WO2013012080A1 - Combine - Google Patents

Abstract

The objective of the present invention is to provide a combine that can eliminate the effect of disturbance from grain quantity detection values, even during a period of contact in which grain contacts a sensor. The impact force detected by a discharging opening sensor is compared with a pre-set threshold (α). On the basis of the comparison results, it is determined whether or not the impact force is included in the subject of calculation. For example, if the impact force is less than the threshold (α), the impact force is removed from being a subject of calculation. As a result, particularly when a small quantity of grain is being conveyed (for example, in the case of harvesting work being performed at a low speed or the case of a hand-threshing mode), it is possible to improve the calculation precision of the amount of grain. If the amount of grain conveyed is small, the effect of disturbance on the calculated amount of grain is larger than when the amount of grain conveyed is large.

Description

Combine

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

When harvesting in the field, combine harvesters are often used to harvest and thresh cereals and to recover grains. 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).

The vibration of the engine and the vibration generated by traveling on the uneven field propagate to the grain amount detection sensor. These vibrations become disturbances and affect the output of the grain amount detection sensor.

In recent years, the detection period of the grain amount detection sensor is set, and the detection value detected in the contact period in which the grains included in the detection period should contact is based on the detection value detected in the non-contact period. Has been proposed (see Non-Patent Document 1).
Japanese Patent Laid-Open No. 2005-24381 Koichi Shoji and two others, "On-site calibration method for yield sensor with nonlinear characteristics-About accuracy improvement by installing electromagnetic pickup", ISMAB 2010 FUKUOKA, April 5, 2010

Even if the grain is not being conveyed by the screw conveyor, the detected value from the grain quantity detection sensor during the contact period due to disturbances such as the temperature characteristics of the grain quantity detection sensor, wind pressure by the blades, and the inclination of the vehicle body May be output.

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 detected value of a grain amount also in a contact period.

The combine according to the present invention includes a threshing device that threshs the harvested cereal, a storage unit that stores the grain threshed by the threshing device, and a conveyance that conveys the grain from the threshing device to the storage unit. A combine comprising: a means; a detecting means for detecting an impact force caused by the grain conveyed by the conveying means; and a calculating means for calculating a grain amount based on the impact force detected by the detecting means. The calculating means determines whether or not the impact force detected by the detecting means is greater than a preset threshold value, and calculates the detected impact force based on the determination result of the determination means. And determining means for determining whether or not to use for calculation in the calculating means.

In the present invention, the impact force detected by the detection means is compared with a preset threshold value. Based on the comparison result, it is determined whether or not to include the impact force in the calculation target. For example, when the impact force is smaller than the threshold value, it is removed from the target to be calculated.

In the combine according to the present invention, the conveying means is a screw conveyor, and a blade plate is provided on the shaft portion at the end of the screw conveyor to inject the grain into the storage portion, and the detecting means is used as the blade plate. It is arranged to face each other.

In the present invention, the detection means is opposed to the slats, and the grains put in from the slats abut on the detection means reliably.

In the combine according to the present invention, the calculating means has an integrating means for integrating the impact force detected during a period when the grain introduced from the blades should collide with the detecting means, and the integrated value is obtained. Based on the above, the grain amount is calculated, and the determination unit is configured to determine whether or not the impact force is greater than the threshold value in the period, and the determination unit includes the determination unit The impact force determined to be larger than the threshold value by the determination means is determined to be used for integration by the integration means.

In the present invention, only the impact force determined to be greater than the threshold value is integrated during the period when the grain should collide with the detection means. Thereby, the influence of the disturbance in the said period is removed.

In the combine according to the present invention, the calculating means includes an integrating means for integrating the impact force detected during a period when the grain put in from the blades should collide with the detecting means, and the integrated value is obtained. Based on the above, the grain amount is calculated, and the determination unit is configured to determine whether or not the impact force is greater than the threshold value in the period, and the determination unit includes the determination unit When the determination means determines that the impact force detected at an arbitrary point in the period is greater than the threshold, the determination is made to use the impact force detected within the period for integration by the integration means. It is characterized by the above.

In the present invention, when it is determined that the impact force detected at an arbitrary time point in the period is larger than the threshold value, all impact forces detected in the period are included in the accumulation target. Thereby, the influence of the disturbance in the said period is removed.

The combine according to the present invention comprises: a rotation speed detection means for detecting the rotation speed of the screw conveyor; and a means for obtaining a rotation period of the screw conveyor based on a detection result of the rotation speed detection means. The period during which the grain input from the vehicle should collide with the detection means is included in one rotation cycle.

In the present invention, the determination is executed every one rotation period of the blades, and the disturbance is eliminated during the period.

The combine according to the present invention is characterized in that the calculating means has means for removing a steady deviation included in the integration result of the integrating means based on the impact force of the detecting means detected outside the period. To do.

In the present invention, the impact force detected during the non-contact period in which the grain thrown in from the blade is not in contact with the detection means is a steady deviation caused by vibration or the like, and is excluded from the integration result.

In the combine according to the present invention, the transport unit includes a rotary input unit that inputs grains into the storage unit, and a rotation period detection unit that detects a rotation period of the input unit, and the rotation period detection unit Identifying means for specifying a point in time when the peak value of the impact force is detected by the detecting means during one rotation cycle detected in the above, and a point in time when the peak value is detected by the specifying means is one rotation cycle And an informing means for informing that the time is outside the predetermined time zone when the time is outside the predetermined time zone.

In the present invention, since it is considered that the grain is in contact with the detecting means before and after the peak value of the impact force is detected, the peak value deviates from a predetermined time zone in one rotation cycle. The amount of grain stored in the grain tank cannot be calculated accurately. Therefore, when the detection point of the peak value deviates from the predetermined time zone, the fact is notified to the user.

The combine according to the present invention is such that the calculating means calculates a grain amount based on a detection value detected by the detecting means during a predetermined calculation target period in the one rotation cycle, When the time point when the peak value is detected by the means is outside a predetermined time zone, the calculation target period is changed.

In the present invention, when the detection time of the peak value deviates from the predetermined time zone, the calculation target period is changed, and the grain amount based on the impact force detected by the detecting means during the changed calculation target period Is calculated. Thereby, calculation of the amount of grains can be continued.

The combine according to the present invention is characterized by comprising change notification means for notifying that the change of the calculation target period is being executed when the calculation means changes the calculation target period.

In the present invention, when the calculation target period is changed, it is possible to notify the user to that effect and prompt the serviceman to repair or adjust the detection means after the harvesting is completed.

The combine according to the present invention is characterized in that the charging section is a bucket rotating around a blade plate or a sprocket rotating around a rotation axis.

In the present invention, the peak value is detected from a predetermined time zone, regardless of whether the blade is provided in the tip of the screw conveyor or the rotary bucket is used for inputting the grain into the storage unit. The user can be notified of the departure.

In the present invention, the impact force detected by the detection means is compared with a preset threshold value. Based on the comparison result, it is determined whether or not to include the impact force in the calculation target. For example, when the impact force is smaller than the threshold value, it is removed from the target to be calculated. Therefore, especially when a small amount of grain is being conveyed (for example, when cutting at low speed or in the handling mode), the calculation accuracy of the grain amount can be improved. When the amount of grain transport is small, the influence of disturbance on the calculated amount of grain is greater than when the amount of grain transport is large.

In the present invention, the detection means is opposed to the slats, and the grains thrown in from the slats reliably contact the detection means. Even if disturbances such as wind pressure due to the slats affect the impact force, as long as it is designed to eliminate the detection value due to the disturbances, it can be placed at any position facing the slats. Is possible.

In the present invention, only the impact force determined to be larger than the threshold value is accumulated during the period when the grain should collide with the detection means. Thereby, the disturbance can be accurately removed within the period.

In the present invention, when it is determined that the impact force detected at an arbitrary time point in the period is larger than the threshold value, all impact forces detected in the period are included in the integration target. Thereby, the disturbance can be accurately removed within the period.

In the present invention, it is possible to accurately perform the removal of disturbance during a period in which the grain should collide with the detection means by executing the determination every rotation cycle of the blades.

In the present invention, the value detected during the period when the grain thrown in from the blade does not collide with the detection means is a steady deviation caused by vibration or the like, and by removing this from the integration result, the grain The amount detection accuracy can be further improved.

1 is an external perspective view of a combine according to Embodiment 1. FIG. 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 longitudinal cross-sectional view which outlines a grain tank. 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 of the graph which shows the relationship between the detected value of the spout sensor in the combine which concerns on Embodiment 2, and the detected value of a pickup sensor. It is a flowchart which shows the grain amount calculation process by CPU. It is a longitudinal cross-sectional view which shows schematically the spout sensor in the combine which concerns on Embodiment 3. FIG. It is a block diagram which shows the structure of a control part. It is an example of the graph which shows the relationship between the detected value of the spout sensor located in a 1st area | region, and the detected value of a pickup sensor. It is an example of the graph which shows the relationship between the detection value of a spout sensor, and the detection value of a pickup sensor when a collision board inclines downward. It is a flowchart which shows the grain amount calculation process by CPU. It is a flowchart which shows the peak value specific process by CPU. It is an expanded plane sectional view which shows the deformed blade board schematically. It is an internal side surface block diagram which expands and schematically shows the bucket type elevator and grain tank of the combine which concerns on Embodiment 4. FIG. It is an internal side block diagram which expands and schematically shows the grain tank which has a bucket type elevator and a spout sensor inside.

2 Threshing device 4 Grain tank (storage part)
4c Push-type switch 11 Handling cylinder 23 First screw conveyor (conveying means, screw conveyor, feeding part, rotating shaft)
23b Blades 40 Engine 44 Threshing clutch 51 Pickup sensor (rotational speed detection means)
83 Display section (notification means, change notification means)
86 Notification lamp (notification means)
100 control unit (calculation means, identification means)
100a CPU
100b ROM
100c RAM
100d EEPROM
100h LUT
144 Bucket type elevator 150 Leveling disc (loading part)
152 Blade 153 Rotating shaft 300 Throwing sensor (detection means)
503, 504 Sprocket 506 Bucket

(Embodiment 1)
Hereinafter, the present invention will be described in detail based on the drawings showing the combine according to the first 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 distinguishing between a reaped cereal and a non-reached cereal, a cutting blade 3b for reaping the cereal, and a raising device 3c for causing the cereal. 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 that clamps the cereal grains, 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, an upper transport 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 airframe 9 travels by driving the traveling 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 through the upper conveying device 7, the feed chain 5 and the clamping member 6, and threshed in the threshing device 2.

2 is a side sectional view schematically showing the internal configuration of the threshing apparatus 2, FIG. 3 is a plan sectional view schematically showing the grain tank 4, and FIG. 4 is a longitudinal 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.

A rocking sorting device 16 for sorting grains and straws is provided below the crimp net 15. 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 shaft portion 23 c and the blade plate 23 b are accommodated in the casing 140. The casing 140 includes a U-shaped side surface 141 in plan view covering the periphery of the shaft portion 23c and the blade plate 23b. The side surface 141 is opposed to the side surface (the spout 4b) of the grain tank 4 with the shaft portion 23c and the blade plate 23b interposed therebetween. In the grain tank 4, a push switch 4c is provided near the lower side of the spout 4b.
One end of the side surface 141 forms a guide surface 141a for guiding the grain. The other end of the side surface 141 forms a non-guide surface 141b that faces the guide surface 141a. The guide surface 141a is inclined at an acute angle with respect to the side surface of the grain tank 4, and extends in a direction opposite to the non-guide surface 141b. The dimension between the first screw conveyor 23 and the guide surface 141a is larger than the dimension between the first screw conveyor 23 and the non-guide surface 141b.

As shown in FIG. 3, L1 is a line located on the guide surface 141a and a surface obtained by extending the guide surface 141a. L2 is the outermost tangent line of the screw conveyor 23 that intersects L1 at an angle of 30 degrees between the shaft portion 23c and the guide surface 141a. In the grain tank 4, the region sandwiched between L1 and L2 is defined as the first region (see the solid line hatching in FIG. 3), and the region opposite to the first region with respect to L2 is defined as the second region (FIG. 3).

As shown in FIG. 3, a spout sensor 300 that detects an impact value of a grain that is input from the spout 4b to the grain tank 4 is disposed in the second region. As shown in FIG. 4, a support member 310 is suspended from the top surface of the grain tank 4, and the spout sensor 300 is fixed to the support member 310. The spout sensor 300 is disposed above the lower edge of the spout 4b. Moreover, when the grain tank 4 becomes full, it is located above the upper surface of the grain stored in the grain tank 4. In other words, the spout sensor 300 is arranged at the vertical position and the depth position that are not buried in the grain when full.

In FIG. 3, most of the extruded grain moves along the guide surface 141a and spreads horizontally in the first region in the grain tank 4 as indicated by the broken arrow and the circle near the guide surface 141a. It is put in a continuous belt shape. In FIG. 3, as shown by the dashed arrow and the circle in the vicinity of the first screw conveyor 23, the remaining grains are discretely thrown into the second region in the grain tank 4.

In the first region, the grains that move along the guide surface 141a, the grains that bounce off the guide surface 141a, and the like are continuously put into the grain tank 4. In addition, since it contacts the guide surface 141a, a grain is thrown in and thrown in. On the other hand, in the second region, the grain is directly put into the grain tank 4 from the blade 23b. Therefore, the grain does not come into contact with the guide surface 141a unlike the grain thrown into the first region, so that the grain is hardly decelerated and is thrown at a high speed in a discrete state.

Also, the upward force from the first screw conveyor 23 acts on the grain. As shown by the broken line arrow in FIG. 4, the grain moves obliquely upward by the combination of the upward force and the lateral force from the blade 23b.

Since the spout sensor 300 is disposed in the second region, a small amount of discrete grains momentarily collide with the spout sensor 300. In addition, when the spout sensor 300 is arrange | positioned in the 1st area | region, the grain continuously spread horizontally collides with the spout sensor 300. FIG.

The grain is intermittently charged into the grain tank 4 from the spout 4b by the rotation of the blade 23b. When the input grain collides with the spout sensor 300, a voltage is output from the strain gauge, and the amount of the grain is calculated based on the output voltage. The spout sensor 300 only needs to have a configuration that can detect the impact value of the abutted grain. For example, a piezoelectric element may be provided instead of the strain gauge.

In FIG. 3, the angle formed by L1 and L2 is 30 degrees, but the angle formed by L1 and L2 is not limited to this. L2 should just be a line which distinguishes the 1st area | region where a grain collides with the spout sensor 300 continuously, and the 2nd area | region which collides instantaneously, The angle which L1 and L2 make is suitably according to design. Selected.

The grain that has dropped from the grain sieve 20 onto the first grain plate 22 slides down toward the first screw conveyor 23. The dropped grain is conveyed by the screw conveyor 23 first. Centrifugal force acts on the grain, and the grain ascends along the outer periphery of the screw conveyor 23 first. As indicated by the solid line arrow in FIG. 3, the blade 23b rotates from the non-guide surface 141b side toward the guide surface 141a side (rotates counterclockwise in FIG. 3). The slat 23b pushes the grain toward the spout 4b.

As shown by the broken line arrows in FIG. 3, when the input grain comes into contact with the spout sensor 300, a voltage is output from the strain gauge, and the spout amount is detected based on the output voltage.

As shown in FIG. 2, an inclined plate 24 inclined downward toward the rear is connected to the rear portion of the first grain plate 22. A second grain plate 25 inclined downward toward the front 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.

The fallen object that has fallen onto the inclined plate 24 or the second grain plate 25 from the through hole of the Strollac 19 slides 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 carp 27 for performing 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 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.

The exhaust port 33 and the exhaust passage 37 are respectively provided with discharge amount sensors 34 and 34 each including a piezoelectric element. 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.

A downcomer 35 inclined downward and forward is provided above the upper suction cover 31 and below the processing chamber 13. 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. 5 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

As shown in FIG. 5, 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 a 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 cereals are 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

A control unit that calculates the amount of grain stored in the grain tank 4 based on outputs from the spout sensor 300, the engine speed sensor 40a, and the pickup sensor 51 is mounted on the combine. FIG. 6 is a block diagram showing the configuration of the control unit, and FIG. 7 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 Memory and Programmable Read Only Memory) 100d that are interconnected 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 indicating the relationship between the engine speed and the coefficient β (see FIG. 7). The table includes an “engine speed” field and a “coefficient β” field, and each line of each field 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.

Further, a correction variable X is set in the EEPROM 100d, and a value is stored in the correction variable X as necessary. Further, a threshold value α for determining whether or not the detection value of the spout sensor 300 is included in the calculation target of the grain amount is set.

Control unit 100 outputs a connection signal to mowing clutch 46 and threshing clutch 44 via 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 300, the push switch 4c, the pickup sensor 51, the engine speed sensor 40a, and the threshing switch 85 are input to the control unit 100 via the input interface 100e. Has been entered.

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 300, and determines whether or not to include in the integration target by comparing with the threshold value α. The detection value included in the integration target is stored in the EEPROM 100d in synchronization with the detection value related to the output signal of the pickup sensor 51. FIG. 8 is an example of a graph showing the relationship between the detection value of the spout sensor 300 and the detection value of the pickup sensor 51.

FIG. 8A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number. FIG. 8B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in the figure is omitted as appropriate.

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 300 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 300 when the pulse wave is input. To remember.

In FIG. 8, when the grain is put into the grain tank 4 by the blade 23b, the detection value due to the collision of the grain is inputted from the spout sensor 300 to the CPU 100a between P / 4 to 3P / 4. The The detection value input from the spout sensor 300 to the CPU 100a between 0 to P / 4 and 3P / 4 to P is a detection value when the grain does not collide with the spout sensor 300.

8A, the threshold value α corresponds to a detection value detected by the spout sensor 300 due to disturbances such as temperature characteristics of the spout sensor 300, wind pressure by the blades 23b, and inclination of the airframe 9. When the grain is not put into the grain tank 4 by the blade 23b, ideally, the detection value due to the collision of the grain is input from the spout sensor 300 to the CPU 100a during P / 4 to 3P / 4. Not. However, actually, a detection value (threshold value α) due to disturbance (for example, wind pressure by the blade 23b) is input from the spout sensor 300 to the CPU 100a.

The CPU 100a compares the detection value input from the spout sensor 300 during the period P / 4 to 3P / 4 with the threshold value α. When the detected value includes a value exceeding the threshold value α, the CPU 100a determines that the detected value input between P / 4 to 3P / 4 is to be integrated (period P1 in FIG. 8A). , Area of broken line hatched portion at P2 and P5). The value to be integrated corresponds to the impulse by the collision of the grain with the spout sensor 300.

When the detected value does not include a value that exceeds the threshold value α, the CPU 100a excludes the detected value input between P / 4 to 3P / 4 from the objects to be integrated (in FIG. 8A, the period P3 And P4 part).

On the other hand, a value obtained by integrating the detection values of the spout sensor 300 between 0 to P / 4 and 3P / 4 to P (area of the solid line hatched portion in FIG. 8A) corresponds to a steady deviation. The steady deviation is caused by vibration of the engine 40, vibration propagated to the spout sensor 300 while traveling on a rough field, characteristics of the spout sensor 300, and the like.

The CPU 100a performs necessary processing on the value obtained by integrating the detection values of the spout sensor 300 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 300 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.

CPU100a memorize | stores the correction value D which removed the stationary deviation in RAM100c. And the coefficient (beta) is applied to the correction value D, and the grain quantity stored in the grain tank 4 is calculated | required.

In addition, when the spout sensor 300 is arrange | positioned at the guide surface 141a side (1st area | region), since a grain collides with the spout sensor 300 over the whole period P, a steady-state deviation cannot be removed.

As shown in FIG. 3, in the first region in the grain tank 4, a band-like grain group that is continuous in a lateral direction is input. Therefore, when the spout sensor 300 is arranged in the first region, the grain collides with the spout sensor 300 continuously during the period P. In other words, the grains collide between 0 to P / 4 and 3P / 4 to P, which should not have collided with the spout sensor 300.

In order to use the detected values between 0-P / 4 and 3P / 4-P for correction to remove the steady-state deviation, the grain is spouted between 0-P / 4 and 3P / 4-P. It should be considered that the sensor 300 does not collide or is not colliding. However, during 0 to P / 4 and 3P / 4 to P, the grains continuously collide with the spout sensor 300, and the detected values between 0 to P / 4 and 3P / 4 to P are It cannot be used for correction to remove steady-state deviation.

Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 9 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 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). Then, 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 fetched from the engine speed sensor 40a (step S4).

Then, the CPU 100a takes in signals from the pickup sensor 51 and the spout sensor 300 (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 300 between P / 4 and 3P / 4. The detection values are sequentially input from the spout sensor 300 to the control unit 100 at a constant sampling cycle, and the CPU 100a refers to the time stamp to input between P / 4 to 3P / 4. The detected value can be recognized.

Next, the CPU 100a determines whether or not the detection value input between P / 4 to 3P / 4 includes a detection value that exceeds the threshold value α (step S7). When the detected value exceeding the threshold value α is not included (step S7: NO), the CPU 100a advances the process to step S12.

When the detected value exceeding the threshold value α is included (step S7: YES), the CPU 100a accesses the EEPROM 100d, refers to the correction variable X (step S8), and corrects the calculated impulse with the correction variable X ( Step S9), a correction value D is obtained. 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 S10). 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 S11). Note that the integrated value in step S <b> 11 corresponds to the amount of grain stored in the grain tank 4. 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 S12). When the cutting switch 80 is not off (step S12: NO), that is, when the cutting switch 80 is on, the CPU 100a returns the process to step S2. When the cutting switch 80 is off (step S12: 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. The determination in step S7 may be performed after step S5.

Next, correction value calculation processing by the CPU 100a will be described. FIG. 10 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 or not the cutting switch 80 is 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 acquired from the pickup sensor 51 and the spout sensor 300 (step S22), and the impulses between 0 to P / 4 and 3P / 4 to P are integrated. (Step S23). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between 0 to P / 4 and 3P / 4 to P. The detection values are sequentially input from the spout sensor 300 to the control unit 100 at a constant sampling cycle, and the CPU 100a refers to the time stamp to determine between 0 to P / 4 and 3P / 4 to P. Can be recognized.

Then, the CPU 100a performs a predetermined process on the accumulated 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 until a predetermined time, for example, 1 [s] elapses (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.

The CPU 100a executes an alarm process when the push switch 4c is pressed by the stored grain, that is, when the push switch 4c is turned on. FIG. 11 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 grain tank 4 is full.

In the combine according to the first embodiment, the impact force detected by the spout sensor 300 is compared with a preset threshold value α. Based on the comparison result, it is determined whether or not to include the impact force in the calculation target. For example, when the impact force is smaller than the threshold value α, the impact force is removed from the target to be calculated. Therefore, especially when a small amount of grain is being conveyed (for example, when cutting at low speed or in the handling mode), the calculation accuracy of the grain amount can be improved. When the amount of grain transport is small, the influence of disturbance on the calculated amount of grain is greater than when the amount of grain transport is large.

Further, the spout sensor 300 faces the blade plate 23b, and the grains thrown in from the blade plate 23b reliably come into contact with the spout sensor 300. Even if a disturbance such as wind pressure caused by the blade 23b affects the detection value of the outlet sensor 300, as long as the value due to the disturbance is designed to be removed, the outlet sensor 300 is placed at an arbitrary position facing the blade 23b. It is possible to arrange according to the specification.

Further, when it is determined that the impact force detected at an arbitrary time point in the period P / 4 to 3P / 4 is larger than the threshold value α, all the impact forces detected in the period P / 4 to 3P / 4 are targeted for integration. include. Thereby, the impact force detected by the collision of the grains can be included in the integration target without omission. As a result, it is possible to achieve both removal of disturbance and detection without leakage in the periods P / 4 to 3P / 4, and the detection accuracy can be improved.

In addition, the impact force detected between 0 and P / 4 and 3P / 4 and P is a steady deviation caused by vibration, etc., and by removing this from the integration result, the detection accuracy of the grain amount is further improved. Can be made.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing the combine according to the second embodiment. FIG. 12 is an example of a graph showing the relationship between the detection value of the spout sensor 300 and the detection value of the pickup sensor 51. FIG. 12A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number. FIG. 12B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b.

The CPU 100a compares the detection value input from the spout sensor 300 during the period P / 4 to 3P / 4 with the threshold value α. The CPU 100a determines that the detection value exceeding the threshold α is to be integrated among the detection values input between P / 4 to 3P / 4 (the broken line hatched portions in the periods P1, P2 and P5 in FIG. 12A). area). The value to be integrated corresponds to the impulse by the collision of the grain with the spout sensor 300. The CPU 100a excludes detection values that do not exceed the threshold value α from targets to be integrated.

Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 13 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 S41), and waits until the cutting switch 80 is turned on (step S41: NO). When the cutting switch 80 is on (step S41: YES), the CPU 100a takes in a signal from the engine speed sensor 40a (step S42). Then, the CPU 100a accesses the EEPROM 100d and refers to the LUT 100h (step S43), and determines a coefficient β (β1 to β6) corresponding to the engine speed indicated by the signal fetched from the engine speed sensor 40a (step S44).

Then, the CPU 100a takes in signals from the pickup sensor 51 and the spout sensor 300 (step S45) and integrates impulses between P / 4 to 3P / 4 (step S46). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between P / 4 and 3P / 4. The detection values are sequentially input from the spout sensor 300 to the control unit 100 at a constant sampling cycle, and the CPU 100a refers to the time stamp to input between P / 4 to 3P / 4. The detected value can be recognized.

Next, the CPU 100a determines whether or not the detection value input between P / 4 to 3P / 4 includes a detection value exceeding the threshold value α (step S47). When the detected value exceeding the threshold value α is not included (step S47: NO), the CPU 100a advances the process to step S53.

When the detected value exceeding the threshold value α is included (step S47: YES), the CPU 100a extracts the impulse related to the detected value exceeding the threshold value α (step S48). Next, the CPU 100a accesses the EEPROM 100d, refers to the correction variable X (step S49), corrects the extracted impulse with the correction variable X (step S50), and obtains a correction value D. For example, the CPU 100a subtracts the value stored in the correction variable X from the extracted 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 S51). 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 S52). The integrated value in step S52 corresponds to the amount of grain stored in the grain tank 4. 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 S53). When the cutting switch 80 is not off (step S53: NO), that is, when the cutting switch 80 is on, the CPU 100a returns the process to step S42. When the cutting switch 80 is off (step S53: 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 S52. The arithmetic processing may be terminated. Moreover, you may perform the process of step S47 and S48 after step S45. In this case, the detection value input from the spout sensor 300 is compared with the threshold value α, the detection value exceeding the threshold value α is extracted, and the impulse is obtained.

In the combine according to the second embodiment, only the impact force determined to be greater than the threshold value α is integrated during the period P / 4 to 3P / 4. As a result, the influence of the disturbance can be accurately and reliably removed from the impact force in the periods P / 4 to 3P / 4.

Of the configurations according to the second embodiment, the same reference numerals are given to the same configurations as those of the first embodiment, and detailed description thereof is omitted.

(Embodiment 3)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a combine according to a third embodiment. FIG. 14 is a longitudinal sectional view schematically showing the spout sensor 300. FIG. 14A shows the spout sensor 300 at a proper position, and FIG. 14B shows the spout sensor 300 at a position deviated from the proper position.

The spout sensor 300 includes a sensor main body 301 (fixed portion) including a strain gauge and a circuit board. The sensor main body 301 has a housing, and a strain gauge, a circuit board, and the like are accommodated in the housing. The housing rear surface of the sensor main body 301 is fixed to the support member 310 with a plurality of screws 311. The sensor body 301 may be configured to be able to detect the impact value of the collided grain. For example, a piezoelectric element may be provided instead of the strain gauge.

A steel plate 302 is provided in front of the sensor body 301. The steel plate 302 is provided with a collision plate 303 on which the grains collide. The spout sensor 300 has the collision plate 303 facing the spout 4b side.

The collision plate 303 is made of an elastic member and made of polyurethane, rubber or elastomer. The steel plate 302 is harder than the collision plate 303 and may be made of other metals such as aluminum or copper, or a resin such as polyethylene or vinyl chloride. By configuring the collision plate 303 with an elastic member, the wear resistance against the collision of the grains is improved. It also prevents grain damage during a collision.

The collision plate 303 is provided with a plurality of through-holes 303 a that receive the heads of the screws 304. The steel plate 302 is provided with a plurality of through holes 302a corresponding to the accommodation holes 303a. The through hole 302a has a smaller diameter than the accommodation hole 303a. The diameter of the screw portion of the screw 304 is slightly smaller than the diameter of the accommodation hole 303a. The diameter of the head of the screw 304 is larger than the diameter of the through hole 302a and smaller than the accommodation hole 303a.

A plurality of screws 304 are inserted into the housing holes 303 a and the through holes 302 a and screwed into the front surface of the housing of the sensor main body 301. The head of the screw 304 is locked to the peripheral portion of the through hole 302a. A steel plate 302 is sandwiched between the head of the screw 304 and the sensor body 301. The steel plate 302 is made of metal, and the stability of the spout sensor 300 is improved as compared with the case where a screw is locked to the collision plate 303 formed of an elastic member.

When the vibration of the engine and the vibration due to traveling in the field propagate to the spout sensor 300 for a long time, the spout sensor 300 may be rattled. For example, the screws 304 and 311 may be loosened. In this case, for example, as shown in FIG. 14B, the collision plate 303 is inclined downward. The time when the grain collides with the collision plate 303 is deviated from the initial setting time based on the posture shown in FIG. 14A. In the case of FIG. 14B, the grain collides with the collision plate 303 at a time earlier than the initial setting time. Even when the position of the spout sensor 300 at the initial setting is deviated from an appropriate position, the time when the grain collides with the collision plate 303 deviates from the original collision time.

FIG. 15 is a block diagram showing the configuration of the control unit 100. As described above, the control unit 100 includes the CPU 100a, the ROM 100b, the RAM 100c, and the EEPROM 100d that are connected to each other via the internal bus 100g.

The LUT 100h is stored in the EEPROM 100d. As described above, the LUT 100h stores a table indicating the relationship between the engine speed and the coefficient β (see FIG. 7). Further, a correction variable X and a threshold value α are set in the EEPROM 100d.

The control unit 100 outputs a lighting or extinguishing signal to the notification lamp 86 via the output interface 100f. In addition, the other code | symbol in the control part 100 attaches | subjects the same code | symbol as the combine described in Embodiment 1 or 2, and the detailed description is abbreviate | omitted.

As described above, the CPU 100a integrates the detection values related to the output signal of the spout sensor 300, and determines whether or not to include in the integration target by comparing with the threshold value α (see FIG. 8).

When the spout sensor 300 is arranged in the second region, it is possible to execute correction for removing the steady deviation. When the spout sensor 300 is arranged in the first region, it is impossible to execute correction for removing the steady deviation. The reason will be described below.

FIG. 16 is an example of a graph showing the relationship between the detection value of the spout sensor 300 located in the first region and the detection value of the pickup sensor 51. FIG. 16A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number.

16A shows the detection value of the spout sensor 300 located in the first region. A broken line waveform indicates a detection value of the spout sensor 300 located in the second region. FIG. 16B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in FIG. 16 is omitted as appropriate.

As shown in FIG. 3, in the first region in the grain tank 4, a band-like grain group that is continuous in a lateral direction is input. Therefore, when the spout sensor 300 is arranged in the first region, the grain collides with the spout sensor 300 continuously during the period P. In other words, the grains collide between 0 to P / 4 and 3P / 4 to P, which should not have collided with the spout sensor 300.

As shown in FIG. 16, in each period P1, P2, and P5 in which the grain is put into the grain tank 4, the detection values between 0 to P / 4 and 3P / 4 to P are indicated by two-dot chain lines. Larger than the detected value (the detected value of the spout sensor 300 located in the second region). This is because the grain collided between 0 to P / 4 and 3P / 4 to P, which should not have collided with the spout sensor 300.

In order to use the detected values between 0-P / 4 and 3P / 4-P for correction to remove the steady-state deviation, the grain is spouted between 0-P / 4 and 3P / 4-P. It should be considered that the sensor 300 does not collide or is not colliding. However, during 0 to P / 4 and 3P / 4 to P, the grains continuously collide with the spout sensor 300, and the detected values between 0 to P / 4 and 3P / 4 to P are It cannot be used for correction to remove steady-state deviation.

Also, when the position of the spout sensor 300 is deviated from an appropriate position, it is difficult to calculate the grain amount with high accuracy. The reason will be described below. For example, as shown in FIG. 14B, when the collision plate 303 is inclined downward, the grain collides with the collision plate 303 at a time earlier than the initial setting time based on the posture shown in FIG. 14A.

FIG. 17 is an example of a graph showing the relationship between the detection value of the spout sensor 300 and the detection value of the pickup sensor 51 when the collision plate 303 is inclined downward. FIG. 17A is a graph showing the relationship between time and the detection value of the spout sensor 300. The solid line in FIG. 17A shows the detection value of the spout sensor 300 when the collision plate 303 is inclined downward. A broken line waveform indicates a detection value of the spout sensor 300 when the spout sensor 300 is in an appropriate position. Note that two two-dot chain lines in FIG. 17A indicate a time point delayed by ΔT / 2 and a time point advanced by Δ / 2 from the time point (P / 2) at which the peak value should come, and the time between the two-dot chain lines corresponds to time ΔT. Note that ΔT / 2 is smaller than P / 4.

FIG. 17B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in FIG. 17 is omitted as appropriate.

As shown in FIG. 17A, when the collision plate 303 is inclined downward, the peak value is detected at a time earlier than P / 2, for example, P / 4. In this case, it is considered that the detected value due to the collision of the grain is input from the spout sensor 300 to the CPU 100a even between 0 and P / 4, and the detected value during this period should be the integration target. However, as described above, in the initial setting, the detected values between 0 to P / 4 and 3P / 4 to P are considered to correspond to steady deviations and are not subject to integration.

Furthermore, a detected value between 0 and P / 4 is regarded as a steady deviation, although it is a detected value due to a collision of grains. Therefore, a value that is not a steady-state deviation is also removed from the detection value (integration target) between P / 4 and 3P / 4. As a result, it is difficult to accurately calculate the grain amount.

Next, the grain amount calculation processing by the CPU 100a will be described. FIG. 18 is a flowchart showing the grain amount calculation processing by the CPU 100a. After executing steps S61 to S65, the CPU 100a executes a peak value specifying process described later (step S66), and executes steps S67 to S73.

Note that the processing of step S61 to step S65 and step S67 to step S73 is the same as the grain amount calculation processing (step S1 to step S13) in the first embodiment, and detailed description thereof will be omitted. Further, the CPU 100a executes the above-described correction value calculation process (see FIG. 10).

Next, the peak value specifying process by the CPU 100a will be described. FIG. 19 is a flowchart showing the peak value specifying process by the CPU 100a. The CPU 100a executes the peak value specifying process after executing the above-described process of step S65 (see step S66 in FIG. 18).

The CPU 100a takes in signals from the pickup sensor 51 and the spout sensor 300, and detects a point in time when a peak value between 0 and P is detected with reference to a timer (step S661). Next, the CPU 100a determines whether or not the magnitude of the difference between the target time (for example, P / 2) at which the peak value is to come and the detection time is equal to or smaller than ΔT / 2 (step S662).

When the difference between the target time point and the detection time point is ΔT / 2 or less (step S662: YES), the CPU 100a advances the process to step S67 (see FIG. 18, step S67). At this time, the peak value is present in a predetermined time zone (a time zone of ± ΔT / 2 with respect to P / 2), and it is considered that the detection time point of the peak value is not greatly deviated from the target time point.

When the difference between the target time point and the detection time point is not equal to or smaller than ΔT / 2 (step S662: NO), the CPU 100a outputs a lighting signal to the notification lamp 86 (step S663). At this time, the peak value does not exist in a predetermined time zone. For example, as shown in FIG. 14B, it is considered that the peak value detection time point is greatly deviated from the target time point because the collision plate 303 is inclined downward.

Next, the CPU 100a outputs a lighting signal to the notification lamp 86 (step S663). By turning on the notification lamp 86, the user can recognize that the detection time point of the peak value is greatly deviated from the target time point. Then, the CPU 100a changes the calculation target period (the period in which the grain collides with the spout sensor 300, in other words, between P / 4 and 3P / 4) (step S664). Specifically, the start time of the calculation target period is delayed or advanced by the magnitude of the difference between the detection time and the target time. In the case of the present embodiment, for example, when the difference is K, P / 4 ± K is set as the start time, and 3P / 4 ± K is set as the end time.

Next, the CPU 100a outputs a signal indicating that the calculation target period has been changed to the display unit 83 (step S665). For example, the display unit 83 displays that “the grain amount has been changed”. By this display, the user can easily recognize that the calculation target period has been changed. Then, the CPU 100a returns the process to step S67.

It should be noted that step S664 and step S665 may be omitted in the peak value specifying process, and the subsequent calculation of the grain amount may be stopped. In this case, a warning such as “Is the position of the spout sensor misaligned?” Or “The calculation of the grain amount is stopped” is displayed on the display unit 83, and the spout sensor 300 of the service person Repairs may be encouraged.

In the combine according to the third embodiment, since the grain is considered to be in contact with the spout sensor 300 before and after the peak value of the impact force is detected, the peak value is determined for a predetermined time. When deviating from the band (time zone of ± ΔT / 2 with respect to P / 2), the amount of grain stored in the grain tank 4 cannot be accurately calculated. Therefore, when the detection point of the peak value deviates from the predetermined time zone, the fact is notified to the user. As a result, the user can be prompted to repair or adjust the position of the spout sensor 300 by a service person.

In addition, when the detection time of the peak value deviates from the predetermined time zone, the calculation target period is changed, and the grain amount is calculated based on the impact force detected by the spout sensor 300 during the changed calculation target period. . Thereby, calculation of the amount of grains can be continued.

In addition, when the calculation target period is changed, the user is notified by turning on the notification lamp 86 or displaying on the display unit 83, and after the harvesting is completed, the serviceman repairs / positions the detection means. Can be encouraged.

In the third embodiment described above, the position of the spout sensor 300 deviates from the appropriate position as a factor that causes the detection time of the peak value by the spout sensor 300 to advance or delay from the time when the peak value should be detected. However, the present invention is not limited to this case. For example, when the blade 23b is deformed, it can be cited as the above factor.

FIG. 20 is an enlarged plan sectional view schematically showing the deformed blade 23b. The blade 23b may be deformed due to aging, and when foreign matter such as soil is taken in, excessive force may act on the blade 23b due to the foreign matter taken in and the blade 23b may be deformed.

For example, as shown in FIG. 20, when the blades 23b are curved in the direction opposite to the rotation direction, the timing at which the grains are put into the grain tank 4 is delayed as compared with the case where the blades 23b are not curved. In addition, when the slat 23b curves in the same direction as the rotation direction, the timing at which the grain is put into the grain tank 4 is earlier than when the slat 23b is not curved.

Also in this case, by executing the above-described peak value specifying process, it is possible to detect a delay or advance at the time of detecting the peak value and notify the user or correct the delay or advance. In this case, a warning “Are the blades deformed?” May be displayed on the display unit 83 to prompt the serviceman to repair the blades 23b.

Of the configurations according to the third embodiment, configurations similar to those of the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the first to third embodiments, it is determined whether or not to perform integration using the detection value detected by the spout sensor 300 for each rotation period (one period) of the blade plate 23b. The detection value of the period (for example, 2 or 3 periods) may be stored in the EEPROM 100d, and the above determination may be executed with a plurality of periods as a unit.

(Embodiment 4)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a combine according to a fourth embodiment.

The combine which concerns on Embodiment 4 uses the bucket type elevator 144 for conveyance of a grain instead of a screw conveyor. Other configurations are the same as those in the first to third embodiments. FIG. 21 is an internal side configuration diagram schematically showing the bucket elevator 144 and the grain tank 4 in an enlarged manner. In FIG. 21, the broken line arrow indicates the moving direction of the grain, and the round shape indicates the grain.

The bucket type elevator 144 is formed by the rear plate 500, the front plate 501, the left and right side plates 502, and the top plate 144a. The front plate 501 facing the top plate 144a is a non-guide surface.

Sprockets 503 and 504 having axial centers in the left and right directions are respectively provided at the upper and lower portions inside the bucket elevator 144, and an endless chain 505 is wound around the sprockets 503 and 504. A plurality of buckets 506, such as a substantially U-shape in a side view when viewed from the upper side, are attached to the chain 505 at appropriate intervals.

The driving force is transmitted to the sprocket 504 provided at the lower part of the bucket type elevator 144, and the chain 505 is driven with the rotation of the sprocket 504, and the sprocket 503 provided at the upper part of the bucket type elevator 144 is rotated. A bucket 506 is circulated up and down along a chain 505 between a grain supply port (not shown) provided at the lower part of the bucket elevator 144 and a grain outlet 507 provided at the upper part of the bucket elevator 144. The

The spout sensor 300 is disposed in the grain tank 4 between the top plate 144a and the grain outlet 507. The spout sensor 300 is separated from the top plate 144a.

In the grain tank 4, a leveling disc 150 is provided in the vicinity of the grain outlet 507 to flip the grain. The leveling disk 150 is supported by the grain tank 4 via a support member 154.

The support member 154 is provided with a rotatable rotary shaft 153 with the vertical direction as an axial direction. The leveling disk 150 has a disk portion 151 with the vertical direction as the rotation axis direction, and a plurality of blades 152, 152,... Standing on the upper surface of the disk portion 151 and arranged radially around the center of rotation. , 152. The rotation shaft 153 is connected to the center portion of the disk portion 151. A motor 155 is provided below the support member 154, and an output shaft of the motor 155 is connected to the rotation shaft 153.

The grain input from the bucket 506 reaches the leveling disc 150 through the grain outlet 507. The disk portion 151 is rotated by the drive of the motor 155, and the blades 152 bounce off the grains and deposit them in the grain tank 4 on average.

As shown in FIG. 21, most of the extruded grain moves along the top panel 144 a and continues in the grain tank 4 as indicated by the broken-line arrows and the circle near the top panel 144 a. It is thrown. In FIG. 21, as shown by broken arrows and a circle in the vicinity of the sprocket 503, the remaining grains are thrown into the grain tank 4 in a discrete manner. A discrete grain instantaneously collides with the spout sensor 300.

By separating the spout sensor 300 from the top plate 144a, a small amount of grains collide with the spout sensor 300, and the grains are deposited in the grain tank 4 on average.

Also, a pick-up sensor (not shown) is provided on a support plate (not shown) that supports the sprocket 503, and the pick-up sensor detects the period at which the bucket 506 rotates around the sprocket 503. Then, based on the detection values of the pickup sensor and the spout sensor 300, the calculation of the grain amount, the detection of the peak value, and the like are performed as in the third embodiment.

The spout sensor 300 may be provided in the grain tank 4. FIG. 22 is an internal side view schematically showing an enlarged view of the grain tank 4 having the bucket type elevator 144 and the spout sensor 300 therein.

As shown in FIG. 22, the spout sensor 300 is supported by a support portion (not shown) that hangs down from the top surface portion of the grain tank 4. As with the side surface 141 of the combine according to the third embodiment, a guide surface (not shown) for guiding the grain is provided around the disk portion 151. Therefore, the first area and the second area exist in the grain tank 4. The spout sensor 300 is disposed in the second region.

Also in this case, the calculation of the grain amount, the detection of the peak value, and the like are performed based on the detection values of the pickup sensor and the spout sensor 300 as in the third embodiment.

In the inventions according to Embodiments 3 and 4, the introduction of the grain into the grain tank 4 is performed by the blade 23b provided at the front end of the screw conveyor 23 and the blade 152 provided on the disk portion 151. Even when any of the rotary buckets 156 is used, it is possible to notify the user that the detection point of the peak value has deviated from the predetermined time zone.

Of the configurations according to the fourth embodiment, the detailed description of the same configurations as the first to third embodiments will be omitted.

Claims (10)

1. Threshing device for threshing the harvested cereal, a storage unit for storing the grain threshed by the threshing device, a transport unit for transporting the grain from the threshing device to the storage unit, and the transport unit In a combine provided with a detecting means for detecting the impact force caused by the conveyed grain and a calculating means for calculating the grain amount based on the impact force detected by the detecting means,
   The calculating means includes
   Determination means for determining whether or not the impact force detected by the detection means is greater than a preset threshold;
   A combiner comprising: a determining unit that determines whether or not the detected impact force is used for calculation by the calculating unit based on a determination result by the determining unit.
2. The conveying means is a screw conveyor;
   A blade plate is provided in the shaft portion at the end of the screw conveyor to feed the grain into the storage section,
   The combine according to claim 1, wherein the detecting means is arranged to face the blades.
3. The calculating means includes
   Having a summing means for summing up the impact force detected during a period when the grains thrown from the blades should collide with the detecting means;
   Based on the accumulated value, the amount of grain is calculated,
   The determination means determines whether or not the impact force is larger than the threshold during the period,
   The combine according to claim 2, wherein the determining means determines to use the impact force determined by the determining means to be larger than the threshold value for integration by the integrating means.
4. The calculating means includes
   Having a summing means for summing up the impact force detected during a period when the grains thrown from the blades should collide with the detecting means;
   Based on the accumulated value, the amount of grain is calculated,
   The determination means determines whether or not the impact force is larger than the threshold during the period,
   When the determination unit determines that the impact force detected at an arbitrary point in the period is greater than the threshold, the determination unit integrates the impact force detected within the period with the integration unit. The combine according to claim 2, wherein the combine is determined to be used.
5. A rotational speed detection means for detecting the rotational speed of the screw conveyor;
   Means for obtaining a rotation period of the screw conveyor based on a detection result of the rotation speed detection means;
   The combine according to claim 3 or 4, wherein a period in which the grain put in from the blades should collide with the detection means is included in one rotation cycle.
6. The said calculating means has a means to remove the stationary deviation contained in the integration result of the said integration means based on the impact force of the said detection means detected outside the said period of Claim 3-5 Combine according to any one of the above.
7. The transport means includes a rotary input unit that inputs grains into the storage unit,
   A rotation period detecting means for detecting a rotation period of the charging unit;
   A specifying means for specifying a point in time when the peak value of the impact force is detected by the detection means during one rotation period detected by the rotation period detection means;
   Informing means for notifying that the time point is outside the predetermined time zone when the peak value is detected by the specifying means is outside the predetermined time zone in one rotation cycle. The combine according to claim 1.
8. The calculation means is configured to calculate a grain amount based on a detection value detected by the detection means during a predetermined calculation target period in the one rotation cycle,
   The combine according to claim 7, wherein the calculation target period is changed when the point in time when the peak value is detected by the specifying means is outside a predetermined time zone.
9. The combine according to claim 8, further comprising: a change notification unit that notifies that the change of the calculation target period is being executed when the calculation unit changes the calculation target period.
10. The combine according to any one of claims 7 to 9, wherein the charging unit is a blade rotating around a rotation axis or a bucket rotating around a sprocket.

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