JP2011223959A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester for eliminating influence of disturbance from output of an amount-of-grain detection sensor.SOLUTION: A detection result of a charging port sensor 23a is corrected based on a rotational speed of a first screw conveyor 23, thus suppressing an influence of disturbance from the detection result of the charging port sensor 23a and precisely detecting the amount of grain stored in a grain tank 4. When the charging port sensor 23a is a pressure sensor, pressure from grain operating on the pressure sensor differs depending on the rotational speed of the first screw conveyor 23 even if the amount of grain is the same. However, by correcting the difference, detection precision of the charging port sensor 23a is increased.

Description

  The present invention relates to a combine that can accurately detect the amount of recovered grain.

  When performing harvesting work in a field, a combine that performs harvesting and threshing of grains and recovery of grains is often used. The combine travels on the field with a crawler, and harvests the culm with a cutting blade during the travel, conveys the harvested culm to the handling cylinder, and threshes. Then, the chaff sheave arranged below the barrel is used to sort the cocoons and grains separated from the cereal grains, and the selected grains are allowed to leak from the chaff sheave and are transferred to the grain tank via the screw conveyor. to recover.

  At the tip of the screw conveyor, a slat for attaching the grain into the grain tank is attached, and a grain amount detection sensor for detecting the amount of grain introduced by the slat is provided in the grain tank. It is. The grain amount detection sensor includes a piezoelectric element, and detects the grain amount based on the pressure when the grain comes into contact (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-24381

  However, the vibration of the engine and vibration generated by traveling in the field with unevenness propagate to the grain amount detection sensor, and these vibrations become disturbances and affect the output of the grain amount detection sensor. This is a factor that hinders accurate detection of the amount of grain.

  This invention is made | formed in view of such a situation, and it aims at providing the combine which can remove the influence of a disturbance from the output of a grain amount detection sensor.

  The combine which concerns on 1st invention conveys a grain from the threshing apparatus which threshs the harvested cereal, the storage part which stores the grain threshed by this threshing apparatus, and the said threshing apparatus to the said storage part In a combine comprising a screw conveyor and a grain amount detecting means for detecting the amount of grain conveyed by the screw conveyor, a rotational speed detecting means for detecting the rotational speed of the screw conveyor, and the rotational speed detecting means And correcting means for correcting the detection result of the grain amount detection means based on the detection result.

  In the present invention, the amount of grain stored in the storage unit corresponds to the rotational speed of the screw conveyor, and the detection result of the grain amount detection means is corrected based on the rotational speed of the screw conveyor to suppress the influence of disturbance. To do.

  In the combine according to the second aspect of the present invention, a blade is provided on the shaft portion at the end of the screw conveyor to project the grain into the storage portion, and the blade is synchronized with the rotation period of the screw conveyor. The grain is intermittently charged into the storage unit, the grain amount detecting means is adapted to detect a pressure caused by contact of an object, and the correcting means is the rotational speed detecting means. Based on the detection result, the means for obtaining the rotation period of the screw conveyor, and the grain amount detection means detected during the contact period in which the grains introduced from the blades included in the rotation period are in contact And integrating means for integrating the detection results of

  In the present invention, in the cycle of one rotation of the blade plate provided at the tip of the screw conveyor, the detection result detected during the period when the grain is put into the storage part is obtained, and the grain stored in the storage part Find the amount.

  In the combine according to the third aspect of the invention, the correcting means uses the accumulated result of the accumulating means based on the detection result of the grain amount detecting means detected in a period outside the contact period included in the rotation cycle. Means is provided for removing the included steady-state deviation.

  In the present invention, the detection result detected during the period when the grain is not put into the storage unit is considered to be a steady deviation due to the disturbance and the characteristics of the grain amount detection means. Therefore, the steady deviation is calculated based on the detection result. The correction | amendment which removes is performed and the precision of the detection result of a grain amount detection means is improved.

  The combine according to the fourth invention is a storage amount detection means for detecting the amount of grain stored in the storage section, and means for notifying an alarm when the storage amount detection means detects a predetermined amount of grain. It is characterized by providing.

  In the present invention, when a predetermined amount of grain is stored in the storage unit, for example, when the storage is full, the user is notified of this, and the end of cutting is urged.

  A combine according to a fifth aspect of the invention detects a drive source that supplies power to the threshing device, a clutch that interrupts transmission of power from the drive source to the threshing device, and an amount of grain stored in the storage unit. And a means for disengaging the clutch when the stored amount detecting means detects a predetermined amount of grain.

  In the present invention, when a predetermined amount of grains is stored in the storage unit, for example, when the storage is full, the clutch is disconnected and the cutting is forcibly terminated.

  In the combine which concerns on 1st invention, the influence of a disturbance is suppressed from the detection result of a grain amount detection means by correct | amending the detection result of a grain amount detection means based on the rotation speed of a screw conveyor, and storage The amount of grain stored in the section can be detected with high accuracy.

  In the combine which concerns on 2nd invention, in the period of one rotation of the blade provided in the front-end | tip part of a screw conveyor, the detection result detected in the period which has thrown the grain into the storage part is calculated | required, and a storage part It is possible to accurately obtain the amount of grain stored in the storage.

  In the combine according to the third invention, the detection result detected during the period when the grain is not put into the storage part is considered to be a steady deviation due to the disturbance and the characteristics of the grain amount detection means. By removing the steady deviation based on the above, it is possible to improve the accuracy of the detection result of the grain amount detection means.

  In the combine which concerns on 4th invention, when a predetermined amount of grains accumulates in the storage part, for example, when it becomes full, the user is notified. For this reason, the user can immediately terminate the harvesting after notifying the warning.

  In the combine according to the fifth aspect of the invention, when a predetermined amount of kernels is stored in the storage unit, for example, when it is full, the clutch is disconnected and the cutting is forcibly terminated. Therefore, excessive storage in the storage unit can be prevented, and damage to the combine can be prevented.

It is an external appearance perspective view of the combine which concerns on embodiment. It is side surface sectional drawing which outlines the internal structure of a threshing apparatus. It is a plane sectional view showing a grain tank roughly. It is a transmission mechanism figure which shows the transmission path of the driving force of an engine schematically. It is a block diagram which shows the structure of a control part. It is a table which shows the relationship between the engine speed and the coefficient β. It is an example of the graph which shows the relationship between the detected value of a spout sensor, and the detected value of a pickup sensor. It is a flowchart which shows the grain amount calculation process by CPU. It is a flowchart which shows the correction value calculation process by CPU. It is a flowchart explaining the alarm process by CPU. It is an example which shows the display screen of the display part which displays the grain quantity and storage rate which were stored by the grain tank. It is a flowchart which shows the parameter | index setting process by CPU. It is a figure which shows an example of the display screen displayed on the display part at the time of a trimming being complete | finished. It is a figure which shows an example of the display screen which displays the total storage amount stored by the grain tank. It is an example of the display screen which displays the storage amount of the range shown by the parameter | index in the total storage amount stored by the grain tank.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating a combine according to an embodiment. FIG. 1 is an external perspective view of a combine.

  In the figure, reference numeral 1 denotes a traveling crawler, and an airframe 9 is provided above the traveling crawler 1. A threshing device 2 is provided on the body 9. On the front side of the threshing device 2, there is provided a cutting unit 3 including a weed plate 3a for discriminating between a harvested corn straw and a non-harvested corn straw, a cutting blade 3b for harvesting the corn straw, and a raising device 3c for causing the corn straw. It is. On the right side of the threshing device 2 is provided a grain tank 4 for storing the grain, and on the left part of the threshing device 2 is provided a long feed chain 5 before and after conveying cereals. On the upper side of the feed chain 5, there is provided a clamping member 6 for clamping the cereal cake, and the clamping member 6 and the feed chain 5 face each other. In the vicinity of the front end portion of the feed chain 5, a vertical conveying device 7 is disposed. The grain tank 4 is provided with a cylindrical discharge auger 4 a for discharging the grain from the grain tank 4, and a cabin 8 is provided on the front side of the grain tank 4.

  The vehicle body 9 travels by driving the travel crawler 1. As the machine body 9 travels, the cereals are taken into the mowing unit 3 and mowed. The harvested corn straw is conveyed to the threshing device 2 via the vertical conveying device 7, the feed chain 5 and the clamping member 6, and threshed in the threshing device 2.

FIG. 2 is a side cross-sectional view schematically showing the internal configuration of the threshing apparatus 2, and FIG. 3 is a plan cross-sectional view schematically showing the grain tank 4.
As shown in FIG. 2, a handling room 10 for threshing cereals is provided at the front upper part of the threshing device 2. A cylindrical handling cylinder 11 whose axial direction is the longitudinal direction is mounted in the handling chamber 10, and the handling cylinder 11 is rotatable about the axis. A large number of teeth 12, 12,... 12 are arranged in a spiral on the peripheral surface of the barrel 11. On the lower side of the handling cylinder 11, a crimp net 15 is disposed for coping with the handling teeth 12, 12,. The said handling cylinder 11 rotates with the driving force of the engine 40 mentioned later, and threshs a cereal.

  Four dust feed valves 10 a, 10 a, 10 a, 10 a are juxtaposed in the front-rear direction on the upper wall of the handling chamber 10, and the dust feed valves control the amount of straw and grains sent to the rear part of the handling chamber 10. Adjust.

  A processing chamber 13 is connected to the rear of the handling chamber 10. A cylindrical processing cylinder 13b whose axial direction is the longitudinal direction is mounted in the processing chamber 13, and the processing cylinder 13b is rotatable around the axis. A large number of teeth 13c, 13c,..., 13c are arranged in a spiral on the peripheral surface of the processing cylinder 13b. A treatment net 13d that disperses the ridges in cooperation with the teeth 13c, 13c,..., 13c is disposed below the treatment cylinder 13b. The processing cylinder 13b is rotated by the driving force of the engine 40, and performs a process of separating the grain from the straw and the grain delivered from the handling chamber 10. A discharge port 13 e is opened below the rear end of the processing chamber 13.

  Four processing cylinder valves 13 a, 13 a, 13 a, 13 a are juxtaposed along the front-rear direction on the upper wall of the processing chamber 13, and the processing cylinder valves 13 a, 13 a, 13 a, 13 a go to the rear part of the processing chamber 13. Adjust the amount of straw and grains to be delivered.

  Below the crimp net 15 is provided a swinging sorter 16 for sorting grains and straws. The rocking sorter 16 is provided on the back side of the rocking sorter 17 for making the grains and straws uniform and selecting the specific gravity, and for rough sorting of the grains and straws. A chaff sheave 18 to be performed, and a stroller rack 19 provided on the rear side of the chaff sheave 18 for dropping the grains mixed in the straw. The Strollac 19 has a plurality of through holes (not shown). A swing arm 21 is connected to the front portion of the swing sorter 17. The swing arm 21 is configured to swing back and forth. By the swinging of the swinging arm 21, the swing sorting device 16 swings, and selection of straw and grains is performed.

  The swing sorting device 16 is provided below the chaff sheave 18 and further includes a grain sheave 20 that performs fine sorting of grains and straw. Below the grain sheave 20, a first grain plate 22 inclined with the front facing down is provided, and on the front side of the first grain plate 22, a first screw conveyor 23 is provided. The first screw conveyor 23 takes in the grain that has slid down the first grain plate 22 and feeds it to the grain tank 4.

  As shown in FIG. 3, a rectangular blade plate 23 b is provided on the shaft portion 23 c at the upper end of the first screw conveyor 23. The vane plate 23b protrudes in the radial direction about the shaft portion 23c. The vane plate 23b rotates in synchronism with the screw conveyor 23.

  The grain tank 4 is provided with a spout 4b, and the blade 23c faces the spout 4b. On the upper part of the grain tank 4, a push switch 4c is provided. When the grain tank 4 becomes full, the push switch 4c is pressed by the stored grain and outputs a signal to the control unit 100 described later. A spout sensor 23a is provided at a position facing the spout 4b to detect the amount of grain per unit time introduced from the spout 4b into the grain tank 4. The spout sensor 23a includes a piezoelectric element.

  The grain that has fallen from the grain sieve 20 onto the first grain plate 22 slides down toward the first screw conveyor 23. The slipped grain is transported by the first screw conveyor 23 and is intermittently thrown into the grain tank 4 from the spout 4b by the rotation of the blade 23b. As indicated by a broken line arrow in FIG. 3, a voltage is output from the piezoelectric element when the input grain comes into contact with the spout sensor 23 a, and the spout amount is detected based on the output voltage.

An inclined plate 24 is provided at the rear of the first grain plate 22 and is inclined downward from the rear. A second grain plate 25 that is inclined with the front facing down is connected to the rear end of the inclined plate 24. A second screw conveyor 26 is provided on the upper side of the connecting portion between the second grain plate 25 and the inclined plate 24 to convey straw and grains.
Falling objects that have fallen onto the inclined plate 24 or the second grain plate 25 from the through holes of the Strollac 19 slide down toward the second screw conveyor 26. The fallen fallen object is conveyed to the processing rotor 14 provided on the left side of the handling cylinder 11 by the second screw conveyor 26 and is threshed by the processing rotor 14.

  A tang 27 that performs a wind-up operation is provided in front of the first screw conveyor 23 and below the swing sorter 17. The wind generated by the wind-up operation of the carp 27 travels backward. A rectifying plate 28 for sending the wind upward is disposed between the tang 27 and the first screw conveyor 23.

  A passage plate 36 is connected to the rear end portion of the second grain plate 25. A lower suction cover 30 is provided above the passage plate 36. Between the lower suction cover 30 and the passage plate 36 is an exhaust passage 37 through which dust is discharged.

  An upper suction cover 31 is provided above the lower suction cover 30. Between the upper suction cover 31 and the lower suction cover 30, an axial fan 32 for sucking and discharging soot is disposed. A dust exhaust port 33 is provided behind the axial flow fan 32. The air flow generated by the operation of the tang 27 is rectified by the rectifying plates 28 and 28, then passes through the swing sorting device 16 and reaches the dust outlet 33 and the exhaust passage 37.

  Discharge amount sensors 34 and 34 each including a piezoelectric element are disposed in the dust outlet 33 and the exhaust passage 37, respectively. Grains are discharged from the dust outlet 33 and the exhaust passage 37 and come into contact with the discharge sensors 34 and 34. At this time, voltage signals are output from the piezoelectric elements of the discharge amount sensors 34, 34, and the amount of grain (loss amount) discharged from the dust outlet 33 and the exhaust passage 37 per unit time is detected. The discharge amount sensors 34 and 34 are not limited to sensors having a piezoelectric element, and an optical sensor having a light emitting element and a light receiving element is used as the discharge amount sensor 34, and the amount of grains passing between the light emitting element and the light receiving element. May be detected. Further, an ultrasonic sensor having a transmitter and a receiver may be used as the discharge amount sensor 34 to detect the amount of grain passing between the transmitter and the receiver.

  On the upper side of the upper suction cover 31, below the processing chamber 13, there is provided a sluice 35 that is inclined with the front facing downward. Exhaust discharged from the discharge port 13e of the processing chamber 13 slides down the downflow basin 35 and falls onto the Strollac 19.

  The driving of the traveling crawler 1, the cutting operation of the cutting unit 3, the rotation of the handling cylinder 11, the rotation of the processing cylinder 13 b, the swinging of the swing sorting device 16, the rotating operation of the first screw conveyor 23, etc. The driving force is used. FIG. 4 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

  As shown in FIG. 4, the engine 40 is connected to a traveling mission 42 via an HST (Hydro Static Transmission) 41. In the vicinity of the output shaft of the engine 40, an engine speed sensor 40a for detecting the engine speed is provided. The engine speed sensor 40a is a magnetic sensor having a Hall element or the like, and detects the speed by passing through a magnetic material of the output shaft.

  The HST 41 has a hydraulic pump (not shown), a mechanism (not shown) that adjusts the flow rate of hydraulic oil supplied to the hydraulic pump and the pressure of the hydraulic pump, and a transmission circuit 41a that controls the mechanism. ing.

  The traveling mission 42 has a gear (not shown) that transmits driving force to the traveling crawler 1. The traveling mission 42 is provided with a vehicle speed sensor 43 having a hall element. The vehicle speed sensor 43 detects the rotational speed of the gear and outputs a signal indicating the vehicle speed of the airframe corresponding to the rotational speed of the gear.

  The engine 40 is connected to the handling cylinder 11 and the processing cylinder 13b through an electromagnetic threshing clutch 44, and is also connected to a transmission mechanism 50. The transmission mechanism 50 is connected to the first screw conveyor 23. A pickup sensor 51 is provided in the vicinity of the shaft connecting the transmission mechanism 50 and the first screw conveyor 23. The pickup sensor 51 is a magnetic sensor having a Hall element and the like, and detects the number of rotations of the screw conveyor 23 by the passage of the magnetic material of the shaft.

  The engine 40 is connected to an eccentric crank 45 through a threshing clutch 44. The eccentric crank 45 is connected to the swing arm 21. As the eccentric crank 45 is driven, the swing sorting device 16 swings. The engine 40 is connected to the tang 27 through a threshing clutch 44. The engine 40 is connected to the reaping portion 3 via a threshing clutch 44 and an electromagnetic reaping clutch 46.

  The driving force of the engine 40 is transmitted to the traveling crawler 1 via the traveling mission 42, and the aircraft travels. Further, the driving force of the engine 40 is transmitted to the cutting unit 3 via the cutting clutch 46, and the cereal is harvested by the cutting unit 3.

  The driving force of the engine 40 is transmitted to the handling cylinder 11 via the threshing clutch 44, and the cereal is threshed by the handling cylinder 11. Further, the driving force of the engine 40 is transmitted to the processing cylinder 13b via the threshing clutch 44. The processing cylinder 13b separates the grain from the processed product threshed by the handling cylinder 11.

  In addition, the driving force of the engine 40 is transmitted to the swing sorting device 16 via the threshing clutch 44 and the eccentric crank 45, and discharged from the straw and grains leaked from the handling cylinder 11 and the discharge port 13e of the processing chamber 13. Sorting of the finished straw and grains is performed. Further, the driving force of the engine 40 is transmitted to the Kara 27 through the threshing clutch 44, and the soot selected by the swing sorting device 16 is discharged from the dust outlet 33 and the exhaust passage 37 by the wind action of the Kara 27. The

  Based on outputs from the spout sensor 23a, the engine speed sensor 40a, and the pickup sensor 51, a control unit that calculates the amount of grain stored in the grain tank 4 is mounted on the combine. FIG. 5 is a block diagram showing the configuration of the control unit, and FIG. 6 is a table showing the relationship between the engine speed and the coefficient β.

  The control unit 100 includes a CPU (Central Processing Unit) 100a, a ROM (Read Only Memory) 100b, a RAM (Random Access Memory) 100c, and an EEPROM (Electrically Erasable and Programmable Read Only Memory) 100d which are connected to each other by an internal bus 100g. ing. The CPU 100a reads the control program stored in the ROM 100b into the RAM 100c, and executes necessary control such as operation control of the dust feeding valve 10a and the processing cylinder valve 13a according to the control program. The CPU 100a has a built-in timer.

The EEPROM 100d stores an LUT (Look Up Table) 100h.
The LUT 100h stores a table showing the relationship between the engine speed and the coefficient β (see FIG. 6). The table includes an “engine speed” column and a “coefficient β” column, and each row of each column stores an engine speed and a value of a coefficient β corresponding to the engine speed (β1 to β6). Has been. The engine speed corresponds to the number of rotations of the screw conveyor 23.

  A correction variable X is set in the EEPROM 100d, and a value is stored in the correction variable X as necessary.

  The control unit 100 outputs a disconnection signal to the reaping clutch 46 and the threshing clutch 44 through the output interface 100f. Further, the control unit 100 outputs a display signal indicating that a predetermined video is displayed on the display unit 83 via the output interface 100f. Further, the control unit 100 outputs a lighting or extinguishing signal to the warning lamp 84 via the output interface 100f.

  The output signals of the cutting switch 80, the index setting switch 81, the operation switch 82, the spout sensor 23a, the push switch 4c, the pickup sensor 51, and the engine speed sensor 40a are input to the control unit 100 via the input interface 100e. Yes.

  In addition, a dashboard panel (not shown) is provided in the cabin 8, and a cutting switch 80, an index setting switch 81, a plurality of operation switches 82 and a threshing switch 85 are provided on the dashboard panel, and a liquid crystal panel is provided. A display portion 83 is provided. A warning lamp 84 is provided in the cabin 8. In response to the on / off of the cutting switch 80, the cutting clutch 46 and the threshing clutch 44 are connected. Further, the threshing clutch 44 is disconnected in response to the on / off of the threshing switch 85.

  The CPU 100a integrates the detection values related to the output signal of the spout sensor 23a and stores them in the EEPROM 100d in synchronization with the detection value related to the output signal of the pickup sensor 51. FIG. 7 is an example of a graph showing the relationship between the detection value of the spout sensor 23 a and the detection value of the pickup sensor 51. (A) is a graph which shows the relationship between time and the detected value of the spout sensor 23a, and the detected value of the spout sensor 23a has shown the pressure by grain, and is a moving average value in the predetermined sampling number. . (B) is a graph which shows the relationship between time and the detected value of the pickup sensor 51, and the detected value of the pickup sensor 51 has shown the rotation start time and rotation end time in one rotation of the blade 23b.

  The detection value of the pickup sensor 51 is detected as a pulse wave, and the interval between the pulse waves corresponds to the cycle of one rotation of the screw conveyor 23, that is, the cycle P of one rotation of the blade plate 23b. The CPU 100a takes in the detection value of the spout sensor 23a at a predetermined sampling period (for example, 100 [ms]) and stores it in the EEPROM 100d. The CPU 100a creates a time stamp each time a pulse wave is input from the pickup sensor 51, and associates the time stamp with the detection value input from the spout sensor 23a when the pulse wave is input. To remember.

  In FIG. 7, the detection value input from the spout sensor 23a to the CPU 100a during P / 4 to 3P / 4 is the detection value when the grain is being put into the grain tank 4 by the blade plate 23b. , 0 to P / 4 and 3P / 4 to P, the detection value input from the spout sensor 23a to the CPU 100a is the detection value when the grain is not put into the grain tank 4 by the blade 23b. is there.

  Therefore, the value obtained by integrating the detection values of the spout sensor 23a between P / 4 and 3P / 4 (the area of the hatched portion of the broken line in FIG. 7A) is the impulse by the grains in contact with the spout sensor 23a. It corresponds to. On the other hand, the value obtained by integrating the detection values of the spout sensor 23a between 0-P / 4 and 3P / 4-P (the area of the solid hatched portion in FIG. 7A) is a field with vibration of the engine 40 and unevenness. This corresponds to a disturbance such as vibration propagated to the spout sensor 23a during traveling and a steady deviation due to the characteristics of the spout sensor 23a.

  The CPU 100a performs necessary processing on a value obtained by integrating the detection values of the spout sensor 23a between 0 to P / 4 and 3P / 4 to P in a predetermined cycle (for example, 1 [s]), and accesses the EEPROM 100d. And stored in the correction variable X.

  The CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 23a between P / 4 and 3P / 4. Then, the steady deviation included in the integrated value is removed using the value stored in the correction variable X. For example, the value stored in the correction variable X is subtracted from the integrated value.

  The CPU 100a stores the correction value D from which the steady deviation is removed in the RAM 100c. And the coefficient (beta) is applied to the correction value D, and the grain quantity stored in the grain tank 4 is calculated | required.

  Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 8 is a flowchart showing the grain amount calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether or not the cutting switch 80 is turned on (step S1), and waits until the cutting switch 80 is turned on (step S1: NO). When the cutting switch 80 is on (step S1: YES), the CPU 100a takes in a signal from the engine speed sensor 40a (step S2). The CPU 100a accesses the EEPROM 100d and refers to the LUT 100h (step S3), and determines a coefficient β (β1 to β6) corresponding to the engine speed indicated by the signal taken from the engine speed sensor 40a (step S4).

  Then, the CPU 100a takes in signals from the pickup sensor 51 and the outlet sensor 23a (step S5) and integrates impulses between P / 4 to 3P / 4 (step S6). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 23a between P / 4 and 3P / 4. The detection values are sequentially input from the spout sensor 23a to the control unit 100 at a constant sampling period. The CPU 100a refers to the time stamp to input between P / 4 and 3P / 4. The detected value can be recognized.

  Next, the CPU 100a accesses the EEPROM 100d, refers to the correction variable X (step S7), corrects the calculated impulse with the correction variable X (step S8), and obtains a correction value D. For example, the CPU 100a subtracts the value stored in the correction variable X from the calculated impulse. Note that subtraction is an example of correction, and multiplication or division may be performed based on a value stored in the correction variable X.

  Then, the CPU 100a applies the coefficient β to the correction value D (Step S9). For example, the correction value D is multiplied or added by the coefficient β. The multiplication or addition of the coefficient β is an example of application of the coefficient β, and is not limited to this. Next, the CPU 100a integrates the correction value D after applying the coefficient β (step S10). The integrated value in step S10 corresponds to the grain amount stored in the grain tank 4. Then, the CPU 100a takes in a signal from the cutting switch 80, determines whether the cutting switch 80 is off (step S11), and waits until the cutting switch 80 is turned off (step S11: NO). When the cutting switch 80 is off (step S11: YES), the CPU 100a ends the process. In addition, the grain amount calculation process mentioned above can be performed as a real-time process performed within the period P.

  The CPU 100a waits until the time until the grain processed in the handling cylinder 11 is carried out to the grain tank 4 after the cutting switch 80 is turned off after step S10, and the amount of grain The arithmetic processing may be terminated.

  Next, correction value calculation processing by the CPU 100a will be described. FIG. 9 is a flowchart showing correction value calculation processing by the CPU 100a.

  The CPU 100a takes in a signal from the cutting switch 80, determines whether the cutting switch 80 is turned on (step S21), and waits until the cutting switch 80 is turned on (step S21: NO). When the cutting switch 80 is on (step S21: YES), signals are taken from the pickup sensor 51 and the spout sensor 23a (step S22), and the impulses between 0-P / 4 and 3P / 4-P are integrated. (Step S23). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detected values of the outlet sensor 23a between 0-P / 4 and 3P / 4-P. Note that the detection values are sequentially input from the spout sensor 23a to the control unit 100 at a constant sampling cycle, and the CPU 100a refers to the time stamp to determine between 0-P / 4 and 3P / 4-P. Can be recognized.

  Then, the CPU 100a performs a predetermined process on the integrated value (step S24). For example, a predetermined function set in advance in the EEPROM 100 d is applied in accordance with an input from the operation switch 82 or by multiplying a coefficient considering the variation rate. Next, the CPU 100a stores the processed value in the correction variable X (step S25).

  The CPU 100a starts to elapse with a built-in timer and waits for a predetermined time, for example, 1 [s] (step S26: NO). When the predetermined time has elapsed (step S26: YES), the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S27). When the cutting switch 80 is on (step S27: NO), the CPU 100a resets the timer (step S28) and returns the process to step S22. When the cutting switch 80 is off (step S27: YES), the CPU 100a ends the process.

  When the push switch 4c is pressed by the stored grain, that is, when the push switch 4c is turned on, the CPU 100a performs an alarm process. FIG. 10 is a flowchart for explaining alarm processing by the CPU 100a. The alarm process is executed as an interrupt process.

  The CPU 100a takes in a signal from the push switch 4c and waits until the push switch 4c is turned on (step S31: NO). When the push switch 4c is on (step S31: YES), a lighting signal is output to the warning lamp 84 (step S32). Then, the CPU 100a elapses with a timer and waits until a predetermined time elapses (step S33: NO). After a predetermined time has elapsed (step S33: YES), the CPU 100a takes in signals from the cutting switch 80 and the threshing switch 85, and determines whether or not the threshing clutch 44 is disconnected (step S34). When the off signal is input from the reaping switch 80 and the threshing switch 85, the threshing clutch 44 is disconnected, and when the on signal is input from the reaping switch 80 or the threshing switch 85, the threshing clutch 44 is connected. Match.

  When the threshing clutch 44 is disconnected (step S34: YES), that is, when the reaping switch 80 and the threshing switch 85 are off, the CPU 100a ends the process. In this case, it is considered that the user noticed that the grain tank 4 is full by turning on the warning lamp 84 and turned off the cutting switch 80 and the threshing switch 85.

  When the threshing clutch 44 is engaged (step S34: NO), the CPU 100a outputs a disconnection signal to the threshing clutch 44 and the reaping clutch 46 (step S35). In addition, before performing step S35, you may output to the display part 83 the signal which displays that the threshing clutch 44 and the mowing clutch 46 are forcedly cut | disconnected. In step S32, an alarm sound may be emitted from the buzzer, or the display unit 83 may display that the storage tank 4 is full.

  CPU100a outputs the display signal which displays the grain amount stored in the grain tank 4 and the storage rate to the display part 83 based on the value after correction | amendment integrated | accumulated in step S9. FIG. 11 is an example showing a display screen of the display unit 83 that displays the amount of grains stored in the grain tank 4 and the storage rate.

  As shown in FIG. 11, the display screen of the display unit 83 has a rectangular tank part 83 a that is long in the vertical direction schematically representing the grain tank 4 and a storage rate indicating the storage rate of the grain tank 4. Display portion 83b is displayed. A triangular index 83c filled with white or black is displayed next to the tank portion 83a.

  As the integrated corrected value increases, the CPU 100a colors the inside of the tank portion 83a, issues a command to the display portion 83 so that the colored portion becomes longer in the vertical direction, and also stores the storage rate display portion 83b. A command to increase the storage rate shown in FIG. In addition, a command is issued to the display unit 83 to change the display position of the white triangular index from one side to the other (from the lower side to the upper side in FIG. 11) along the vertical direction.

  When a command for setting an index is input from the index setting switch 81 while cutting is being performed, the CPU 100a is an index filled with black at the same position as the white index 83c when the command is input. A command to display 83c is issued. In FIG. 11, two indexes 83c filled with black are displayed.

  Next, the index setting process by the CPU 100a will be described. FIG. 12 is a flowchart showing the index setting process by the CPU 100a. It is assumed that the combine harvests the cereal and the display unit 83 displays a tank unit 83a, a storage rate display unit 83b, and an index 83c.

  The CPU 100a waits until an ON signal is input from the index setting switch 81 (step S41: NO). When the ON signal is input from the index setting switch 81 (step S41: YES), a signal for displaying the index 83c filled with black is displayed at the same position as the white index 83c at the white time point when the ON signal is input. It outputs to the part 83 (step S42). At this time, the display unit 83 displays the index 83c filled with black at the same position as the white index 83c at the white time when the ON signal is input, and holds the display.

  Next, the CPU 100a stores information indicating that the index has been set in the EEPROM 100d in association with the integrated corrected value (step S43). Then, the CPU 100a takes in a signal from the cutting switch 80 and determines whether or not the cutting switch 80 is off (step S44). When the cutting switch 80 is on (step S44: NO), the CPU 100a returns the process to step S41. When the cutting switch 80 is off (step S44: YES), the CPU 100a returns the process to step S41.

  When the CPU 100a receives a predetermined operation signal from the operation switch 82 after the cutting is finished (after the cutting switch 80 is turned off), the CPU 100a outputs a display command corresponding to the operation signal to the display unit 83.

  FIG. 13 is a diagram illustrating an example of a display screen displayed on the display unit 33 at the time when cutting is completed. As shown in FIG. 13, when the cutting is finished (when it is determined in step S44 that the cutting switch 80 is off), the CPU 100a issues a command to change the white index 83c to the black index 83c. . At this time, the display unit 83 changes the white index 83c to the black index 83c and displays it.

  FIG. 14 is a diagram illustrating an example of a display screen that displays the total storage amount stored in the grain tank 4. In response to an operation signal from the operation switch 82, the CPU 100a issues a command for displaying a selection frame 83d surrounding the index 83c to the operation unit 83. Then, as shown in FIG. 14, when the selection frame 83d is moved to the uppermost index 83c by the operation signal from the operation switch 82 and the selection of the uppermost index 83c is determined, the storage rate display is performed. Instead of the storage rate, the display unit 83 issues a signal for displaying the storage amount. At this time, the total storage amount is displayed in the storage rate display portion 83b.

  FIG. 15 is an example of a display screen that displays the storage amount in the range indicated by the index 83 c in the total storage amount stored in the grain tank 4. In response to an operation signal from the operation switch 82, the CPU 100a issues a command for displaying selection frames 83d and 83d surrounding the two indicators 83c and 83c from the plurality of indicators 83c to the operation unit 83. When the selection of the indicators 83c and 83c by the selection frames 83d and 83d is determined by the operation signal from the operation switch 82, the CPU 100a accesses the EEPROM 100d and adds the corrected values (corresponding to the indicators 83c and 83c) ( Referring to step S43), the display unit 83 issues a command to display the storage amount in the range indicated by the indicators 83c and 83c on the storage rate display unit 83b. At this time, the display unit 83 displays the storage amount in the range between the indexes 83c and 83c.

  By displaying the storage amount in the range sandwiched between the indicators 83c and 83c, it is possible to recognize the harvest amount in the field within the predetermined range. Therefore, the user divides the field into a plurality of ranges by setting the index 83c, confirms the yield within the divided ranges, and improves the amount of fertilizer and soil necessary for the next cultivation. Etc., and precise agriculture (so-called precision farming) can be performed. In addition, when the user contracts a harvesting operation, the user can recognize the harvest amount for each farm field contracted.

  In the combine according to the embodiment, the influence of disturbance is suppressed from the detection result of the spout sensor 23a by correcting the detection result of the spout sensor 23a based on the rotational speed of the first screw conveyor 23. The amount of grain stored in the grain tank 4 can be detected with high accuracy. The spout sensor 23a is a pressure sensor, and the pressure from the grain acting on the pressure sensor varies depending on the number of rotations of the screw conveyor 23, even if the grain amount is the same, but the difference is corrected. Therefore, the detection accuracy of the spout sensor 23a can be increased.

  Moreover, the period (0-P / 4 and 3P / 4-P of the period in which the grain is not thrown into the grain tank 4 in the period P of one rotation of the blade 23b provided at the front end of the screw conveyor 23. It can be determined that the detection result detected during the period is a disturbance. Therefore, the influence of disturbance is removed from the detection result of the spout sensor 23a by obtaining the detection result detected while the grain is being put into the grain tank 4 (between P / 4 and 3P / 4). Thus, the amount of the grain stored in the grain tank 4 can be detected with high accuracy.

  The detection result detected during the period when the grain is not put into the grain tank 4 (between 0-P / 4 and 3P / 4-P) is due to disturbances and steady deviations such as the characteristics of the spout sensor 23a. Therefore, the accuracy of the detection result of the spout sensor 23a can be improved by removing the steady deviation using the detection result.

  In addition, when a predetermined amount of grains is stored in the grain tank 4, for example, when the grains are full, the user is notified. For this reason, the user can immediately terminate the harvesting after notifying the warning.

  Further, when a predetermined amount of grains is stored in the grain tank 4, for example, when the grains are full, the harvesting clutch 46 is disconnected, and the harvesting is forcibly terminated. Therefore, excessive storage in the grain tank 4 can be prevented, and damage to the combine can be prevented.

  The embodiment described above is an exemplification of the present invention, and the present invention can be implemented in variously modified forms within the scope determined based on the description of the claims.

2 Threshing device 4 Grain tank (storage part)
4c Press switch (reserved amount detection means)
11 Handling cylinder 23 First screw conveyor (screw conveyor)
23a Spout sensor (grain detection means)
23b Blades 40 Engine (drive source)
44 Threshing clutch (clutch)
51 Pickup sensor (rotation speed detection means)
100 control unit 100a CPU
100b ROM
100c RAM
100d EEPROM
100h LUT

Claims (5)

A threshing device for threshing the harvested cereal, a storage unit for storing grains threshed by the threshing device, a screw conveyor for conveying the grains from the threshing device to the storage unit, and the screw conveyor In a combine equipped with a grain amount detection means for detecting the amount of grain conveyed
A rotational speed detection means for detecting the rotational speed of the screw conveyor;
A combiner, comprising: a correction unit that corrects the detection result of the grain amount detection unit based on the detection result of the rotation number detection unit. A blade that projects the grain into the storage part protrudes from the shaft part at the end of the screw conveyor,
The blades are adapted to intermittently throw grains into the reservoir in synchronization with the rotation period of the screw conveyor,
The grain amount detection means is adapted to detect pressure due to contact of an object,
The correction means includes
Means for obtaining a rotation period of the screw conveyor based on a detection result of the rotation speed detection means;
An integrating means for integrating the detection results of the grain amount detecting means detected during a contact period in which the grains introduced from the blades included in the rotation period are in contact with each other. Item 1. A combine according to item 1. The correction means includes
And a means for removing a steady deviation included in the integration result of the integration means based on a detection result of the grain amount detection means detected in a period outside the contact period included in the rotation period. The combine according to claim 2. Reservation amount detection means for detecting the amount of grain stored in the storage unit,
The combine according to any one of claims 1 to 3, further comprising means for notifying an alarm when the storage amount detection means detects a predetermined amount of grain. A drive source for supplying power to the threshing device;
A clutch for interrupting transmission of power from the drive source to the threshing device;
Reservation amount detection means for detecting the amount of grain stored in the storage unit,
The combine according to any one of claims 1 to 4, further comprising: means for disengaging the clutch when the storage amount detection means detects a predetermined amount of grain.

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