehicle speed sensor 29 that the machine body is moving forward, judge the amount of grain from the detected value of the layer thickness sensor 25, and analyze the captured image of the rear camera 8 to calculate the number of grains with branch stalks attached to the discharged chaff.

[0065] At the start of the harvesting operation (start of control), the wind force of the winnowing pan 20 and the opening degree of the sheave 18 are controlled in the MID mode. The wind force of the winnowing pan 20 is controlled according to the detected value of the layer thickness sensor 25 within the range of the set minimum wind force and maximum wind force in the MID mode, and the opening degree of the sheave 18 is controlled within the range of the set minimum opening degree and maximum opening degree in the MID mode.

[0066] Note that as the detected value of the layer thickness sensor 25 increases (as the amount of grain increases), the wind force of the winnowing pan 20 is increased and the opening degree of the sheave 18 is increased.

[0067] When the detected value of the layer thickness sensor 25 becomes larger than a predetermined value (when the amount of grain becomes larger than a predetermined value), the control device 27 changes from the MID mode to the MAX mode, and controls the wind force of the winnowing pan 20 according to the detected value of the layer thickness sensor 25 within the range of the set minimum wind force and maximum wind force in the MAX mode, and controls the opening degree of the sheave 18 within the range of the set minimum opening degree and maximum opening degree in the MAX mode.

[0068] When analyzing the captured image of the rear camera 8 and there are a predetermined value or more of grains with attached branches and stems in the discharged straw debris, the wind force of the winnowing pan 20 is increased (the air volume is increased) and the opening degree of the sheave 18 is increased.

[0069] When the detected value of the layer thickness sensor 25 becomes smaller than a predetermined value (when the amount of grain becomes smaller than a predetermined value), the control device 27 changes from the MID mode to the MIN mode, and controls the wind force of the winnowing pan 20 according to the detected value of the layer thickness sensor 25 within the range of the set minimum wind force and maximum wind force in the MIN mode, and controls the opening degree of the sheave 18 within the range of the set minimum opening degree and maximum opening degree in the MIN mode.

[0070] When analyzing the captured image of the rear camera 8 and there are a predetermined value or more of grains with attached branches and stems in the discharged straw debris, the wind force of the winnowing pan 20 is increased (the air volume is increased) and the opening degree of the sheave 18 is increased.

[0071] Note that the controls in the control flow diagrams of FIGS. 8 and 9 described above operate separately or simultaneously. Also, at the start of control in the MAX mode, MID mode, and MIN mode, it starts from the lowest limit value (the lowest limit wind force, the lowest limit opening).

[0072] Also, based on the detection value of the moisture meter 28 that measures the moisture content of the rice, which is provided in the conveying unit that conveys the harvested rice straws of the harvesting device 4 towards the threshing device 3, it is determined whether the harvested rice straws are in a wet state. If it is determined that the harvested rice straws are in a wet state, the air volume of the winnowing basket 20 may be increased, and the opening degree of the sieve 18 may be controlled to be larger.

[0073] Also, the control device 27 calculates the current aircraft position based on the input from the GNSS 30, stores the wind force control data of the winnowing basket 20 and the opening degree control of the sieve 18 in the map data, and may apply it during the harvesting operation of the field in the next year. Note that the wind force control data of the winnowing basket 20 and the opening degree control of the sieve 18 may be stored in the map data for several years so that appropriate data can be selected and used, or more appropriate data may be overwritten and stored.

[0074] In short, the MAX mode, MID mode, and MIN mode are provided as a plurality of control modes with different change ranges for the wind force of the winnowing basket 20 and the opening degree of the sieve 18, and the control mode is determined by the detection value of the layer thickness sensor 25, so that sorting control can be performed with an optimal air volume and sieve opening degree.

[0075] Also, since the first manual increase / decrease buttons 40U, 40D and the second manual increase / decrease buttons 43U, 43D, which are setting parts for setting the lowest limit value and the highest limit value of the change range of the wind force of the winnowing basket 20 and the opening degree of the sieve 18 in the MAX mode, MID mode, and MIN mode, are provided, it is possible to make settings suitable for the variety and working environment, and the sorting accuracy and working efficiency are improved.

[0076] Also, since it starts from the lowest limit value at the start of control in the MAX mode, MID mode, and MIN mode, it is possible to prevent the wind force of the winnowing basket 20 from being too strong or the opening degree of the sieve 18 from being too large, and sorting errors and losses can be reduced.

[0077] In addition, a front camera 7 for photographing the cereal straws to be cut in front of the machine body and / or a rear camera 8 for photographing the straws discharged behind the machine body are provided. When analyzing the photographed image of the front camera 7 and the number of green pixels of the cereal straws to be cut in the front is equal to or greater than a predetermined value, the wind force of the winnowing basket 20 is increased and the opening degree of the sheave 18 is increased. When analyzing the photographed image of the rear camera 8 and the number of grains with attached branches and stems in the discharged straw debris is equal to or greater than a predetermined value, the wind force of the winnowing basket 20 is increased and the opening degree of the sheave 18 is increased. Therefore, the wind force of the winnowing basket 20 and the opening degree of the sheave 18 are automatically corrected, enabling appropriate sorting and preventing a decrease in yield.

[0078] In addition, it is determined whether the cut cereal straws are in a wet state based on the detection value of a moisture meter 28 provided in a conveying unit that conveys the cut cereal straws of the cutting device 4 toward the threshing device 3. When it is determined that the cut cereal straws are in a wet state, the air volume of the winnowing basket 20 is increased and the opening degree of the sheave 18 is increased. Therefore, the number of ears discharged together with the straw without the grains being separated is reduced, preventing a decrease in yield.

Explanation of Signs

[0079] 3 Threshing device 4 Cutting device 7 Front camera 8 Rear camera 16 Sorting device 18 Sheave 20 Winnowing basket 25 Grain amount sensor (layer thickness sensor) 28 Moisture meter 40U, 40D Setting unit (first manual increase / decrease button) 43U, 43D Setting unit (second manual increase / decrease button)

Claims

1. In a harvester equipped with a winnowing device (20) and a sieve (18) in a sorting device (16) that sorts grains and impurities such as straw from the grains separated and sorted from the cereal straw cut and conveyed by a cutting device (4), and provided with a grain amount sensor (25) for detecting the amount of grains passing through the sorting device (16), a plurality of control modes with different ranges of change in the wind force of the winnowing device (20) and the opening degree of the sieve (18) are provided, the level of the grain amount is classified based on the detected value of the grain amount sensor (25), the control mode is determined according to the classified level, and sorting of the threshing device (3) is performed. The range of change in the wind force of the winnowing device (20) and the opening degree of the sieve (18) in each control mode is configured to be settable. A harvester characterized by this.

2. A setting unit (40U, 40D, 43U, 43D) for setting the minimum and maximum values of the range of change in the wind force of the winnowing device (20) and the opening degree of the sieve (18) in each control mode is provided, and it starts from the minimum value at the start of control of each control mode. The harvester according to Claim 1, characterized by this.

3. A front camera (7) for photographing the cereal straw to be cut in front of the machine body and / or a rear camera (8) for photographing the straw discharged behind the machine body are provided. When analyzing the photographed image of the front camera (7) and the number of green pixels of the cereal straw to be cut in the front is equal to or more than a predetermined value and / or when analyzing the photographed image of the rear camera (8) and there are a predetermined value or more of grains with branches and stalks attached to the discharged straw chips, the wind force of the winnowing device (20) and the opening degree of the sieve (18) are automatically corrected. The harvester according to Claim 1 or Claim 2, characterized by this.

4. It is determined whether the cut cereal straw is in a wet state based on the detected value of a moisture meter (28) that measures the moisture content of the cereal straw provided in the conveying unit that conveys the cut cereal straw of the cutting device (4) toward the threshing device (3). When it is determined that the cut cereal straw is in a wet state, the wind volume of the winnowing device (20) is increased and the opening degree of the sieve (18) is increased. The harvester according to Claim 1 or Claim 2, characterized by this.

Images