JP5947126B2 - Combine - Google Patents

Description

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

  When harvesting grains such as soybeans and corn, a combine that harvests and thresh cereal grains and collects 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 bucket conveyor. to recover.

  When measuring the amount of grain residing in the grain tank, a grain quantity detection sensor having a piezoelectric element is provided in the grain tank, and based on the pressure when the grain comes into contact with the grain quantity detection sensor (For example, refer to 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 bucket type combine which can remove the influence of a disturbance from the output of a grain amount detection means.

The combine according to the present invention is driven by a threshing device for threshing the harvested cereal, a storage unit for storing the grain threshed by the threshing device, a chain and a sprocket, and threshed by the threshing device. In a combine equipped with a bucket for feeding the stored grain into the storage unit, and a grain amount detection means for detecting the amount of grain fed by the bucket, passage detection means for detecting the passage of the bucket, and the passage The detection result detected by the grain amount detection means during the contact period of the grain to the grain amount detection means determined based on the detection result of the detection means is transferred to the grain amount detection means outside the period. and correcting means for correcting on the basis of the detection result Te, the chain accommodates the sprocket and the bucket, a guide surface for guiding the grains to be introduced from the bucket into the reservoir And a support plate that supports a rotating shaft attached to the sprocket and is movable in a direction intersecting the axial length direction of the rotating shaft, and the grain amount detecting means is provided in the casing. wherein are arranged in a position separated from the guide surface, and wherein the Oh isosamples provided the passage detection means to the support plate Te.

  In the present invention, the detection result of the grain amount detection means detected outside the period in which the grain thrown in from the bucket should contact is regarded as a steady deviation due to disturbance, and the detection result detected in the period is the period. Correction is performed based on the detection result detected outside to suppress the influence of disturbance.

Most of the grains thrown in from the bucket move continuously in the casing along the guide surface. When the grain amount detection means is close to the guide surface, the grain continuously contacts the grain amount detection means, and also contacts the grain amount detection means outside the period, so it is detected outside the period. The detected value cannot be regarded as a steady deviation.
In the present invention, since the grain amount detection means is arranged at a position separated from the guide surface, a small amount of grains abuts instantaneously on the period, and the detected value in the period and the detection outside the period The difference from the value becomes clear, and the steady deviation can be removed from the detected value in the period based on the detected value outside the period.

  In the present invention, when the position of the support plate that supports the sprocket is adjusted according to the elongation of the chain, the position of the passage detecting means is also adjusted in the same manner, and the timing of grain input by the bucket is adjusted accurately even after adjustment. Can be sought.

  In the present invention, the detection result of the grain amount detection means detected outside the period in which the grain put in from the bucket should contact is regarded as a steady deviation due to disturbance, and the detection result detected in the period is Since it correct | amends based on the detection result detected outside the said period, the influence of a disturbance can be suppressed.

It is a schematic side view of a combine. It is a schematic plan view of a combine. It is a schematic rear view of a combine. It is a partial expanded side view which briefly shows the conveyance route of the grain in a combine. It is an expanded sectional view which outlines the composition near the upper part of a whipping conveyor. FIG. 3 is an exploded perspective view schematically showing a configuration near a sprocket. It is a schematic sectional drawing explaining the structure of a fixing | fixed part and a pick-up sensor. It is explanatory drawing explaining the up-and-down position of a pickup sensor at the time of adjusting the up-and-down position of a support plate. 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 detection value of a grain amount detection sensor, and the detection value of a pickup sensor. It is an example of the graph which shows the relationship between the detection value of the grain amount detection sensor located on a top | upper surface part and an inclined surface part, and the detection 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.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating a combine according to an embodiment. 1 is a schematic side view of a combine, FIG. 2 is a schematic plan view of the combine, FIG. 3 is a schematic rear view of the combine, and FIG. 4 is a partially enlarged side view schematically showing a grain transport path in the combine. .

  As shown in FIGS. 1 to 4, the combine includes a crawler 1 that travels in a field, and a chassis 100 is provided on the crawler 1. A threshing unit 2 is provided on the chassis 100, and a reaping unit 4 is provided in front of the threshing unit 2 via a feeder chamber 3. A grain tank 5 is provided on the lateral side of the threshing unit 2, and an operation unit 6 is provided on the front side of the grain tank 5.

  A swing sorting device 9 is disposed below the threshing unit 2. Below the swing sorting device 9, a screw-type first conveyor 8 is provided with the axial direction set in the horizontal direction. A bucket type whipping conveyor 7 is erected at the end of the first conveyor 8. The cereal conveyor 7 is wound between a box-like casing 70 that is long in the vertical direction, two sprockets 14 and 15 that are pivotally supported in the casing 70 so as to be spaced apart in the vertical direction, and both sprockets 14 and 15. And a plurality of buckets 17 fixed to the conveyor chain 16. The cereal conveyor 7 is provided with a receiving part (not shown) having an arcuate cross section projecting downward at the lower part thereof. The upper part of the pre-lifted grain conveyor 7 is connected to the grain tank 5. The grains selected by the swing sorting device 9 are conveyed by the first conveyor 8 to the receiving portion of the whipped conveyor 7. The grains in the receiving part are picked up by the bucket 17 by driving of the sprockets 14 and 15 and the conveyor chain 16 and conveyed to the upper part of the cereal conveyor 7.

  In the upper part of the grain tank 5, a leveling disk 150 (see FIG. 5), which will be described later, is provided at a connection part with the cereal conveyor 7. The leveling disc 150 has a vertical direction as a rotation axis direction. The grain conveyed to the upper part of the cereal conveyor 7 is thrown toward the grain tank 5 by the bucket 17. The input grain is blown off by the rotating leveling disc 150 and uniformly dispersed in the grain tank 5.

  A lower basket (not shown) is provided in the lower part of the grain tank 5, and a screw-type carry-out conveyor 11 is provided in the lower basket. A lower part of a bucket type grain discharging device 13 is connected to the terminal end of the carry-out conveyor 11 via a transfer case 12. The grain discharging apparatus 13 discharges the grains stored in the grain tank 5 from the upper part of the grain discharging apparatus 13 to the outside.

  A discharge port 13a is provided in the upper part of the grain discharge device 13, and the discharge port 13a is an elongated cylindrical conveyor-type transfer device capable of transferring the grain to the rear or side of the machine body via a relay transfer device 69. 170. The grain discharged from the grain tank 5 by the grain discharging device 13 is transferred to an external tank or the like by the conveyor type conveying device 170.

FIG. 5 is an enlarged cross-sectional view schematically showing a configuration near the upper portion of the cereal conveyor 7.
The casing 70 of the whipping conveyor 7 includes a plurality of upper and lower side portions 71 that cover the periphery of the conveyor chain 16 and a ceiling portion 72 that is disposed on the upper side of the conveyor chain 16. The side surface portion 71 is arranged around the middle portion of the conveyor chain 16, and the one side surface portion 71 is adjacent to the grain tank 5. The ceiling part 72 covers the upper part of the side part 71 and protrudes to the grain tank 5 side. The protruding part of the ceiling part 72 is connected to the upper surface part of the grain tank 5.

  The ceiling part 72 is connected to the peripheral part of the top surface part 72a perpendicular to the vertical direction, the top surface part 72a, a plurality of inclined surface parts 72b inclined downward, and a plurality of parts suspended from the lower end part of the inclined surface part 72b. Connecting side surface portion 72c. The top surface portion 72 a is located above both the upper sprocket 14 and the grain tank 5. The lower end portions of the plurality of connection side surface portions 72 c are connected to the other side surface portion 71 located at a position separated from the grain tank 5 and the upper surface portion of the grain tank 5, respectively. An opening 5a is provided in the upper surface portion, and the opening 5a communicates with the inside of the ceiling portion 72.

  In the ceiling part 72, the grain amount detection sensor 73 which detects a grain amount is attached to the inclined surface part 72b located in the grain tank 5 side. The grain amount detection sensor 73 is fixed to the inclined surface portion 72b via a fixture 74 protruding from the inclined surface portion 72b, and is separated from the inclined surface portion 72b. The grain amount detection sensor 73 includes a strain gauge, a circuit board, and the like. The grain amount detection sensor 73 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. The separation distance between the grain amount detection sensor 73 and the inclined surface portion 72 b is a distance at which the grain or the grain group guided by the inclined surface portion 72 b does not come into contact with the grain amount detection sensor 73.

  In the grain tank 5, a leveling disk 150 for flipping the grain is provided in the vicinity of the connecting side surface portion. The leveling disk 150 is supported by the grain tank 5 via a support member 154. The leveling disk 150 includes a disk portion 151 whose vertical direction is the rotation axis direction, a plurality of blade portions 152 that are erected on the upper surface of the disk portion 151 and are arranged radially around the rotation center, and the disk portion 151. And a motor 153 disposed on the lower side of the disk portion 151.

  As shown in FIG. 5, when the bucket 17 turns around the sprocket 14 and moves around, the grain is put into the grain tank 5. Most of the input grains move continuously toward the top surface portion 72a by centrifugal force, and move along these surfaces using the top surface portion 72a and the inclined surface portion 72b as guide surfaces. These grains or grain groups move between the grain amount detection sensor 73 and the inclined surface portion 72b, and reach the leveling disk 150 without colliding with the grain amount detection sensor 73. On the other hand, a small amount of grain moves discretely at positions away from the top surface portion 72 a, collides with the grain quantity detection sensor 73, and reaches the leveling disk 150. Due to the rotation of the disk unit 151, the blade unit 152 blows off the grains, and the grains are stored in the grain tank 5 on the average.

FIG. 6 is an exploded perspective view schematically showing the configuration near the sprocket 14.
The connecting side surface portions 72c facing both surfaces of the sprocket 14 are provided with elliptical through holes 72d1 and 72d2 that are vertically long. The short diameter of one through hole 72d1 is longer than that of the other through hole 72d2, and is designed so that a pickup sensor described later is inserted. Female thread portions are provided on both sides of the through holes 72d1 and 72d2. Two support plates 161 and 162 that support a chain shaft 180 described later are opposed to the through holes 72d1 and 72d2, respectively. The support plates 161 and 162 are located on the opposite side of the sprocket 14 with the connecting side surface portion 72c therebetween. The support plates 161 and 162 have insertion holes 161b and 162b corresponding to the through holes 72d1 and 72d2. Long holes 161a, 161a, 162a, 162a that are long in the vertical direction are provided on both sides of the insertion holes 161b, 162b, respectively.

  A pick-up sensor (passage detecting means) 161c for detecting the passage of the bucket 17 is provided on the support plate 161 located on the side of one through hole 72d1. The pickup sensor 161c is a magnetic sensor having a Hall element or the like, and is located between the insertion hole 161b and the long hole 161a and can be inserted into the through hole 72d1. The pickup sensor 161c faces the ascending row in the conveyor chain 16. After adjusting the vertical positions of the two support plates 161 and 162, bolts 163 are inserted into the long holes 161a and 162a through the collar 164 and screwed to the female screw portion, so that the two support plates 161 and 162 are connected to the connecting side surface portion 72c. Fixed to.

  A chain shaft 180 into which the sprocket 14 is fitted is inserted from the insertion hole 161b of one support plate 161, and is further inserted into both the through holes 72d1 and 72d2 and the other insertion hole 162b. The chain shaft 180 is rotatably fitted in both the insertion holes 161b and 162b via the bearing 181. Inside the casing 70, the sprocket 14 is fitted in the middle portion of the chain shaft 180 via a collar 14a. The sprocket 15 is also fitted on a rotatable chain shaft (not shown). A conveyor chain 16 is hung on the sprockets 14, 15, and the conveyor chain 16 is driven by the rotation of the sprockets 14, 15, and the grains are input by the bucket 17.

FIG. 7 is a schematic cross-sectional view illustrating the configuration of the fixing portion 16c and the pickup sensor 161c.
The conveyor chain 16 includes a plurality of outer links 16a and inner links 16b, and the outer links 16a and the inner links 16b are connected. A bucket 17 is fixed to each inner link 16b, and a fixing portion 16c made of a magnetic material is provided. The bucket 17 is fixed to a predetermined fixing portion 16c with a substantially equal interval. There is also a fixing portion 16c where the bucket 17 is not fixed. A concave portion 16d is formed on the support plate 161 side of the fixed portion 16c. When the conveyor chain 16 is driven, the ascending row passes in front of the pickup sensor 161c. When the recess 16d passes in front of the pickup sensor 161c, a passage signal is output from the pickup sensor 161c and input to a control unit described later. The inner link 16b may also serve as the fixing portion 16c. In this case, a recess 16d is formed in the inner link 16b.

FIG. 8 is an explanatory diagram for explaining the vertical position of the pickup sensor 161c when the vertical position of the support plate 161 is adjusted.
By adjusting the vertical positions of the support plates 161 and 162, the tension of the conveyor chain 16 can be adjusted. For example, when the conveyor chain 16 is worn due to long-term use (so-called conveyor chain 16 is extended), the sprocket 14 can be moved upward to recover the tension of the conveyor chain 16. Specifically, both support plates 161 and 162 supporting the chain shaft 180 are moved upward to move the sprocket 14.

  As indicated by the arrows in FIG. 8, when the support plate 161 is raised upward, the pickup sensor 161 c fixed to the support plate 161 is also raised by the same distance as the support plate 161. The distance that the pickup sensor 161c is raised corresponds to the elongation of the conveyor chain 16.

  The timing at which the fixing portion 16c fixing the bucket 17 passes through the pickup sensor 161c is measured in advance, and the pickup sensor 161c outputs a detection result in accordance with the timing, and the control portion takes in the detection result. The control unit may capture the output signal of the pickup sensor 161c in accordance with the timing. Therefore, when only the support plate 161 moves and the pickup sensor 161c does not move, the output signal of the pickup sensor 161c cannot be taken in at the timing to be taken in, so the amount of grain put in by the bucket 17 is accurately calculated. I can't. As described above, by raising the same distance as the support plate 161, the control unit can capture the output signal of the pickup sensor 161c in accordance with the timing. The timing is determined in accordance with the rotational speed of the sprockets 14 and 15. For example, according to the slow speed of the sprockets 14 and 15, the length between the time points when the output signal of the pickup sensor 161c is taken becomes long and short. Further, the combine includes an engine (not shown), and the sprockets 14 and 15 are rotated by driving the engine. Therefore, the timing may be determined in accordance with the rotational speed of the output shaft of the engine.

  Based on the outputs from the grain amount detection sensor 73 and the pickup sensor 161c, a control unit that calculates the grain amount stored in the grain tank is mounted on the combine. FIG. 9 is a block diagram showing the configuration of the control unit 100, and FIG. 10 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 via an internal bus 100g. ing. The CPU 100a reads a control program stored in the ROM 100b into the RAM 100c, and executes a grain amount calculation 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. 10). 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 speed of the sprockets 14 and 15. The number of rotations indicates the number of rotations per unit time (for example, 1 minute).

  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 grain amount detection sensor 73 is included in the grain amount calculation target is set.

  On the power transmission path from the engine to the mowing unit 4 and the threshing unit 2, a mowing / threshing clutch 46 for cutting or connecting the power transmission path is provided. An engine speed sensor 40 for detecting the engine speed is provided near the engine output shaft. A dashboard panel (not shown) is provided in the operation unit 6, and a cutting switch 80 for cutting and threshing, a display unit 83 for displaying information, and the like are arranged on the dashboard panel.

  The control unit 100 outputs a disconnection / connection signal to the mowing / threshing clutch 46 via 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.

  Output signals of the cutting switch 80, the grain amount detection sensor 73, the pickup sensor 161c, and the engine speed sensor 40 are input to the control unit 100 via the input interface 100e. The cutting / threshing clutch 46 is disconnected / connected in response to ON / OFF of the cutting switch 80.

  CPU100a integrates the detection value which concerns on the output signal of the grain amount detection sensor 73, determines whether it includes in the integration | accumulation object compared with threshold value (alpha). Then, 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 161c. FIG. 11 is an example of a graph showing the relationship between the detection value of the grain amount detection sensor 73 and the detection value of the pickup sensor 161c. FIG. 11A is a graph showing the relationship between time and the detection value of the grain amount detection sensor 73. The detection value of the grain amount detection sensor 73 indicates the amount of distortion due to the collision of the grains, and is a moving average value at a predetermined sampling number. FIG. 11B is a graph showing the relationship between time and the detection value of the pickup sensor 161c. The detection value of the pickup sensor 161 c indicates the starting point of the grain input period by the bucket 17. In the following description, the subscript of the period P in FIG. 11 is omitted as appropriate.

  The detection value of the pickup sensor 161c is detected as a pulse wave, and corresponds to the period until the next bucket 17 passes after the passage of the bucket 17 having the same pulse wave interval, in other words, the passage period P of the bucket 17. To do. The CPU 100a takes in the detection value of the grain amount detection sensor 73 at a predetermined cycle (for example, 100 [ms]) corresponding to the cycle P, 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 161c, and associates the time stamp with the detection value input from the grain amount detection sensor 73 when the pulse wave is input. And stored in the EEPROM 100d.

  In FIG. 11, when the grains are put into the grain tank 5 by the bucket 17, the grains collide from the grain amount detection sensor 73 to the CPU 100 a during P / 4 to 3P / 4 (contact period). The detected value is input. The detected value input from 0 to P / 4 and 3P / 4 to P from the kernel amount detection sensor 73 to the CPU 100a is a detection value when the kernel does not collide with the kernel amount detection sensor 73. . The grain amount detection sensor 73 instantaneously collides between P / 4 to 3P / 4, and the grain is between 0 to P / 4 and 3P / 4 to P (non-contact period). Will not collide.

  In FIG. 11A, the threshold value α corresponds to a detection value detected by the grain amount detection sensor 73 due to disturbances such as the temperature characteristics of the grain amount detection sensor 73 and the inclination of the machine body. When the grain is not put into the grain tank 5 by the bucket 17, ideally, the detected value due to the collision of the grain from the grain amount detection sensor 73 to the CPU 100 a is between P / 4 and 3P / 4. Not entered. However, actually, a detection value (threshold value α) due to disturbance is input from the grain amount detection sensor 73 to the CPU 100a.

  CPU100a compares the detected value input from the grain amount detection sensor 73 between P / 4-3P / 4, and threshold value (alpha). When the detected value includes a value that exceeds 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. 11A). , P2 and P5 broken line hatched areas). The value to be integrated corresponds to the impulse by the collision of the grain with the grain amount detection sensor 73.

  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 target to be integrated (in FIG. 11A, the period P3). And P4 part).

  On the other hand, a value obtained by integrating the detection values of the grain amount detection sensor 73 between 0 and P / 4 and 3P / 4 and P (area of the hatched portion in FIG. 11A) corresponds to a steady deviation. The steady deviation is caused by the vibration of the engine, the vibration propagated to the grain amount detection sensor 73 during traveling in the uneven field, the characteristics of the grain amount detection sensor 73, and the like.

  The CPU 100a performs processing necessary for a value obtained by integrating the detection values of the grain amount detection sensor 73 between 0 to P / 4 and 3P / 4 to P in a predetermined cycle (for example, 1 [s]), and the EEPROM 100d To store in the correction variable X.

  The CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the grain amount detection sensor 73 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 5 is calculated | required.

  When the grain amount detection sensor 73 is arranged at a position separated from the top surface portion 72a and the inclined surface portion 72b, correction for removing the steady deviation can be executed. When the grain amount detection sensor 73 is disposed on the top surface portion 72a and the inclined surface portion 72b, correction for removing the steady deviation cannot be performed. The reason will be described below.

  FIG. 12 is an example of a graph showing the relationship between the detection value of the grain amount detection sensor 73 located on the top surface portion 72a and the inclined surface portion 72b and the detection value of the pickup sensor 161c. FIG. 12A is a graph showing the relationship between time and the detection value of the grain amount detection sensor 73. The detection value of the grain amount detection sensor 73 indicates the amount of distortion due to the collision of the grains, and is a moving average value at a predetermined sampling number. The solid line of FIG. 12A shows the detection value of the grain amount detection sensor 73 arranged on the top surface portion 72a and the inclined surface portion 72b. A two-dot chain line indicates a detection value of the grain amount detection sensor 73 arranged at a position separated from the top surface portion 72a and the inclined surface portion 72b. FIG. 12B is a graph showing the relationship between time and the detection value of the pickup sensor 161c. In the following description, the subscript of the period P in FIG.

  As shown in FIG. 5, a strip-shaped grain group that continuously spreads horizontally moves on the top surface portion 72 a and the inclined surface portion 72 b. Therefore, when the grain amount detection sensor 73 is arranged on the top surface portion 72a and the inclined surface portion 72b, the grain collides with the grain amount detection sensor 73 continuously during the period P. In other words, the grain collides between 0 to P / 4 and 3P / 4 to P, which should not have collided with the grain amount detection sensor 73.

  As shown in FIG. 12, in each period P1, P2, P5 in which the grain is put into the grain tank 5, the detected values between 0-P / 4 and 3P / 4-P are shown by two-dot chain lines. The detected value (detected value of the grain amount detection sensor 73 arranged at a position separated from the top surface portion 72a and the inclined surface portion 72b) is larger. This is because the grain collided between 0-P / 4 and 3P / 4-P, which should not have collided with the grain amount detection sensor 73.

  Moreover, in order to use the detected value between 0-P / 4 and 3P / 4-P for the correction which removes a stationary deviation, a grain is a grain between 0-P / 4 and 3P / 4-P. It is necessary to consider that the particle amount detection sensor 73 does not collide or does not collide. However, between 0-P / 4 and 3P / 4-P, the grain continuously collides with the grain amount detection sensor 73, and the detected value between 0-P / 4 and 3P / 4-P. Cannot be used for correction to remove the steady-state deviation.

  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 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 40 (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 40 (step S4).

  And CPU100a takes in a signal from pickup sensor 161c and grain amount detection sensor 73 (Step S5), and calculates an impulse between P / 4-3P / 4 (Step S6). At this time, the CPU 100a accesses the EEPROM 100d, refers to the time stamp, and calculates the detection value of the grain amount detection sensor 73 between P / 4 and 3P / 4. The detection value is sequentially input from the grain amount detection sensor 73 to the control unit 100 at a constant sampling period, and the CPU 100a inputs the time between P / 4 to 3P / 4 by referring to the time stamp. 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). The integrated value in step S <b> 11 corresponds to the amount of grain stored in the grain tank 5. 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. Note that the determination in step S7 may be performed after step S5. Further, the process of step S10 may be omitted and the correction value D may be integrated.

  Next, correction value calculation processing by the CPU 100a will be described. FIG. 14 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 161c and the grain amount detection sensor 73 (step S22), and impulses between 0 to P / 4 and 3P / 4 to P are obtained. 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 grain amount detection sensor 73 between 0-P / 4 and 3P / 4-P. The detection values are sequentially input from the grain amount detection sensor 73 to the control unit 100 at a constant sampling period, and the CPU 100a refers to 0 to P / 4 and 3P / 4 to P by referring to the time stamp. It is possible to recognize the detection value input during the period.

  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 100d is applied in accordance with an input from a switch (not shown) or multiplied by 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.

  In the above-described embodiment, periods 0 to P / 4 and 3P / 4 to P in which the grain should not contact the grain amount detection sensor 73 and periods P / 4 to 3P / in which the grain should contact 4 is merely an example, and is not limited thereto. The contact period and the non-contact period are determined according to the specifications of each combine.

  In the combine according to the embodiment, the detection result of the grain amount detection sensor 73 detected during a period when the grain input from the bucket 17 should not contact (non-contact period) is a steady deviation due to disturbance. Since the detection result detected in the period to be contacted (contact period) is corrected based on the detection result detected in the non-contact period, the influence of disturbance can be suppressed.

  In addition, since the grain amount detection sensor 73 is arranged at a position separated from the inclined surface portion 72b, a small amount of grain is momentarily brought into contact with the contact period, and the detected value in the contact period and the non-contact period The difference between the detected value and the detected value becomes clear, and the steady-state deviation can be removed from the detected value during the contact period based on the detected value during the non-contact period. Note that the grain amount detection sensor 73 is not limited to a position separated from the inclined surface portion 72b as long as it is a position where a small amount of grain instantaneously contacts. For example, the position separated from the top | upper surface part 72a may be sufficient.

  Further, when the positions of the support plates 161 and 162 that support the sprockets 14 and 15 are adjusted according to the elongation of the conveyor chain 16, the position of the pickup sensor 161c is also adjusted in the same manner, and the timing of the grain input by the bucket 17 is adjusted. It can be obtained accurately even after adjustment.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is intended to include all modifications within the scope of the claims and the scope equivalent to the scope of the claims.

2 Threshing part (threshing device)
5 grain tank (storage part)
14, 15 Sprocket 16 Conveyor chain (chain)
17 Bucket 100 Control unit (correction means)
70 Casing 72a Top surface portion (guide surface)
72b Inclined surface part (guide surface)
73 Grain amount detection sensor (grain amount detection means)
180 Chain shaft (rotary shaft)
161, 162 Support plate 161c Pickup sensor (passage detection means)

Claims (1)

A threshing device for threshing the harvested cereal, a storage portion for storing the threshed grain by the threshing device, and a storage portion for storing the grain threshed by the threshing device driven by a chain and a sprocket In a combine equipped with a bucket to be input to and a grain amount detection means for detecting the amount of grain input by the bucket,
Passage detection means for detecting passage of the bucket;
The detection result detected by the grain quantity detection means during the contact period of the grain to the grain quantity detection means determined based on the detection result of the passage detection means, and the grain quantity detection outside the period Correction means for correcting based on the detection result detected by the means ;
A casing having a guide surface for accommodating the chain, the sprocket and the bucket, and guiding the grains charged from the bucket to the storage unit;
A support plate that supports a rotating shaft attached to the sprocket and is movable in a direction intersecting the axial length direction of the rotating shaft;
With
The grain amount detection means is arranged at a position separated from the guide surface in the casing,
Combine characterized by Oh isosamples provided the passage detection means to the support plate.

Images