JP2015082982A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester capable of recognizing the abnormality of detecting means which is difficult to detect with only the information of detecting means for detecting an impact force due to the grain poured by a blade.SOLUTION: A combine harvester comprises: a storage part 4 for storing grains threshed by a thresher; a storage amount detection part 4c for detecting that grains are stored up to a predetermined position in the storage part 4; a pouring part 23b for pouring the grains fed from the thresher into the storage part 4; detection means for detecting an impact force by the grains poured into the storage part 4; and calculation means for calculating the grain amount on the basis of the impact force detected by the detection means. It is determined whether or not the ratio of the difference between the grain amount detected by the storage amount detection part 4c and the grain amount calculated by the calculation means, to the grain amount detected by the storage amount detection part 4c is larger than a predetermined value. In the case where it is determined that the ratio of the difference is larger than the predetermined value, the combine harvester is characterized by notifying of the abnormality of the detection means.

Description

  The present invention relates to a combine that can detect the amount of grain stored in a tank.

  When performing harvesting work in a field, a combine that performs harvesting and threshing of grains and recovery of grains is often used. The combine travels on the field with a crawler, and harvests the culm with a cutting blade during the travel, conveys the harvested culm to the handling cylinder, and threshes. Then, the chaff sheave and tang that are arranged below the barrel are used to sort the koji and grains separated from the koji, and the selected grains are collected in a grain tank via a screw conveyor (for example, Patent Documents). 1).

  The combine described in Patent Document 1 is provided with a slat for throwing the grain into the grain tank at the tip of the screw conveyor, and the impact force caused by the grain thrown into the grain tank by the slat is provided in the grain tank. Detection means (pressure sensor) for detecting is provided. A pickup sensor for detecting the rotation period of the screw conveyor is also provided. The pick-up sensor calculates the period during which the blades put the grain into the grain tank, and the detection value detected by the pressure sensor during this period is detected when the grain is in contact with the pressure sensor. The detected value detected by the pressure sensor outside the period is determined as the detected value due to the disturbance. After accumulating the values detected during the period, the accumulated value is corrected based on the values detected outside the period, and the grain amount is accurately obtained. The combine is provided with the control part, and the calculation of the grain amount mentioned above is performed in this control part.

  When an abnormality occurs in the pressure sensor, the grain amount obtained based on the detection value of the pressure sensor does not correspond to the grain amount stored in the grain tank. If a disconnection or a short circuit occurs in the pressure sensor, the control unit can recognize the disconnection or the short circuit of the pressure sensor by taking in a signal from the pressure sensor.

JP 2011-223959 A

  However, when a sensitivity failure due to secular change or a deviation of the mounting position with respect to a predetermined position occurs in the pressure sensor, the control unit cannot determine the abnormality of the pressure sensor only by a signal from the pressure sensor.

  The present invention has been made in view of such circumstances, and a combiner that can recognize an abnormality of a detection means that is difficult to detect only by information from a detection means that detects an impact force caused by a grain thrown in by a blade. The purpose is to provide.

  The combine according to the first invention is provided in the threshing apparatus for threshing the harvested cereal, the storage part for storing the grains threshed by the threshing apparatus, and in the storage part. A storage amount detection unit for detecting that the grain has been stored up to a predetermined position, an input unit for inputting the grain supplied from the threshing device to the storage unit, and an impact force caused by the grain input to the storage unit In a combine comprising a detecting means for detecting the amount and a calculating means for calculating a grain amount based on the impact force detected by the detecting means, the storage with respect to the grain amount detected by the storage amount detecting unit Determining means for determining whether a ratio of the difference between the grain amount detected by the amount detecting unit and the grain amount calculated by the calculating means is greater than a predetermined value; and When the ratio is larger than the predetermined value , Characterized in that it comprises a notifying means for informing the abnormality of the detection means.

  In the present invention, when the ratio of the difference with respect to the amount of grain detected by the storage amount detection unit is larger than a predetermined value, the detection means abnormality that is difficult to detect only by information from the detection means, for example, detection by secular change It detects a sensitivity failure of the means or a deviation in the mounting position of the detection means.

  A combine according to a second aspect of the present invention is disposed in the storage unit, a harvesting unit that harvests the culm by power from the drive source, a harvesting clutch that connects or disconnects the transmission path between the harvesting unit and the drive source, and the storage unit. A discharge part that discharges the grains stored in the storage part by power from the drive source, and a discharge clutch that connects or disconnects a conduction path between the discharge part and the drive source, The amount detection unit is a push-type switch, and the notification unit detects the detection when the connection of the harvesting clutch is continued and the disconnection of the discharge clutch is continued until the storage amount detection unit is pressed. An abnormality of the means is reported.

  In the present invention, the grain amount detected by each of the detection means and the storage amount detection unit is compared in a period in which the grain reaping is continuously performed and the kernel is never discharged from the storage unit. To do. That is, after the discharge of the kernel from the storage unit is completed and the stored amount of the kernel in the storage unit is reset, the detected both kernel amounts are compared, so that the difference between the two can be obtained with high accuracy.

  In the combine according to the third aspect of the present invention, a plurality of the storage amount detection units are arranged in the vertical direction in the storage unit, and the determination means is above the one storage amount detection unit and the one storage amount detection unit. The one storage amount detection from the time when the one storage amount detection unit is pressed with respect to the amount of grain stored between the one and other storage amount detection units, which is detected by the other storage amount detection unit located. The amount of grain calculated by the calculation means and the grain stored between the one and other storage amount detection units until the time when another storage amount detection unit located above the unit is pressed It is characterized in that it is determined whether or not the ratio of the difference from the quantity is larger than a predetermined value.

  In the present invention, since the abnormality of the detection means is determined based on the amount of grain stored between the two storage amount detection units, the manufacturer or the user can store two desired storages at the time of manufacturing or setting the combine. It is possible to select the amount detection unit and adjust the period for determining the abnormality of the detection means.

  In the combine according to the present invention, when the ratio of the difference with respect to the amount of grain detected by the storage amount detection unit is larger than a predetermined value, the abnormality of the detection means that is difficult to detect only by information from the detection means, For example, it is possible to detect an abnormality of the detection means by detecting a sensitivity failure of the detection means due to secular change or a deviation in the mounting position of the detection means.

1 is an external perspective view of a combine according to Embodiment 1. FIG. It is side surface sectional drawing which outlines the internal structure of a threshing apparatus. It is a longitudinal cross-sectional view which outlines a grain tank. It is a transmission mechanism figure which shows the transmission path of the driving force of an engine schematically. It is a block diagram which shows the structure of a control part. It is an example of the graph which shows the relationship between the detected value of a spout sensor, and the detected value of a pickup sensor. It is a flowchart explaining the process which determines the abnormality of a spout sensor by a control part. It is a flowchart explaining the process which determines the abnormality of a spout sensor by the control part of the combine which concerns on Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the present invention will be described based on the drawings showing the combine according to the first embodiment. FIG. 1 is an external perspective view of a combine.

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

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

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

  Four dust feed valves 10 a, 10 a, 10 a, 10 a are arranged in parallel in the front-rear direction on the upper wall of the handling chamber 10, and the dust feed valve 10 a is an amount of straw and grains to be sent to the rear part of the handling chamber 10. Adjust.

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

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

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

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

  The first screw conveyor 23 takes in the grain that has slid down the first grain plate 22 and feeds it to the grain tank 4. A spout 4 b is provided on the side surface of the grain tank 4, and the grain is put into the grain tank 4 from the spout 4 b.

  At the rear of the first grain plate 22, an inclined plate 24 inclined downward is provided continuously. A second grain plate 25 inclined downward toward the front is connected to the rear end of the inclined plate 24. A second screw conveyor 26 is provided on the upper side of the connecting portion between the second grain plate 25 and the inclined plate 24 to convey straw and grains.

  Falling objects that have fallen onto the inclined plate 24 or the second grain plate 25 from the through holes of the Strollac 19 slide down toward the second screw conveyor 26. The fallen fallen object is conveyed to the processing rotor 14 provided on the left side of the handling cylinder 11 by the second screw conveyor 26 and is threshed by the processing rotor 14.

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

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

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

  On the upper side of the upper suction cover 31, below the processing chamber 13, there is provided a sluice 35 that is inclined with the front facing downward. The processed material (grains, straws, etc.) that has been loosened by the processing net 13d of the processing chamber 13 and dropped from the processing net 13d falls to the chaff sheave 18 or the stroll rack 19. The discharged material discharged from the rear end portion of the processing net 13d slides down the downflow rod 35 and falls onto the stroller 19.

  A loss sensor 34 for detecting the amount of discharged grain is provided between the discharge passage 37 and the Strollac 19. The grains that have passed over the Strollac 19 collide with the loss sensor 34. The loss sensor 34 includes a piezoelectric element, and a voltage signal is output from the loss sensor 34 due to the collision of the grains, and the amount of grain discharged from the dust outlet 33 and the discharge passage 37 is detected.

  FIG. 3 is a longitudinal sectional view schematically showing the grain tank 4. As shown in FIG. 3, a rectangular blade plate 23 b is provided on the shaft portion 23 c at the upper end of the first screw conveyor 23. The vane plate 23b protrudes in the radial direction about the shaft portion 23c. The vane plate 23b rotates in synchronism with the screw conveyor 23. A pickup sensor 51 is provided in the vicinity of the upper end of the shaft portion 23c (see FIG. 4).

  The shaft portion 23 c and the blade plate 23 b are accommodated in the casing 140. The casing 140 includes a side surface 141 that covers the periphery of the shaft portion 23c and the blade plate 23b. The side surface 141 faces the side surface of the grain tank 4 with the shaft portion 23c and the blade plate 23b interposed therebetween.

  A spout 4 b is provided on the side surface of the grain tank 4. The slat 23b faces the spout 4b.

  The grain that has fallen from the grain sieve 20 onto the first grain plate 22 slides down toward the first screw conveyor 23. The dropped grain is conveyed by the screw conveyor 23 first. Centrifugal force acts on the grain, and the grain ascends along the outer periphery of the screw conveyor 23 first. The slat 23b pushes the grain toward the spout 4b.

  As shown in FIG. 3, a plurality of push-type switches 4c, 4c,... As the grain is stored in the grain tank 4, the push switch 4 c is pressed in order from the lower side by the stored grain. The pressed switch 4c that has been pressed outputs a signal, and a control unit, which will be described later, recognizes the storage amount based on the signal.

  Further, a spout sensor 300 (detection means) for detecting the impact value of the grain thrown in from the spout 4 b is arranged in the grain tank 4. A support member 310 is suspended from the top surface of the grain tank 4, and the spout sensor 300 is fixed to the support member 310.

  The spout sensor 300 is disposed above the lower edge of the spout 4b. Moreover, when the grain tank 4 becomes full, it is located above the upper surface of the grain stored in the grain tank 4. In other words, the spout sensor 300 is arranged at the vertical position and the depth position that are not buried in the grain when full.

  As shown by broken line arrows in FIG. 3, the extruded grain moves diagonally upward by the combination of the upward force received from the first screw conveyor 23 and the lateral force received from the blades 23b. Collides with sensor 300.

  The grain is intermittently thrown into the grain tank 4 from the spout 4b by the rotation of the blades 23b. Every time the input grain collides with the spout sensor 300, a voltage is output from the strain gauge, and the amount of the grain is calculated by the control unit based on the output voltage.

  The bottom surface of the grain tank 4 is formed in a cone shape protruding downward. A discharge screw conveyor 48 for discharging the grains is provided at the bottom of the bottom surface. The discharge screw conveyor 48 extends toward the auger 4a. By the operation of the discharge screw conveyor 48, the grains stored in the grain tank 4 are discharged to the outside through the auger 4a.

  The combine includes an engine 40 (drive source). FIG. 4 is a transmission mechanism diagram schematically showing the transmission path of the driving force of the engine 40.

  As shown in FIG. 4, the engine 40 is connected to a traveling mission 42 via an HST (Hydro Static Transmission) 41. The engine 40 is provided with an engine load detection sensor 40a that detects a load on the engine. The engine load detection sensor 40 a detects a load on the engine 40 based on the fuel injection amount of the engine 40. The engine 40 is rated and controlled so as to maintain a constant rotational speed, and the magnitude of the fuel injection amount corresponds to the magnitude of the load on the engine 40. An engine load indicator on the display unit to be described later lights up based on the output signal of the engine load detection sensor 40a.

  The HST 41 has a hydraulic pump (not shown), a mechanism (not shown) for adjusting the flow rate of hydraulic oil supplied to the hydraulic pump and the pressure of the hydraulic pump, and a transmission circuit 41a for controlling the mechanism. .

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

  The engine 40 is connected to the handling cylinder 11 and the processing cylinder 13b through an electromagnetic threshing clutch 44, and is also connected to a transmission mechanism 50. The transmission mechanism 50 is connected to the first screw conveyor 23.

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

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

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

  Further, the driving force of the engine 40 is transmitted to the discharge screw conveyor 48 via the discharge clutch 47, and the discharge screw conveyor 48 discharges the grains stored in the grain tank 4 to the outside.

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

  A control unit 100 that calculates the amount of grain stored in the grain tank 4 is mounted on the combine. FIG. 5 is a block diagram illustrating a configuration of the control unit 100.

  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 connected to each other by an internal bus 100g. ing. The CPU 100a reads the control program stored in the ROM 100b into the RAM 100c, and executes necessary control according to the control program. The CPU 100a has a built-in timer.

  In addition, a reference value to be described later is set in the EEPROM 100d. A correction variable X is set, and a value is stored in the correction variable X as necessary. In addition, a threshold value α for determining whether or not the detection value of the spout sensor 300 is included in the calculation target of the grain amount and a minimum value β that should be constantly input by disturbance are set. When the grain discharge from the grain tank 4 is completed, a flag is set in the EEPROM 100d.

  The EEPROM 100d stores a value indicating the amount of grain stored up to the position of each push switch 4c in association with each push switch 4c.

  The flag is set when the following conditions are satisfied. The pressing switch 4c provided at the lowest position in the grain tank 4 is turned off, the discharging switch 82 is turned on, and the pressing switch 4c is turned off for a predetermined time (most time). This is a case in which a sufficient time has passed for all the grains remaining in the grain tank 4 to be discharged by the operation of the discharge screw conveyor 48 after the push switch 4c provided at the lower position is turned off. . The timer of the CPU 100a measures the predetermined time. When the discharge switch 82 is turned off and turned on again after a predetermined time has elapsed, the setting of the flag is cancelled.

  The control unit 100 outputs a connection or disconnection signal to the threshing clutch 44, the mowing clutch 46, and the discharge clutch 47 through the output interface 100f. Further, the control unit 100 outputs a display signal indicating that a predetermined video is displayed on the display unit 83 via the output interface 100f. Further, the control unit 100 outputs a lighting or extinguishing signal to the notification lamp 84.

  The output signals of the cutting switch 80, the spout sensor 300, the push switch 4c, the pickup sensor 51, the engine load detection sensor 40a, the threshing switch 85, and the discharge switch 82 are input to the control unit 100 via the input interface 100e. .

  Note that a dashboard panel (not shown) is provided in the cabin 8, a cutting switch 80, a discharge switch 82 and a threshing switch 85 are provided on the dashboard panel, and a display unit 83 having a liquid crystal panel is provided. It is provided.

  Corresponding to ON / OFF of the cutting switch 80, the cutting clutch 46 and the threshing clutch 44 are connected or disconnected. Further, the discharge clutch 47 is connected or disconnected in response to the on / off of the discharge switch 82. Further, the threshing clutch 44 is connected or disconnected corresponding to the on / off of the threshing switch 85.

  The CPU 100a integrates the detection values related to the output signal of the spout sensor 300, and determines whether or not to include the detected value in comparison with the threshold value α. The detection value included in the integration target is stored in the EEPROM 100d in synchronization with the detection value related to the output signal of the pickup sensor 51.

  FIG. 6 is an example of a graph showing the relationship between the detection value of the spout sensor 300 and the detection value of the pickup sensor 51. FIG. 6A is a graph showing the relationship between time and the detection value of the spout sensor 300. The detection value of the spout sensor 300 indicates the amount of distortion due to the collision of the grain, and is a moving average value at a predetermined sampling number. FIG. 6B is a graph showing the relationship between time and the detection value of the pickup sensor 51. The detection value of the pickup sensor 51 indicates the rotation start time and rotation end time in one rotation of the blade plate 23b. In the following description, the subscript of the period P in FIG. 6 is omitted as appropriate.

  The detection value of the pickup sensor 51 is detected as a pulse wave, and the interval between the pulse waves corresponds to the cycle of one rotation of the screw conveyor 23 (rotary shaft 23c), that is, the cycle P of one rotation of the blade plate 23b. Note that the reciprocal of the period P corresponds to the rotation speed, and the period P can also be regarded as the rotation speed. The CPU 100a takes in the detection value of the spout sensor 300 at a predetermined sampling period (for example, 100 [ms]) and stores it in the EEPROM 100d. The CPU 100a creates a time stamp each time a pulse wave is input from the pickup sensor 51, and associates the time stamp with the detection value input from the spout sensor 300 when the pulse wave is input. To remember.

  In FIG. 6, when the grain is put into the grain tank 4 by the blade 23b, the detection value by the collision of the grain is input from the spout sensor 300 to the CPU 100a during P / 4 to 3P / 4. The The detection value input from 0 to P / 4 and 3P / 4 to P from the spout sensor 300 to the CPU 100a is a detection value when the grain does not collide with the spout sensor 300.

  In FIG. 6A, the threshold value α corresponds to a detection value detected by the spout sensor 300 due to disturbances such as temperature characteristics of the spout sensor 300, wind pressure by the blades 23b, and inclination of the airframe 9. When the grain is not put into the grain tank 4 by the blade 23b, ideally, the detected value due to the collision of the grain is input from the spout sensor 300 to the CPU 100a during P / 4 to 3P / 4. Not. However, actually, a detection value (threshold value α) due to disturbance (for example, wind pressure by the blade 23b) is input from the spout sensor 300 to the CPU 100a.

  The CPU 100a compares the detection value input from the spout sensor 300 during the period P / 4 to 3P / 4 with the threshold value α. When the detected value includes a value exceeding the threshold value α, the CPU 100a determines that the detected value input between P / 4 to 3P / 4 is to be integrated (period P1 in FIG. 6A). , P2 and P5 area of broken line hatched portion). The value to be integrated corresponds to the impulse by the collision of the grain with the spout sensor 300.

  When the detected value does not include a value that exceeds the threshold value α, the CPU 100a excludes the detected value input between P / 4 to 3P / 4 from the targets to be integrated (in FIG. 6A, the period P3). And P4 part).

  On the other hand, a value obtained by integrating the detection values of the spout sensor 300 between 0 and P / 4 and 3P / 4 and P (area of the hatched portion in FIG. 6A) corresponds to a steady deviation. The steady deviation is caused by vibration of the engine 40, vibration propagated to the spout sensor 300 while traveling on a rough field, characteristics of the spout sensor 300, and the like.

  The CPU 100a performs necessary processing on a value obtained by integrating the detection values of the spout sensor 300 between 0-P / 4 and 3P / 4-P in a predetermined cycle (for example, 1 [s]), and accesses the EEPROM 100d. And stored in the correction variable X.

  The CPU 100a accesses the EEPROM 100d, refers to the time stamp, and integrates the detection values of the spout sensor 300 between P / 4 and 3P / 4. Then, the steady deviation included in the integrated value is removed using the value stored in the correction variable X. For example, the value stored in the correction variable X is subtracted from the integrated value.

  The CPU 100a stores the correction value D from which the steady deviation is removed in the RAM 100c. Based on the correction value D, the grain amount stored in the grain tank 4 is calculated.

FIG. 7 is a flowchart for explaining processing for determining abnormality of the spout sensor by the control unit 100.
The CPU 100a of the control unit 100 stands by until a flag indicating that the grain discharge from the grain tank 4 has been completed is set in the EEPROM 100d (step S1: NO). When the flag is set in the EEPROM 100d (step S1: YES), the CPU 100a waits until the predetermined push switch 4c is turned on (step S2: NO).

  When the predetermined pressing switch 4c is turned on (step S2: YES), the CPU 100a determines whether or not the cutting switch 80 is turned on (step S3).

  When the cutting switch 80 is off (step S3: NO), the CPU 100a ends the process. When the cutting switch 80 is on (step S3: YES), the CPU 100a determines whether or not the discharge switch 82 is off (step S4).

  When the discharge switch 82 is on (step S4: NO), the CPU 100a ends the process. When the discharge switch 82 is off (step S4: YES), the CPU 100a determines whether or not the spout sensor 300 is operating (step S5).

  Specifically, the CPU 100a determines whether or not a value equal to or greater than the above-described threshold β is input from the spout sensor 300. The threshold value β is the lowest value that should be steadily input due to a disturbance. When the threshold value β is not input from the spout sensor 300, the spout sensor 300 is disconnected or short-circuited. May not work.

  When the spout sensor 300 is not operating (step S5: NO), the CPU 100a outputs a lighting signal to the notification lamp 84 to notify the abnormality of the spout sensor 300 (step S8). When the spout sensor 300 is operating (step S5: YES), the CPU 100a turns on the grain amount (calculated value) calculated based on the output from the spout sensor 300 as described above and the push switch 4c. The difference of the grain amount (reserved value) obtained by is calculated (step S6). The CPU 100a refers to the EEPROM 100d and obtains the grain amount (stored value) stored in the grain tank 4 up to the position of the pressed switch 4c.

  Then, the CPU 100a divides the calculated difference value by the stored value, and determines whether or not the divided value is equal to or greater than the reference value (step S7). Examples of the reference value include 0.3 to 0.5.

  When the divided value is not equal to or greater than the reference value (step S7: NO), the CPU 100a ends the process. When the divided value is equal to or greater than the reference value (step S7: YES), the CPU 100a outputs a lighting signal to the notification lamp 84 to notify the abnormality of the spout sensor 300 (step S8).

  When the divided value is equal to or greater than the reference value, the calculated value is greatly deviated from the stored value although the spout sensor 300 is operating. Therefore, there is a possibility that a poor sensitivity due to deterioration over time has occurred in the spout sensor 300 or the mounting position of the spout sensor 300 is deviated. By notifying the abnormality, the user can be prompted to confirm the state of the spout sensor 300. In order to check the state of the spout sensor 300, the reference value is preferably 0.3 or more.

  In the combine according to the first embodiment, when the ratio of the difference value with respect to the stored value is larger than a predetermined value, an abnormality of the spout sensor 300 that is difficult to detect with only the information from the spout sensor 300, for example, secular change It is possible to detect an abnormality in the spout sensor 300 by detecting a sensitivity failure of the spout sensor 300 or a deviation in the mounting position of the spout sensor 300.

  Moreover, in the period when grain harvesting is continuously performed and the grain is never discharged from the storage unit (see Steps S1 to S4), it is detected by the spout sensor 300 and the press switch 4c, respectively. Compare the calculated value and the stored value. That is, after the kernel discharge from the kernel tank 4 is completed and the stored amount of the kernel in the kernel tank 4 is reset, both detected kernel amounts are compared, and thus the difference between the two is accurately obtained. be able to.

  Instead of the notification lamp 84, a buzzer may be installed to notify the abnormality of the spout sensor 300 by a notification sound. Information indicating an abnormality of the spout sensor 300 may be displayed on the display unit 83.

(Embodiment 2)
Hereinafter, the present invention will be described based on the drawings showing the combine according to the second embodiment. FIG. 8 is a flowchart for explaining processing for determining abnormality of the spout sensor by the control unit 100. In the second embodiment, the amount of grain stored between any two pressing switches 4c arranged vertically is used as the storage amount.

  The CPU 100a of the control unit 100 waits until a flag indicating that the grain discharge from the grain tank 4 has been completed is set in the EEPROM 100d (step S21: NO). When the flag is set in the EEPROM 100d (step S21: YES), the CPU 100a waits until the lower push switch 4c is turned on (step S22: NO).

  When the lower pressure switch 4c is turned on (step S22: YES), the CPU 100a waits until the upper pressure switch 4c is turned on (step S23: NO). When the upper pressing switch 4c is turned on (step S23: YES), the CPU 100a determines whether or not the cutting switch 80 is turned on (step S24).

  When the cutting switch 80 is off (step S24: NO), the CPU 100a ends the process. When the cutting switch 80 is on (step S24: YES), the CPU 100a determines whether or not the discharge switch 82 is off (step S25).

  When the discharge switch 82 is on (step S25: NO), the CPU 100a ends the process. When the discharge switch 82 is off (step S25: YES), the CPU 100a determines whether or not the spout sensor 300 is operating (step S26).

  When the spout sensor 300 is not operating (step S26: NO), the CPU 100a outputs a lighting signal to the notification lamp 84 to notify the abnormality of the spout sensor 300 (step S29). When the spout sensor 300 is operating (step S26: YES), the CPU 100a turns on the grain amount (calculated value) calculated based on the output from the spout sensor 300 as described above and the push switch 4c. The difference of the grain amount (reserved value) obtained by is calculated (step S27). The CPU 100a refers to the EEPROM 100d and obtains the difference between the grain amount corresponding to the position of the upper pressing switch 4c that is turned on and the grain amount corresponding to the position of the lower pressing switch 4c as a stored value.

  Then, the CPU 100a divides the calculated difference value by the stored value, and determines whether or not the divided value is equal to or greater than the reference value (step S28). If the divided value is not greater than or equal to the reference value (step S28: NO), the CPU 100a ends the process. When the divided value is equal to or greater than the reference value (step S28: YES), the CPU 100a outputs a lighting signal to the notification lamp 84 to notify the abnormality of the spout sensor 300 (step S29).

  In the combine according to the second embodiment, since the abnormality of the spout sensor 300 is determined based on the amount of grain stored between the two press switches 4c, 4c, the desired two press switches 4c, Only by using 4c, it is possible to adjust the period during which the abnormality of the spout sensor 300 is determined. That is, when the combine is manufactured or set, the manufacturer or the user can select the two push switches 4c and 4c to adjust the period during which the abnormality of the spout sensor 300 is determined.

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

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

2 Threshing device 4 Grain tank (storage part)
4c Press switch (reserved amount detection unit)
23b Blade (input part)
300 Throwing sensor (detection means)
40 Engine 3 Mowing section 46 Mowing clutch 47 Discharge clutch 48 Discharge screw conveyor (discharge section)
84 Notification lamp 100 Control unit (calculation means, determination means)
100a CPU
100b ROM
100c RAM
100d EEPROM
100e input interface 100f output interface

Claims (3)

A threshing device for threshing the harvested cereals, a storage unit for storing the threshed grains by the threshing device, and a storage unit that is provided in the storage unit, and the kernels are stored up to a predetermined position in the storage unit A storage amount detection unit for detecting this, an input unit for supplying the grain supplied from the threshing device to the storage unit, a detection means for detecting an impact force caused by the grain input to the storage unit, Based on the impact force detected by the detection means, in a combine comprising a calculation means for calculating the amount of grain,
Whether the ratio of the difference between the grain amount detected by the storage amount detection unit and the grain amount calculated by the calculation unit with respect to the grain amount detected by the storage amount detection unit is greater than a predetermined value Determination means for determining whether or not
Combiner comprising: a notifying means for notifying the abnormality of the detecting means when the ratio of the difference is larger than the predetermined value by the determining means. A harvesting section that harvests cereal grains by power from a driving source;
A cutting clutch that connects or disconnects the transmission path between the cutting unit and the drive source;
A discharge part that is arranged in the storage part and discharges the grains stored in the storage part by power from the drive source;
A discharge clutch for connecting or disconnecting the conduction path between the discharge unit and the drive source,
The storage amount detection unit is a push-type switch,
The notification means notifies the abnormality of the detection means when the connection of the harvesting clutch is continued and the disconnection of the discharge clutch is continued until the storage amount detection unit is pressed. The combine according to claim 1. A plurality of the storage amount detection units are arranged vertically in the storage unit,
The determination means includes
Detected by one storage amount detection unit and another storage amount detection unit located above the one storage amount detection unit, and with respect to the amount of grain stored between the one and other storage amount detection units, Kernel calculated by the calculation means from the time when one storage amount detection unit is pressed to the time when another storage amount detection unit located above the one storage amount detection unit is pressed The ratio of the difference between the amount and the amount of grain stored between the one and other stored amount detection units is determined whether or not it is larger than a predetermined value. Combine.

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