JP7263169B2 - combine - Google Patents

Description

The present invention relates to a combine harvester capable of determining the amount of grain harvested.

For the harvesting of grains such as soybeans and corns, a combine harvester is often used for harvesting grain stems from the base and recovering the grains. Inside such a combine, there are a threshing device for threshing the harvested grain stems, a storage unit for storing the threshed grains, and a storage unit for transporting the grains threshed by the threshing device to a predetermined position. A bucket or the like to be thrown into is provided.

In such a combine harvester, a guide surface is provided to guide the grain thrown out from the bucket to the storage unit, and a sensor is provided on the guide surface. It is known to determine the amount of grains to be put in (see Patent Document 1, for example). Such sensors are placed relatively far from the bucket, assuming that the grains are tossed far away from the bucket.

Japanese Patent No. 5947126

However, since the bucket has a concave shape with a deep bottom and many grains are stored inside, the grains do not finish coming out of the bucket immediately after the bucket starts the feeding operation, , the last grain is thrown out when the bucket is turned upside down. At the beginning of the bucket's starting operation, the grains are thrown far and reach the sensor. Enter the reservoir without colliding. The presence of grains that did not hit the sensor affected the accuracy of grain quantity measurement.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combine harvester capable of determining the amount of grains to be put into the storage section with higher accuracy.

The combine of the present invention includes a threshing device for threshing harvested grain stems, a storage unit for storing grains threshed by the threshing device, and a storage unit for storing grains threshed by the threshing device. A combine is provided with a bucket that is thrown in from the lateral direction toward an upper opening, and a sensor for determining the amount of grains thrown into the storage part from the bucket is provided above the storage part, wherein the sensor As a feature, a first grain amount sensor located far from the loading operation position of the bucket and a second grain amount sensor located near the loading operation position of the bucket are provided.

In the present invention, not only the first grain quantity sensor measures the grains thrown far from the bucket, but also the second grain quantity sensor measures the grains thrown downward from the bucket. It is possible to obtain with high accuracy the amount of grains put into the

The schematic side view of a combine. Schematic rear view of the combine. The figure seen from the right side of FIG. The partial schematic illustration side view of a combine. The figure seen from the other side of FIG. A vertical cross-sectional view of the upper part of a grain-lifting conveyor and a grain tank. The schematic plan view which looked at the grain-lifting conveyor and the grain tank from the top. Note that the guide is omitted from the drawing. The schematic perspective view of the inlet vicinity of a grain tank. Rear view of the upper part of the grain-lifting conveyor and the upper part of the grain tank. That is, the figure which looked at the upper part of FIG. 4 from the other side of FIG. The figure which shows the signal output from the 1st grain amount sensor in the upper stage, and the signal output from the pick-up sensor in the lower stage. The figure when the grain is colliding continuously with the 1st grain amount sensor. The figure which shows the signal output from the 1st grain amount sensor in the upper stage, and the signal output from the pick-up sensor in the lower stage. The figure of the time slot|zone including the time when the grain has not collided with the 1st grain amount sensor. The upper part is a diagram showing signals output from the first grain amount sensor and the second grain amount sensor in a superimposed manner. The middle row shows the signal output from the first grain amount sensor. The lower part shows the signal output from the second grain amount sensor. FIG. 2 is a block diagram centering on a control unit; The flowchart of the grain amount calculation process by a control part. 4 is a flowchart of correction value calculation processing by a control unit; The figure which shows the arrangement|positioning of the sensor of the example of a change. A vertical cross-sectional view of the upper part of a grain-lifting conveyor and a grain tank.

A combine of an embodiment will be described based on the drawings. In addition, the following embodiments are examples, and the scope of the invention is not limited to these.

First, the overall structure of the combine will be described with reference to FIGS. 1 to 3. FIG.

In the combine shown in FIGS. 1 to 3, a reaping section 10 for reaping grain stems is arranged forward in the traveling direction, and a feeder 11 for feeding grain stems rearward is arranged behind the reaping section 10 . Behind the feeder 11, a threshing device 12 for threshing the stems fed from the feeder 11 is arranged.

Under the threshing device 12, a sorting machine 13 for sorting and extracting grains from grains obtained by threshing and straw scraps is arranged. Further, as shown in FIG. 2, a screw-type transfer conveyor 14 is arranged below the sorter 13 for laterally moving the grains sorted by the sorter 13 . The harvesting unit 10, the feeder 11, the threshing device 12, the sorting machine 13, and the transfer conveyor 14 are driven by power from a combine engine (not shown). An engine speed sensor 63 (see FIG. 11) for measuring the speed of the engine is provided near the output shaft of the engine.

Further, as shown in FIG. 2, a grain-hoisting conveyor 20 extends upward from the terminal end of the transfer conveyor 14 . Furthermore, a grain tank 30 is arranged adjacent to the grain-lifting conveyor 20 as a storage unit for storing grains. The grain raising conveyor 20 is provided with a bucket 25 (see FIG. 4) that moves up and down. throw into.

As shown in FIG. 3, a screw-type unloading conveyor 15 for laterally moving grains is arranged under the grain tank 30 . A transfer case 19 is provided at the terminal end of the carry-out conveyor 15, and a grain discharging device 16 extends upward from the transfer case 19. As shown in FIG. The grain discharging device 16 has a structure in which a plurality of buckets connected by a chain conveys upward the grains that have reached the end of the unloading conveyor 15 .

An elongated tubular conveyer-type conveying device 18 is connected to the upper end of the grain discharging device 16 via an intermediary conveying device 17 . The grains stored in the grain tank 30 are conveyed by the unloading conveyor 15, the grain discharging device 16 and the intermediary conveying device 17, and discharged from the conveyor type conveying device 18 to a tank or the like outside the combine.

As shown in FIG. 1, behind the reaping unit 10, a driver's cab 60 is provided. A dashboard panel (not shown) is provided in the driver's cab 60 . The dashboard panel is provided with a reaping switch 61 (see FIG. 11) for starting and ending reaping and threshing, a display unit 62 (see FIG. 11) for displaying information to the driver, and the like. ing. The display unit 62 also serves as an operation panel for selecting crops to be harvested.

Next, the structure from the grain lifting conveyor 20 to the grain tank 30 will be described with reference to FIGS. 4 to 6. FIG.

As shown in FIG. 4 , the grain-raising conveyor 20 has a vertically long grain-raising tube 21 and sprockets 22 and 23 arranged in the vicinity of the lower end and the upper end of the grain-raising tube 21 . The upper end of the grain raising tube 21 is open, and the upper sprocket 23 is arranged above the opening 43 . Furthermore, as part of the grain-hoisting conveyor 20, an endless chain 24 is wound around the upper and lower sprockets 22 and 23. As shown in FIG.

The rotating shaft of the lower sprocket 22 is connected to the rotating shaft of the screw type transfer conveyor 14 . Therefore, the lower sprocket 22 rotates in synchronization with the rotation of the transfer conveyor 14 . As the lower sprocket 22 rotates, the upper sprocket 23 follows and the chain 24 rotates between the upper and lower sprockets 22 , 23 .

A plurality of (for example, 40) buckets 25 are provided on the chain 24 at regular intervals without any gaps. However, two buckets 25 are removed in succession at one point during one round of the chain 24 . As a result, a no-bucket section 29 in which the bucket 25 does not exist is formed at one position in one round of the chain 24 . The distance of the no-bucket section 29 (the distance indicated by L in FIG. 4) is the distance of two buckets 25 . The bucket 25 is of deep concave shape with an opening 32 to accommodate the grain inside.

A bucket 25 connected to the chain 24 goes around as the chain 24 rotates. The opening 32 of the bucket 25 faces the winding direction of the chain 24 . As described above, the transfer conveyor 14 is driven by the power from the engine, and the lower sprocket 22 rotates in synchronism with the rotation of the transfer conveyor 14. Therefore, the circulating speed of the chain 24 and the bucket 25 is determined by the rotation of the engine. number will be affected.

Below the sprocket 22 on the lower side, there is provided a receiving portion 26 to which the grains conveyed by the transfer conveyor 14 reach. This receiver 26 is also where the grain is scooped up by the bucket 25 . On the other hand, the location above the upper sprocket 23 is where the ascending bucket 25 folds back for descent.

In the grain-lifting conveyor 20 having such a structure, the bucket 25 scoops up the grain at the receiving portion 26 and conveys the grain while rising. Then, the bucket 25 throws out the grains toward the grain tank 30 when it folds back from the upward direction to the downward direction on the upper sprocket 23 . The position at which the bucket 25 throws out the grains is referred to as a throwing operation position 27 . The range of the throwing operation position 27 is from the position where the bucket 25 starts throwing grain (for example, the position when the bucket 25 comes to the top of the sprocket 23) to the position where the bucket 25 finishes throwing grain (for example, the bucket 25 is directed toward the top of the boundary wall 45 that separates the grain-lifting conveyor 20 and the grain tank 30). The bucket 25, which has been emptied by throwing out the grains, descends and picks up the grains again at the receiving portion 26.例文帳に追加Bucket 25 repeats this operation.

In addition, when the no-bucket section 29 in which the bucket 25 does not exist passes through the input operation position 27, of course, input of grains to the grain tank 30 is not performed. The reason why the no-bucket section 29 is provided is to deliberately create a time during which the grains are not thrown by the bucket 25 even though the chain 24 is circling, and to calculate a zero-point correction value to be described later. be.

A shaft 70, which is the rotating shaft of the upper sprocket 23, extends to the outside of the side wall 42 as shown in FIG. A first pulley 71 is provided at its extension, and a detection sprocket 73 is provided at the end of the shaft 70 . When the upper sprocket 23 rotates, the first pulley 71 and the detection sprocket 73 also rotate about the shaft 70 as a rotation axis.

As shown in FIG. 7, a plurality of peaks 74 and a plurality of valleys are formed on the outer peripheral portion of the detection sprocket 73 . A pickup sensor 28 is provided near the outer periphery of the detection sprocket 73 . With this configuration, when the sprocket 23 rotates, the detection sprocket 73 also rotates, and the crest 74 of the detection sprocket 73 passes in front of the pickup sensor 28 .

The pickup sensor 28 detects the peak 74 when the peak 74 of the detection sprocket 73 passes in front of it. Then, the pickup sensor 28 outputs a pulse signal each time the peak 74 is detected. Three peaks 74 are provided with respect to the rotation angle of the sprocket 23 when one bucket 25 passes through the closing operation position 27 . That is, the ridges 74 are provided so that the pickup sensor 28 outputs the pulse signal three times while the bucket 25 throws out the grains once.

Note that the detection sprocket 73 shown in FIG. 7 has nine peaks 74 . In this case, three buckets 25 pass through the closing operation position 27 while the detection sprocket 73 makes one turn.

As shown in FIG. 4, a grain tank 30 is provided adjacent to the grain unloading conveyor 20. As shown in FIG. A wall separating the grain tank 30 from the grain tank 30 by integrating the side wall of the grain tank 30 side of the grain tank 21 of the grain conveyor 20 and the side wall of the grain tank 30 on the side of the grain tank 30. It forms a boundary wall 45 which is a part.

An opening that opens upward is formed in the ceiling of the grain tank 30 . This opening is the grain entrance to the grain tank 30 . Hereinafter, this opening is referred to as "insertion port 35". The loading port 35 is obliquely below the loading operation position 27 of the bucket 25 . A leveling disc 31 is provided just below the inlet 35 of the grain tank 30 . The leveling disk 31 has a plurality of blades 33 whose rotational axis direction is the vertical direction, and a drive case 34 for rotating the blades 33 .

Two bevel gears (not shown) meshing with each other are housed in the drive case 34 . The rotating shaft of one bevel gear is connected to the rotating shaft 75 of the blade 33 . Also, the rotating shaft 76 of the other bevel gear extends to the outside of the side wall 42 as shown in FIG. A second pulley 77 is provided at the extension of the rotating shaft 76 .

A third pulley 78 is further provided outside the side wall 42 as shown in FIG. The rotation axes of the first pulley 71, the second pulley 77 and the third pulley 78 are parallel. One belt 72 is wound around these pulleys 71 , 77 and 78 .

Due to this configuration, when the upper sprocket 23 and the first pulley 71 rotate, the belt 72 rotates and the second pulley 77 and the third pulley 78 also rotate. When the second pulley 77 and its rotating shaft 76 rotate, the rotating shaft 75 and the blades 33 rotate via the bevel gear inside the drive case 34 .

The grains put into the grain tank 30 are dispersed in the lateral direction (for example, the direction perpendicular to the plane of FIG. evenly distributed.

A push switch 40 (see FIG. 11) is provided inside the grain tank 30 at a position slightly below the full height. When the inside of the grain tank 30 is nearly filled with grains, the grains push the push switch 40 .

A ceiling member 36 covers the space from above the opening 43 of the grain raising cylinder 21 of the grain raising conveyor 20 to above the inlet 35 of the grain tank 30 . The ceiling member 36 is a member that has a space inside and is open downward, and is composed of a horizontal ceiling portion 41 and four vertical side walls 42 . The upper sprocket 23 of the grain raising conveyor 20 is arranged in the inner space of the ceiling member 36 . The closing operation position 27 also exists within the space inside the ceiling member 36 .

In the space inside the ceiling member 36 , a single curved plate-shaped guide 37 is provided from above the charging position 27 to above the charging port 35 of the grain tank 30 . The lower surface of this guide 37 is a guide surface 38 that guides the grain thrown out at the throwing operation position 27 to the throwing port 35 of the grain tank 30, and is a single curved surface. The guide surface 38 of the guide 37 is highest above the input operation position 27, and gradually becomes lower than the input operation position 27 toward the front of the input operation direction (rightward in FIG. 4).

As shown in FIGS. 4 to 6, above the input port 35 of the grain tank 30, a first grain amount sensor 50 and a A second grain quantity sensor 54 is provided. The first grain amount sensor 50 and the second grain amount sensor 54 are plate-shaped sensors, and have a planar detection surface on one side thereof.

The first grain amount sensor 50 and the second grain amount sensor 54 are sensors that measure the magnitude of impact (hereinafter referred to as "impact value") when the grain collides with their detection surfaces. As the first grain amount sensor 50 and the second grain amount sensor 54, various sensors that can measure the impact value when the grain collides with the detection surface can be used. Gauges or piezoelectric elements are used. The measured impact value can be converted to the amount (eg, weight) of the grain striking the detection surface.

The first grain amount sensor 50 is provided at a location far from the input operation position 27 . Specifically, the first grain amount sensor 50 is provided at the front end of the guide surface 38 of the guide 37 in the direction in which the grains are thrown. Therefore, the first grain amount sensor 50 is fixed to the side wall 42 of the ceiling member 36 via the fixture 51 . The input port 35 of the grain tank 30 exists below the first grain quantity sensor 50 .

The detection surface of the first grain amount sensor 50 faces the input operation position 27 . Specifically, the detection surface of the first grain amount sensor 50 is parallel to the vertical direction (that is, vertical), and is perpendicular to the grain input direction in a plan view (that is, viewed from above). are doing. As a result, the grain thrown out from the throwing operation position 27 collides with the detection surface of the first grain amount sensor 50 from a direction nearly perpendicular to it, and then falls toward the grain tank 30 below.

Also, the second grain amount sensor 54 is provided at a location closer to the input operation position 27 than the first grain amount sensor 50 is. Specifically, an inclined portion 46 extending obliquely downward toward the grain tank 30 side from the uppermost portion of the boundary wall 45 that separates the side of the grain raising conveyor 20 (throwing operation position 27 side) and the grain tank 30 side. is formed. A second grain quantity sensor 54 is fixed on the inclined portion 46 via a fixture 55 . As a result, the second grain quantity sensor 54 protrudes from the top of the boundary wall 45 toward the grain tank 30 .

The detection surface of the second grain quantity sensor 54 faces upward, but is inclined with respect to the horizontal direction. Specifically, the detection surface of the second grain amount sensor 54 is lowered on the side of the projection toward the grain tank 30 side. The inclination angle is, for example, 20° or more and 30° or less with respect to the horizontal.

When the chain 24 rotates, the bucket 25 reaching the throwing operation position 27 throws out the grain in the lateral direction, which is the direction of the throwing port 35 of the grain tank 30 . It should be noted that the “horizontal direction” includes an obliquely upward direction and an obliquely downward direction. Most of the grains thrown out from the bucket 25 try to fly away according to the centrifugal force, are guided along the guide surface 38 of the guide 37, and collide with the first grain amount sensor 50 at the end of the guide 37 ( (see arrow A in FIGS. 4-6). Grains that collide with the first grain amount sensor 50 fall into the grain tank 30 . Since the first grain quantity sensor 50 is an extension of the guide 37 and plays the role of guiding the grain into the grain tank 30 in this way, it can be said that it also serves as a part of the guide. .

However, the inside of the bucket 25 does not become empty immediately after the bucket 25 starts the charging operation, and while the bucket 25 orbits around the sprocket 23 at the charging operation position 27, grains continue to come out of the bucket 25 . The grains remaining in the bucket 25 until the end are thrown downward when the bucket 25 reaches the vicinity of the terminal end of the throwing operation position 27 and assumes an upside-down posture (see FIGS. 4 and 6). See arrow B). The grain thrown downward collides with the second grain quantity sensor 54 projecting from the boundary wall 45 toward the grain tank 30 . The grain that collides with the second grain amount sensor 54 slides on the inclined second grain amount sensor 54 or bounces on the second grain amount sensor 54 and falls into the grain tank 30. do.

Some of the grains thrown downward from the bucket 25 may drop closer to the throwing operation position 27 than the second grain quantity sensor 54 . Such grains fall into the grain hoisting tube 21 of the grain hoisting conveyor 20 and are skimmed by the bucket 25 again.

A control unit 64 is provided in the combine. 8 to 10 show waveforms of signals input to the control section 64. FIG. 8 and 9, the waveform of the signal output from the first grain amount sensor 50 and input to the control unit 64 is shown in the upper row, and the waveform of the pulse signal output from the pickup sensor 28 and input to the control unit 64 is shown in the lower row. shown in The upper waveform and the lower waveform correspond in time. As illustrated, the waveform of the signal from the first grain amount sensor 50 has one peak for three pulse signals.

FIG. 8 shows waveforms of signals output from the first grain amount sensor 50 and input to the control unit 64 when the grain repeatedly collides with the first grain amount sensor 50 . Five mountain-shaped portions in this waveform are waveforms when grains collide with the first grain amount sensor 50 .

Looking at FIG. 8, it can be seen that a predetermined numerical value is always output from the first grain amount sensor 50, including the moment when the grain should hardly collide with the first grain amount sensor 50. . This predetermined numerical value is output from the first grain amount sensor 50 due to the temperature of the first grain amount sensor 50, the vibration of the combine, the inclination of the combine, and the like (these are collectively referred to as "disturbances"). Numeric value. This predetermined numerical value has no relationship with the amount of grains that have collided with the first grain amount sensor 50, so it is a numerical value that needs to be removed when obtaining the grain amount based on the measurement value of the first grain amount sensor 50. is. Therefore, in the calculation of the grain amount, which will be described later, this predetermined numerical value is treated as the “zero point correction value” of the first grain amount sensor 50 .

In FIG. 10, the signals output from the first grain amount sensor 50 and the second grain amount sensor 54 are superimposed on the upper part, and the signal output from the first grain amount sensor 50 is shown in the middle part. , the signal output from the second grain amount sensor 54 is shown in the lower part. Waveforms from the upper stage to the lower stage correspond in time. As shown in the upper and lower parts of FIG. 10 , the second grain amount sensor 54, like the first grain amount sensor 50, is at the moment when the second grain amount sensor 54 should hardly collide with the grain. It can be seen that a predetermined numerical value is always output, including This predetermined numerical value is treated as the “zero point correction value” of the second grain amount sensor 54 in the calculation of the grain amount, which will be described later.

By the way, since the waveform of FIG. 8 is a waveform when the grain repeatedly collides with the first grain amount sensor 50, the peak-shaped waveform is continuous. Therefore, it is difficult to recognize the waveform when the grain does not collide with the first grain amount sensor 50 (that is, the waveform caused only by the disturbance).

On the other hand, FIG. 9 shows the waveform of the signal output from the first grain amount sensor 50 and input to the control section 64 when the no-bucket section 29 passes through the loading operation position 27 . In this waveform, the relatively flat part after the first mountain-shaped waveform is the waveform when the no-bucket section 29 passes through the loading operation position 27, and the grains are detected by the first grain amount sensor 50. This is the waveform when there is no collision with This waveform when the grain does not collide with the first grain amount sensor 50 is the waveform caused by the disturbance. As will be described later, the zero point correction value of the first grain amount sensor 50 is obtained using this relatively flat waveform portion.

As shown in FIG. 10, the waveform of the signal output from the second grain amount sensor 54 also has a relatively flat waveform in the same time zone as the waveform of the signal output from the first grain amount sensor 50. part appears. The zero point correction value of the second grain amount sensor 54 is also obtained using such a relatively flat waveform portion.

8 and 9 also show the waveforms of the pulse signals output from the pickup sensor 28 and input to the controller 64, as described above. When the chain 24 goes around, the upper sprocket 23 also rotates. When the sprocket 23 rotates, the pickup sensor 28 detects the peaks 74 of the detection sprocket 73 rotating together with the sprocket 23, and outputs periodic pulse signals as shown in FIGS. . This pulse signal is synchronized with the signals output from the first grain amount sensor 50 and the second grain amount sensor 54 and acquired by the control section 64 provided in the combine.

The control unit 64 calculates the amount of grains put into the grain tank 30 based on the values measured by the first grain amount sensor 50 and the second grain amount sensor 54 . The control unit 64 has a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an EEPROM (Electrically Erasable and Programmable Read Only Memory) interconnected by an internal bus. The CPU loads the program stored in the ROM into the RAM and calculates the amount of grain according to the program.

The EEPROM stores data necessary for calculating the amount of grain fed into the grain tank 30 . For example, since the engine speed corresponds to the revolution speed of the bucket 25 as described above, the engine speed affects how the grains thrown out of the bucket 25 fly. It affects the manner of collision with the grain amount sensor 54 , and thus the measurement values of the first grain amount sensor 50 and the second grain amount sensor 54 . Therefore, a table showing the relationship between the engine speed and the coefficient α is stored in the EEPROM in order to include the influence of the engine speed in the calculation of the grain amount, which will be described later.

In addition, the relationship between the values measured by the first grain amount sensor 50 and the second grain amount sensor 54 and the amount of grain actually put into the grain tank 30 is affected by the type of crops to be harvested. do. Therefore, a variable β used for calculating the grain amount is determined for each crop, and the variable β is stored in the EEPROM. The variable β is determined individually for multiple types of crops.

Also, the control unit 64 has an input interface and an output interface. As shown in FIG. 11, the control unit 64 includes a first grain amount sensor 50, a second grain amount sensor 54, an engine speed sensor 63, a reaping switch 61, a pickup sensor 28, a push switch 40, and a display unit. 62 are connected. Output signals from the first grain amount sensor 50, the second grain amount sensor 54, the engine speed sensor 63, the reaping switch 61, the pickup sensor 28, and the push switch 40 are input to the control unit 64 via the input interface. be done. Also, the control unit 64 outputs an output signal to the display unit 62 or the like via the output interface.

Next, an example of calculation by the control unit 64 of the amount of grain put into the grain tank 30 will be described with reference to FIG. 12 . Note that the order of calculation shown in FIG. 12 can be changed as appropriate within a range that does not cause any problems.

First, the control unit 64 confirms whether the reaping switch 61 is on or off (S1), and if it is on (Yes in S1), the first grain amount sensor 50, the second grain amount sensor 54, It starts taking in signals from the number sensor 63 and the pickup sensor 28 (S2).

Here, the control unit 64 associates the signal from the first grain amount sensor 50 with the pulse signal from the pickup sensor 28, sets one pulse signal to the next pulse signal as one period, and the first grain Data for one cycle of the signal from the quantity sensor 50 is stored as one set. Similarly, the control unit 64 associates the signal from the second grain amount sensor 54 with the pulse signal from the pickup sensor 28, and makes one cycle of data of the signal from the second grain amount sensor 54 into one set. memorize. For reference, the range of one period is shown in FIGS. 8 and 9. FIG. After that, the control unit 64 calculates the amount of grains while continuously acquiring and storing signals. Hereinafter, the data of the signal from the first grain amount sensor 50 will be referred to as "first impact value data", and the data of the signal from the second grain amount sensor 54 will be referred to as "second impact value data".

Next, the control unit 64 reads the first shock value data for three cycles and the second shock value data for the same three cycles (S3). It is determined whether or not the shock value data is the data when the grain is thrown out (also called "thrown") by the bucket 25 (S4).

As a specific example of the determination method, the control unit 64 compares the first shock value data with a zero point correction value obtained by a method described later, and determines the zero point included in the first shock value data for three cycles. Count the number of data values greater than or equal to the correction value. Similarly, the control unit 64 compares the second shock value data with a zero-point correction value obtained by a method described later, and determines that the data equal to or greater than the zero-point correction value included in the second shock value data for three cycles Count the number of values. When the total number of data values equal to or greater than the zero point correction value contained in the first shock value data and the second shock value data is equal to or greater than a predetermined number, the first shock value data and the second shock value data for three cycles It is determined that the impact value data is the data when the grain was thrown out (Yes in S4).

On the other hand, if the total number of data values equal to or greater than the zero point correction value included in the first shock value data and the second shock value data for the three cycles is less than the predetermined number, the control unit 64 It is determined that the first impact value data and the second impact value data for the minute are data when the grain was not thrown out (No in S4). In this case, the control unit 64 regards the amount of grains put into the grain tank 30 in the three cycles as zero. Although the above is a specific example of the determination method, the control unit 64 may determine by other methods.

Next, the control unit 64 integrates the values of the first impact value data and the second impact value data for three cycles when the grain is thrown out (S5). That is, the control unit 64 obtains the area of one mountain-shaped waveform among the waveforms shown in FIG. 8 for each of the first shock value data and the second shock value data. This integrated value includes an integrated value of numerical values caused by disturbances in the first impact value data and the second impact value data.

Therefore, next, the control unit 64 performs a calculation to remove the integrated value of the numerical value caused by the disturbance from the integrated value obtained in S5. Here, the control unit 64 uses a zero point correction value obtained by a method described later as the numerical value resulting from the disturbance. Specifically, the control unit 64 performs the following calculations to calculate the "collision value per throw" from each of the first impact value data and the second impact value data (S6).
(Collision value per throw (value obtained from first impact value data))
= (Integral value for 3 cycles of the first impact value data)
- (Zero point correction value of the first grain amount sensor) x (Length of 3 cycles)
(Collision value per throw (value obtained from the second impact value data))
= (Integrated value for 3 cycles of the second impact value data)
- (Zero point correction value of the second grain amount sensor) x (Length of 3 cycles)
That is, taking the first mountain-shaped waveform (waveform of the first three cycles) in FIG. 8 as an example, the area of the shaded portion is subtracted from the area of the mountain-shaped waveform.

Next, the control unit 64 converts the "collision value per throw (value obtained from the first impact value data)" into the amount of grains that have collided with the first grain amount sensor 50, and converts "per throw (value obtained from the second impact value data)" is converted into the amount of grains that have collided with the second grain amount sensor 54 (S7).

Specifically, the control unit 64 puts the "collision value per throw (value obtained from the first impact value data)", the coefficient α and the variable β into a predetermined calculation formula, and calculates the "collision amount per throw ( Quantity obtained from the first shock value data)” is calculated. As a calculation formula here, a calculation formula derived experimentally or theoretically is used. Also, the coefficient α used in the calculation is determined based on the engine speed measured by the engine speed sensor 63 and the table stored in the EEPROM. By this calculation, the amount of grains that collided with the first grain amount sensor 50 during three cycles (in other words, by one injection by the bucket 25) is obtained.

In a similar manner, the control unit 64 puts the "collision value per throw (value obtained from the second impact value data)", the coefficient α and the variable β into a predetermined calculation formula, and the "collision amount per throw ( Quantity obtained from the second impact value data)” is obtained. As a result, the amount of grains that have collided with the second grain amount sensor 54 during three cycles (in other words, by one injection by the bucket 25) is obtained.

Next, the control unit 64 adds the "collision amount per throw (amount obtained from the first impact value data)" and the "collision amount per throw (amount obtained from the second impact value data)" to obtain " The input amount per one throw" is obtained (S8). As a result, the amount of grain collided with the first grain amount sensor 50 and the second grain amount sensor 54 and was put into the grain tank 30 during three cycles (in other words, by one injection by the bucket 25). is sought.

The control unit 64 adds the thus obtained "throwing amount per throw" to the integrated value of the "throwing amount per throw" up to that point (S9).

The control unit 64 repeats the calculations of S3 to S8 until the reaping switch 61 is turned off (No in S10), and successively accumulates the obtained "input amount per one throw" (S9). The control unit 64 may display the integrated value on the display unit 62 at any time.

When the reaping switch 61 is turned off (Yes in S10), the control unit 64 stops receiving signals from the first grain amount sensor 50, the second grain amount sensor 54, the engine speed sensor 63, and the pickup sensor 28. Terminate (S11).

If the push-type switch 40 in the grain tank 30 is pressed during harvesting and threshing, the control unit 64 displays that fact on the display unit 62 or issues a warning with a buzzer or lamp. Further, when the integrated value obtained by the above calculation becomes equal to or greater than a predetermined value, the control unit 64 may display that fact on the display unit 62 or issue a warning with a buzzer or a lamp.

Next, a method of calculating the zero point correction value by the control section 64 will be described.

The control unit 64 controls the first grain amount sensor 50 and the second grain amount sensor 54 when the no-bucket section 29 passes the feeding operation position 27 and grains are not fed into the grain tank 30 . Let the average value of the measured values be the respective zero point correction values. For this reason, the control unit 64 selects from the first shock value data and the second shock value data for 1.5 turns of the chain 24 that the no-bucket section 29 passes the throwing operation position 27 and the grains are thrown. Find out the data when it was not done. In order to find out such data, the control unit 64 determines that the time zone in which the statistical variation in the first shock value data and the second shock value data is equal to or less than the threshold value is the time when grains are fed into the grain tank 30. It is determined that it corresponds to the time period that was not read.

A specific example of a method for calculating such a zero point correction value will be described with reference to FIG.

First, the control unit 64 extracts the maximum and minimum values from the first impact value data for the first cycle of 1.5 turns of the chain 24, and extracts the maximum and minimum values, which are a kind of statistical variation. (S1). Similarly, the control section 64 extracts the maximum and minimum values from the second shock value data of the first cycle, and calculates the difference between the maximum and minimum values (S1). Then, when both of the obtained two “differences between the maximum value and the minimum value” are equal to or less than the predetermined threshold value (Yes in S2), the control unit 64 calculates the average value of the first impact value data for one cycle, An average value of the second impact value data of the same cycle is calculated (S3).

If the two "differences between the maximum value and the minimum value" are equal to or less than the predetermined threshold value, it means that neither the first shock value data nor the second shock value data has a mountain-shaped waveform in that cycle. This means that the grain did not collide with either the first grain amount sensor 50 or the second grain amount sensor 54 in that period.

On the other hand, if either one of the two obtained "differences between the maximum and minimum values" exceeds the predetermined threshold (No in S2), the difference between the maximum and minimum values of the data in the next cycle is calculated (S1).

The control unit 64 repeats the above calculation for three cycles or more. When the "difference between the maximum value and the minimum value" of the first shock value data is equal to or less than the threshold and the "difference between the maximum value and the minimum value" of the second shock value data is equal to or less than the threshold for three consecutive cycles. (Yes in S4), the control unit 64 calculates the average values of the first impact value data in the first and second cycles among the three cycles as candidates for the zero point correction value of the first grain quantity sensor 50. It is stored as a value (S5). At the same time, the control unit 64 stores the respective average values of the second shock value data in the first cycle and the second cycle out of the same three cycles as candidate values for the zero point correction value of the second grain quantity sensor 54. (S5).

On the other hand, only one cycle or If there are only two consecutive cycles (No in S4), the difference between the maximum and minimum values of the next cycle is calculated (S1).

Then, the control unit 64 repeats the above calculations until the data for 1.5 rounds of the chain 24 are calculated (S6).

Incidentally, if the length of one round of the chain 24 is the length of 40 buckets 25, the length of 1.5 rounds of the chain 24 is the length of 60 buckets 25, which is 180 cycles. minutes long.

Note that the "difference between the maximum value and the minimum value" of the first shock value data is equal to or less than the threshold and the "difference between the maximum value and the minimum value" of the second shock value data is equal to or less than the threshold for three consecutive cycles. means that the three cycles are three cycles when the portion corresponding to one bucket 25 in the no-bucket section 29 passes through the closing operation position 27 .

When the control unit 64 finishes calculating the data for 1.5 turns of the chain 24 (Yes in S6), the control unit 64 calculates and stores the candidate values for the zero point correction value for the data for the 1.5 turns. The minimum value is selected from (S7). Then, the control unit 64 sets the minimum value as a new zero point correction value to replace the previous zero point correction value (S8).

The zero point correction value updated in this manner is used for calculating the amount of grain for the next 1.5 rounds of the chain 24 . That is, the control unit 64 updates the zero-point correction value substantially at the same time when the chain 24 makes 1.5 turns, and uses the updated zero-point correction value to adjust the grain during the next 1.5 turns. Calculate the amount of grain to be charged into the tank 30;

Note that for a predetermined time period immediately after the chain 24 starts rotating, an appropriately set value is used as the zero point correction value.

Next, the effects of this embodiment will be described.

In this embodiment, the bucket 25 throws grains from the lateral direction (both the diagonally upward direction and the lateral direction are included in the horizontal direction) toward the loading port 35 of the grain tank 30 . As sensors with which the grains collide, a first grain amount sensor 50 located far from the input operation position 27 of the bucket 25 and a second grain amount sensor 54 located near the input operation position 27 of the bucket 25 are provided. It is Therefore, grains thrown far from the bucket 25 collide with the first grain amount sensor 50 , and grains thrown downward from the bucket 25 collide with the second grain amount sensor 54 .

In this way, it is possible to measure not only the amount of grain thrown far from the bucket 25, but also the amount of grain thrown downward from the bucket 25. The particle amount can be obtained with high accuracy.

In addition, since the guide 37 having the guide surface 38 is provided from above the throwing operation position 27 of the bucket 25 to above the grain tank 30, most of the grain thrown out from the bucket 25 is along the guide surface 38. and reliably guided to the flying grain tank 30. And since the 1st grain amount sensor 50 is provided in the edge part of the guide surface 38, most of grains collide with the 1st grain amount sensor 50 reliably. Therefore, the amount of grain thrown far from the bucket 25 can be obtained with high accuracy.

Here, since the plate-shaped first grain amount sensor 50 is vertical, the grain that collides with the first grain amount sensor 50 falls toward the grain tank 30 below, so that the It is put into the grain tank 30 .

In addition, since the second grain amount sensor 54 is provided on the boundary wall 45 between the input operation position 27 and the grain tank 30, the amount of grain thrown downward from the bucket 25 is almost completely measured. can do. In addition, the boundary wall 45, which is a conventional wall portion of the combine, can be effectively utilized, and the boundary wall 45 can firmly support the second grain amount sensor 54. As shown in FIG. Since the second grain amount sensor 54 is firmly supported, the accuracy of measurement by the second grain amount sensor 54 is stabilized.

In addition, since the detection surface of the second grain amount sensor 54 is inclined with respect to the horizontal direction, grains are less likely to accumulate on the second grain amount sensor 54 . Furthermore, since the detection surface of the second grain amount sensor 54 is lower on the grain tank 30 side, grains that collide with the detection surface of the second grain amount sensor 54 easily fall into the grain tank 30 . Here, if the inclination angle of the detection surface of the second grain amount sensor 54 is 20° or more and 30° or less with respect to the horizontal, not only is it difficult for grains to accumulate on the second grain amount sensor 54, Since the grain collides with the detection surface from a direction nearly perpendicular to the detection surface and a large impact value is obtained, the accuracy of measurement by the second grain amount sensor 54 is increased.

Further, in the present embodiment, the chain 24 is provided with a bucket-less section 29 in which the bucket 25 does not exist. Therefore, the grains are not thrown from the bucket 25, the grains do not collide with the first grain amount sensor 50 and the second grain amount sensor 54, and the first grain amount sensor 50 and the second grain amount sensor 54 can create a time zone in which only the value due to the disturbance is output from each of , and input to the control unit 64 .

Then, the control unit 64 obtains the zero point correction value from the respective disturbance values input from the first grain amount sensor 50 and the second grain amount sensor 54, and the bucket 25 passes the loading operation position 27. A zero point correction value is subtracted from each of the first impact value data and the second impact value data in the time zone in which the grain was thrown. As a result, the control unit 64 obtains the measured value (that is, the above-mentioned "collision value per throw (first Only "value obtained from impact value data)" and "collision value per throw (value obtained from second impact value data)") can be extracted.

Then, the control unit 64 converts each of these "collision values per throw" into the amount of grains, so that the amount of grains put into the grain tank 30 can be obtained with high accuracy.

In addition, since the temperature of the first grain amount sensor 50 and the second grain amount sensor 54 and the disturbance such as the vibration of the combine are constantly changing, the first grain amount sensor 50 and the second grain amount sensor 54 The influence of disturbances on the values input from to the control unit 64 is also constantly changing. However, in this embodiment, the control unit 64 calculates and updates the zero point correction value every 1.5 turns of the chain 24, and always uses the new zero point correction value to calculate the grain amount. ing. Therefore, the control unit 64 can always use the new zero-point correction value that follows the change in the disturbance to calculate the grain amount, and the grain amount to be put into the grain tank 30 can be obtained with high accuracy. can be done.

Further, when only one bucket 25 is removed from the chain 24 to form the no-bucket section 29, many grains are thrown out from the buckets 25 on both sides of the no-bucket section 29, and the first impact value data and the When the mountain-shaped waveform in the second shock value data becomes large, there is a possibility that a flat waveform formed only by the influence of the disturbance will not be formed between the two mountain-shaped waveforms.

However, in this embodiment, two buckets 25 are removed from the chain 24 to form a bucketless section 29 . Therefore, even if many grains are thrown out from the buckets 25 on both sides of the no-bucket section 29 and the mountain-shaped waveforms in the first impact value data and the second impact value data become large, the two mountain-shaped waveforms In between, a flat waveform consisting only of disturbance effects is reliably formed. Therefore, the controller 64 can calculate the zero point correction value.

The control unit 64 also calculates the statistical variation (the difference between the maximum value and the minimum value) in each cycle of the first shock value data and the second shock value data. Then, the control unit 64 determines that the grain collides with the first grain amount sensor 50 and the second grain amount sensor 54 by passing the no-bucket section 29 through the loading operation position 27 in a cycle with a small statistical variation. It is judged that it is a cycle when there is no. Therefore, it is not necessary to use a sensor or the like to detect that the no-bucket section 29 has passed the closing operation position 27 .

Next, a modified example will be described. Various modifications can be made to the above embodiment without departing from the scope of the invention. A plurality of modified examples will be described below. Any one of the plurality of modified examples described below may be applied to the above embodiment, or any one of the modified examples described below may be applied. or a combination of two or more may be applied. Moreover, various modifications other than the following modifications are possible.

(Modification 1)
The location where the first grain amount sensor 50 is provided may be any location above the grain tank 30 and farther from the input operation position 27 than the second grain amount sensor 54. It is not limited to the front end of the guide surface 38 in the insertion direction (rightward direction in FIG. 4).

4 may extend further forward in the input direction (rightward in FIG. 4) than the first grain amount sensor 50. As shown in FIG. In that case, it is assumed that the guide 37 extends up to the position of the first grain amount sensor 50, and the first grain amount sensor 50 is provided at the front end of the guide 37 in the throwing direction.

(Modification 2)
The location where the second grain amount sensor 54 is provided may be above the grain tank 30 and closer to the input operation position 27 than the first grain amount sensor 50 is. In the above-described embodiment, the second grain amount sensor 54 is provided on the uppermost part of the boundary wall 45 via the inclined portion 46 and the fixture 55, but it is not limited to such a form. For example, the second grain amount sensor 54 may be fixed directly to the top of the boundary wall 45 . Also, a second grain amount sensor 54 may be provided at a location below the top of the boundary wall 45 .

(Modification 3)
The distance of the no-bucket section 29 where no bucket 25 exists in the chain 24 is not limited to the distance of two buckets 25 . For example, the distance of the no-bucket section 29 may be a distance of three or more buckets 25 . However, the longer the no-bucket section 29 is, the worse the efficiency of collecting grains into the grain tank 30 is.

(Modification 4)
The method of outputting the pulse signal in association with the grain thrown out by the bucket 25 is not limited to the method of the above embodiment. There are a plurality of methods for outputting pulse signals, as exemplified below.

For example, the pick-up sensor 28 may detect a piece to be detected rotating together with the upper sprocket 23 and output a pulse signal. More specifically, a plurality of pieces to be detected are fixed in the vicinity of the outer peripheral portion of the sprocket 23 itself at regular intervals in the circumferential direction. Alternatively, a disc-shaped plate that rotates together with the sprocket 23 may be provided adjacent to the sprocket 23, and a plurality of pieces to be detected may be fixed to the outer periphery of the plate at equal intervals in the circumferential direction. In either case, the pick-up sensor 28 is fixed in the vicinity of the passing path of the piece to be detected. With this configuration, the piece to be detected passes in front of the pickup sensor 28 while the sprocket 23 is rotating. The pickup sensor 28 detects a piece to be detected and outputs a pulse signal every time the piece to be detected passes in front of it.

As another method, first, a plurality of pieces to be detected (not shown) are fixed to the chain 24 to which the bucket 25 is connected at regular intervals in the extending direction of the chain 24 . A pickup sensor 28 is fixed away from the upper sprocket 23 in the vicinity of the outer peripheral portion thereof. Therefore, when the chain 24 rotates around the outer peripheral portion of the sprocket 23 , the piece to be detected passes in front of the pickup sensor 28 . The pick-up sensor 28 outputs a pulse signal when detecting a piece to be detected passing in front of it. Three pieces to be detected are provided for one bucket 25 . Therefore, the pulse signal is output from the pick-up sensor 28 three times while the bucket 25 throws out the grains once.

As another method, a rotary encoder may be connected to the rotating shaft of the upper sprocket 23, and the rotary encoder may output a pulse signal each time the sprocket 23 rotates by a predetermined angle.

(Modification 5)
The statistical variation that the controller 64 uses when calculating the zero point correction value is not limited to the difference between the maximum value and the minimum value. The statistical variation used may be standard deviation, variance, or the like.

(Modification 6)
The number of pulse signals emitted while the bucket 25 throws out the grains once is not limited to three.

When the number of pulse signals emitted while the bucket 25 throws out the grains once is n times, the control unit 64 reads data for n cycles in step S3 of FIG. You should proceed. Also, in step S4 of FIG. 13, the control unit 64 may determine whether or not the statistical variation is equal to or less than the threshold for n consecutive cycles, and proceed with subsequent steps.

(Modification 7)
The method of obtaining the zero point correction value is not limited to the method of the above embodiment. The measured values of the first grain amount sensor 50 and the second grain amount sensor 54 in the time period when the no-bucket section 29 passed the feeding operation position 27 and grains were not fed into the grain tank 30 were , can be obtained as the zero point correction value of each sensor, and there are various specific methods of obtaining it.

As a method different from the above embodiment, there is the following method. In this method, as in the above-described embodiment, the control unit 64 controls the cycle of the first shock value data and the second shock value data to have a small statistical variation when grains are not charged into the grain tank 30. It is determined that it is the cycle when

Specifically, first, the control unit 64 calculates the average value and the statistical variation of the first shock value data within each period of 1.5 rounds of the chain 24 . Next, the control unit 64 selects a period that satisfies the following three conditions.
Condition 1: Statistical variation of values within the period is small.
Condition 2: The average value is small in each of the three cycles consisting of that cycle and the cycles before and after that cycle.
Condition 3: Statistical dispersion of the three average values of Condition 2 (average values for each of the three cycles) is small.

Note that the degree of smallness in each of the conditions 1 to 3 is appropriately set. For example, for each of the conditions 1 to 3, a threshold is set in advance as a reference for whether or not it can be said to be small. Then, when the statistical variation or average value is equal to or less than the threshold value, the control unit 64 determines that the condition is satisfied.

The period that satisfies these conditions 1 to 3 is the second period of the three periods in which the flat waveforms are arranged, and is the period during which the grains are not charged by the bucket 25 .

Then, the control unit 64 uses the average value in the cycle selected by this method as the zero point correction value of the first grain quantity sensor 50 . When a plurality of cycles can be selected by this method, the control unit 64 sets the minimum one of the respective average values in those cycles as the first grain amount sensor 50 zero point correction value.

The control unit 64 also obtains the zero point correction value of the second grain amount sensor 54 by the same method.

(Modification 8)
In the above-described embodiment, the control unit 64 determines from the first impact value data and the second impact value data for 1.5 turns of the chain 24 the The data was found, and the zero point correction value was obtained based on the first impact value data and the second impact value data at that time. However, "1.5 rounds" is just an example. The control unit 64 sets the length of the first impact value data and the second impact value data such that the data of the no-bucket section 29 is reliably included (specifically, the length exceeds one round of the chain 24). The data when the no-bucket section 29 passed through the closing operation position 27 can be found from among them.

(Modification 9)
Still another method of obtaining the zero point correction value will be described.

In this modified example, a sensor for detecting the no-bucket section 29 is provided inside the grain-hoisting conveyor 20 . The control unit 64 associates the signal output from the sensor with the first impact value data and the second impact value data, so that the no-bucket section 29 passes the charging operation position 27 and the grains are charged. Extract the data when it is not broken. Then, the control unit 64 obtains the zero point correction value from the data thus extracted as in the above embodiment.

A non-contact sensor 101 such as a proximity sensor (for example, an inductive type or a capacitive type) or an optical sensor can be used as the sensor. As shown in FIG. 14, such a non-contact sensor 101 is provided close to the passing path of the bucket 25 so that the bucket 25 passing in front of the non-contact sensor 101 can be detected.

If the non-contact sensor 101 is a sensor that detects the presence or absence of an object, the non-contact sensor 101 can detect the bucket 25 when the bucket 25 passes in front of it. The bucket 25 cannot be detected when the Also, in the case where the non-contact sensor 101 is a sensor that measures the distance to an object, the measured distance is short when the bucket 25 passes in front of the non-contact sensor 101, but the non-bucket section in front of the non-contact sensor 101 29 is passing, the measurement distance is longer. The control unit 64 associates the presence or absence of such detection and the change in the measured distance with the first impact value data and the second impact value data, respectively, and the no-bucket section 29 passes the throwing operation position 27 and the grain Extract the data when the input is not performed.

A contact sensor 102 can also be used as the sensor. For example, a contact sensor 102 shown in FIG. 14 has a detection piece that can be displaced around a rotating shaft 103 . The detection piece extends toward the bucket 25, and when the bucket 25 passes in front of the contact sensor 102, the detection piece is pushed by the bucket 25 and displaced about the rotating shaft 103 in the direction of arrow C in the figure. Contact sensor 102 measures the angle of position c<b>2 of the detection piece when it is pushed by bucket 25 with respect to reference position c<b>1 of the detection piece when it is not pushed by bucket 25 , and outputs the angle to control unit 64 .

Based on the angle of the position c2 of the detection piece when it is pushed by the bucket 25 with respect to the reference position c1 of the detection piece when it is not pushed by the bucket 25, the control unit 64 moves the bucket 25 in front of the contact sensor 102. is passing and when the no-bucket section 29 is passing in front of the contact sensor 102.例文帳に追加The control unit 64 associates the determination result with each of the first shock value data and the second shock value data, and when the no-bucket section 29 passes the throwing operation position 27 and grains are not thrown. data.

It should be noted that what has been described here is merely an example of how to use contact sensors and non-contact sensors.

Also, although both the non-contact sensor 101 and the contact sensor 102 are shown in FIG. 14, one of them is sufficient in practice. Also, the locations where the non-contact sensor 101 and the contact sensor 102 are provided are not limited to the illustrated location.

DESCRIPTION OF SYMBOLS 10... Harvesting part, 11... Feeder, 12... Thresher, 13... Sorter, 14... Transfer conveyor, 15... Unloading conveyor, 16... Grain discharging apparatus, 17... Intermediate conveying apparatus, 18... Conveyor-type conveying apparatus, 19 ... Receiving case 20 ... Grain raising conveyor 21 ... Grain raising tube 22 ... Sprocket 23 ... Sprocket 24 ... Chain 25 ... Bucket 26 ... Receiving part 27 ... Throwing operation position 28 ... Pickup sensor 29 Section without bucket 30 Grain tank 31 Leveling disc 32 Opening 33 Blade 34 Drive case 35 Input port 36 Ceiling member 37 Guide 38 Guide surface 40 ... Push type switch 41 ... Top surface part 42 ... Side wall 43 ... Opening 45 ... Boundary wall 46 ... Inclined part 50 ... First grain amount sensor 51 ... Mounting tool 54 ... Second grain amount Sensor 55 Mounting tool 60 Driver's cab 61 Reaping switch 62 Display unit 63 Engine speed sensor 64 Control unit 70 Shaft 71 First pulley 72 Belt 73 Detecting sprocket 74 Thread 75 Rotating shaft 76 Rotating shaft 77 Second pulley 78 Third pulley 101 Non-contact sensor 102 Contact sensor 103 Rotating shaft

Claims (5)

A threshing device for threshing harvested stems, a storage unit for storing grains threshed by the threshing device, and grains threshed by the threshing device toward an upper opening of the storage unit. In a combine harvester provided with a bucket that is thrown in from the lateral direction and a sensor for determining the amount of grains thrown into the storage part from the bucket is provided above the storage part,
A combine harvester comprising, as the sensors, a first grain amount sensor located far from the loading operation position of the bucket and a second grain amount sensor located near the loading operation position of the bucket. . 2. The method according to claim 1, wherein a guide for guiding grains is provided from above the input operation position to above the storage part, and the first grain amount sensor is provided on the grain input direction side of the guide. combine. The combine according to claim 1 or 2, wherein said second grain amount sensor is provided on a boundary wall between said input operation position and said storage section. The combine according to claim 3, wherein the detection surface of the second grain amount sensor is inclined with respect to the horizontal direction, and is low on the storage section side. A plurality of the buckets are connected side by side to a chain, and a bucket-free section in which the buckets do not exist is formed in a part of the chain,
By the plurality of buckets circling between the receiving portion for scooping the threshed grains and the throwing operation position, the chain circulates,
A time zone in which grains are input from the bucket and a time zone in which grains are not input from the bucket are formed,
The measured value of the sensor during a time period when grains are not fed from the bucket is subtracted from the sensor measured value during a time period when grains are fed from the bucket, and the result of the subtraction is the grain amount. converted to
The combine according to any one of claims 1-4.

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