JP2006246831A - Combine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine capable of reducing the generation of loss of cereal grains by a sampling as less as possible while maintaining the reliability of the measured values by a measuring sensor in measuring the characteristics of the cereal grains. <P>SOLUTION: This combine equipped with a measuring sensor 35 for measuring the characteristics of the cereal grains during its harvesting work, and a controlling device 100 managing the control of the measuring sensor is constituted with that the controlling device 100 performs a preliminary measurement sampling by a prescribed preliminary sampling period (t1) regarding to the measurement of the characteristics of the cereal grins by the measuring sensor 35, obtaining a main measurement sampling period (t2) based on the unevenness σ of the measured values obtained by the preliminary measurement sampling and then performing the main measurement sampling by the main sampling period (t2). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a combine.

  As a conventional combine, the cereal is harvested by the reaping part, the cerealed cereal is threshed by the threshing part, and the cerealed cereal (relief) is released to the outside of the machine by the exclusion process part. A grain is selected from the threshed grain and waste by a sorting unit, and the selected grain is supplied to a Glen tank via a frying cylinder, and the supplied grain is placed in the Glen tank. Some harvesting operations are performed such that the stored grains are discharged from the grain tank to the outside by a grain discharging device. In such a combine, the grain harvested during the harvesting operation is sampled by a measurement sensor to measure the grain properties, and the properties of the whole harvested grain are obtained based on the measured grain properties. Sometimes.

  In this case, it is only necessary to be able to measure without damaging the grain to be sampled. However, if measurement is attempted without damaging the grain to be sampled, it is difficult to perform highly accurate measurement due to a large measurement error. It is. Therefore, in order to obtain a highly accurate measurement value, for example, it is necessary to crush the grain to be sampled and measure the properties, and this causes a grain loss due to sampling.

  Specifically, the case of measuring the moisture content of a grain will be described as an example. Using a moisture sensor, a part of the grain supplied to the grain tank during the harvesting operation is crushed to produce the grain. When measuring the moisture content of a grain, the grain after measurement in a crushed state after the moisture content is measured by a moisture sensor becomes a grain loss due to sampling, and the grain after measurement is placed in the Glen tank. Stored or discharged outside the machine.

  As described above, when the crushed grain (grain loss due to sampling) in the crushed state after the moisture amount is measured by the moisture sensor is stored in the glen tank, the harvested grain obtained by the harvesting operation is obtained. This is not preferable because grains after the measurement are mixed in. Even when discharged outside the machine, the grain is left in the field after the measurement, so that the appearance is not good.

  The present invention has been made in view of the prior art, and when measuring the properties of the grain, the occurrence of grain loss due to sampling is reduced as much as possible while ensuring the reliability of the measurement value by the measurement sensor. It is an object to provide a combine that can be used.

  In order to solve the above-mentioned problem, the present invention is a combine comprising a measurement sensor for measuring the properties of a grain during a harvesting operation, and a control device for controlling the measurement sensor, the control device comprising: Regarding the measurement of grain properties by the measurement sensor, preliminary measurement sampling is performed at a predetermined preliminary measurement sampling period, and the main measurement sampling period is obtained based on variations in the measurement values obtained by the preliminary measurement sampling. The present invention provides a combine that is configured to perform the main measurement sampling.

  As the “variation” in the present invention, a standard deviation or a dispersion can be given as a representative example.

  In the combine according to the present invention, regarding measurement of grain properties by the measurement sensor, preliminary measurement sampling is performed at a predetermined preliminary measurement sampling period, and the main measurement sampling period is set based on variations in the measurement values obtained by the preliminary measurement sampling. Since the main measurement sampling is performed in the main measurement sampling period, for example, when the variation of the measurement value obtained by the preliminary measurement sampling is smaller than a predetermined reference variation, the main measurement sampling period is set to be less than the preliminary measurement sampling period. By making the length longer, the main measurement sampling rate obtained by dividing the number of main measurement samples by the main measurement section sampled by the main measurement sampling is set to be larger than the preliminary measurement sampling rate obtained by dividing the number of preliminary measurement samples by the preliminary measurement section. Can be small.

  As described above, according to the combine according to the present invention, when the variation of the measurement value obtained by the preliminary measurement sampling is small, the main measurement sampling period is set longer than the preliminary measurement sampling period. Since the rate can be made smaller than the preliminary measurement sampling rate, when measuring the properties of the grain, the occurrence of grain loss due to sampling is as much as possible while ensuring the reliability of the measurement value by the measurement sensor. Can be reduced.

  When the variation in the measurement value obtained by the preliminary measurement sampling is equal to or larger than the predetermined reference variation, the main measurement sampling period is made equal to the preliminary measurement sampling period, and the main measurement is performed. The sampling rate can be made equal to the preliminary measurement sampling rate.

The combine which concerns on this invention can illustrate the case where the said control apparatus is comprised so that the said preliminary measurement sampling may be performed in a predetermined preliminary measurement area. This preliminary measurement section can be set as follows. That is,
(A) When the preliminary measurement section is set based on the harvesting work time of the combine,
(B) When the preliminary measurement section is set based on the harvesting work distance of the combine,
(C) When the preliminary measurement section is set by an operator's manual operation,

  Also, a GPS (Global Positioning System) device is installed, information on the area and shape of the field to be harvested is acquired from the GPS data from the GPS device, and the preliminary measurement section is obtained during the harvesting operation. It is good also as a locus | trajectory of a combine (For example, time from the harvest start of a combine to the time when it goes round the outer periphery of a field).

  The control device may be configured to obtain an average measurement value based on the measurement value of the main measurement sample number obtained by the main measurement sampling, or may be configured to determine the number of the preliminary measurement samples obtained by the preliminary measurement sampling. The average measurement value may be obtained based on the measurement value and the measurement value of the main measurement sample number obtained by the main measurement sampling. In the latter case, when the average measurement value is obtained based on the measurement value of the preliminary measurement sampling and the measurement value of the main measurement sampling, the preliminary measurement sampling is performed when the main measurement sampling rate is smaller than the preliminary measurement sampling rate. The average measurement value may be obtained by reducing the number of preliminary measurement samples so that the rate becomes equal to the main measurement sampling rate. By doing so, the calculation processing time of the average measurement value can be shortened.

  As an aspect of reducing the number of preliminary measurement samples so that the preliminary measurement sampling rate is equal to the main measurement sampling rate, for example, the preliminary measurement is performed so that the preliminary measurement sampling rate is equal to the main measurement sampling rate. A mode in which the number of preliminary measurement samples is reduced by randomly extracting the measurement value of the number of samples, or the measurement value of the preliminary measurement sample number is set in advance so that the preliminary measurement sampling rate is equal to the main measurement sampling rate. The aspect which reduces the said number of preliminary measurement samples by extracting for every sample number of can be mentioned.

  Examples of the measurement sensor include a moisture sensor that measures the moisture content of the grain and a sensor that measures the protein content of the grain. When the measurement sensor is a moisture sensor, the moisture sensor includes, for example, a pair of electrode rollers, and detects the electrical resistance value between the electrode rollers while crushing the grain between the electrode rollers. The electrical resistance value may be output as information on the moisture content of the grain.

  In addition, when the said measurement sensor is a moisture sensor which measures the moisture content of a grain, it is not limited to it as said predetermined reference | standard variation, However, 3 (%)-5 (%) as a standard deviation of a moisture content The degree can be exemplified.

  As described above, according to the combine according to the present invention, when the variation in the measurement values obtained by the preliminary measurement sampling is small, the main measurement sampling period is made longer than the preliminary measurement sampling period, thereby the main measurement. Since the sampling rate can be made smaller than the preliminary measurement sampling rate, when measuring the properties of the grain, the loss of the grain due to the sampling is as much as possible while ensuring the reliability of the measurement value by the measurement sensor. Can be reduced.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 are a left side view, a plan view, a right side view, and a front view, respectively, of a combine that is an embodiment of the present invention. 5 is a right side view of the grain tank 13 and the discharge auger 15 in the combine 201 shown in FIGS.

  First, the overall configuration of the combine 201 will be described with reference to FIGS. In the combine 201, the machine body frame 2 is placed on the crawler type traveling device 1, and the raising / cutting unit 3 is disposed in front of the machine frame 2 so as to be movable up and down. In the raising / cutting unit 3, The grain straw is weeded by the weed board 4 projecting forward, and is caused by the tine 6 projecting from the raising case 5 erected at the rear of the weed board 4, and the raising case 5 The cutting blade 7 disposed on the rear side is trimmed from the stockholder side.

  A threshing section 12 including a handling cylinder and a processing cylinder is arranged behind the raising / cutting section 3, and a cereal carrying device 8 is disposed between the raising / cutting section 3 and the threshing section 12. Yes. Further, a feed chain 9 extends rearward from the threshing portion 12 behind the conveying device 8. The cereals harvested by the pulling / reaping unit 3 are inherited from the conveying device to the feed chain 9, and the stock chain side is conveyed backward by the feed chain 9. Thereby, the tip side of the cereal is transported into the threshing unit 12, and the threshing of the cereal is performed in the threshing unit 12.

  A waste chain 18 is disposed at the rear end of the feed chain 9, and a waste processing unit 19 including a waste cutter device, a diffusion conveyor, and the like is disposed below the rear portion of the waste chain 18. After the threshing portion 12 threshed, the cereal mash (waste) is transported from the feed chain 9 to the shed chain 18 and released to the field as it is, or cut into pieces by the mashing processing portion 19. It is released while being diffused later.

  In addition, a sorting unit 17 is disposed below the threshing unit 12, and the sorting unit 17 sorts the grain from grains, swarf and the like flowing down from the threshing unit 12. Of the grains and swarf, the sorted grain is a grain tank 13 disposed on the machine body frame 2 and is conveyed to the grain tank 13 supported by the machine body frame 2, and sawdust. Etc. are discharged outside the machine.

  The grain tank 13 is disposed on the side of the threshing unit 12, and a cab 14 is disposed in front of the grain tank 13, while a grain discharging device 15 is disposed behind and above the grain tank 13. ing. The grain discharge device 15 includes a vertical discharge auger 15 a and a horizontal discharge auger 15 b, and the vertical discharge auger 15 a is erected on the machine frame 2 behind the grain tank 13. The Glen tank 13 is configured to be pivotable laterally about the vertical discharge auger 15a, and the horizontal discharge auger 15b is configured to be pivotable in the vertical direction by a pivot fulcrum provided on the rear portion thereof. Has been.

  A screw-type discharge conveyor 16 is disposed in the front-rear direction at the inner lower portion of the grain tank 13, and one end of the discharge conveyor 16 is connected to the grain discharge device 15. Thus, after being conveyed from the grain tank 13 to the grain discharging device 15 by the grain discharging conveyor 16 in the grain tank 13, it is discharged to the outside from the front end portion of the horizontal discharging auger 15b through the vertical discharging auger 15a. .

  In the grain discharging device 15, the base side of the horizontal discharging auger 15b is pivotally attached to the upper end of the vertical discharging auger 15a so as to be vertically rotatable. An auger elevating cylinder 130, which is an elevating actuator in the combine 201, is configured to be expanded and contracted by switching of a hydraulic control valve, and is pivotally attached to a bracket 131 having one end projecting from the side surface of the vertical discharge auger 15a. The other end is pivotally attached to a bracket 132 protruding from the side surface of the horizontal discharge auger 15b. Thus, by extending and retracting the auger elevating cylinder 130, the horizontal discharge auger 15b is rotated in the vertical direction. The auger elevating cylinder 130, which is an elevating actuator in the combine 201, is a hydraulic cylinder, but may be other electric or hydraulic motors and is not limited.

  A gear 133a is fitted and fixed in the middle of the vertical discharge auger 15a, and a gear 133b fitted on a rotation shaft 134a of an auger turning motor 134 as a turning actuator is meshed with the gear 133a. Thus, by operating the auger turning motor 134, the vertical discharge auger 15a and the horizontal discharge auger 15b are integrally turned. The auger turning motor 134, which is a turning actuator in the combine 201, is an electric motor, but may be a hydraulic motor or other hydraulic cylinder, and is not limited.

  As shown in FIGS. 1 to 4, a discharge case 136 is provided at the tip of the horizontal discharge auger 15b. In the discharge case 136, a bearing portion made up of a ball bearing or the like is formed to pivotally support a lateral feed conveyor (not shown). The lower surface of the discharge case 136 is opened, and a cylindrical sleeve 137 is attached along the edge of the opening. The sleeve 137 is made of a flexible resin or the like, and the lower end of the sleeve 137 is a grain outlet 138. Thereby, the grain dropped from the lower surface of the discharge case 136 can be concentrated and discharged in the vicinity immediately below the grain discharge port 138 without being scattered around.

  FIG. 6 is a left side view showing a schematic configuration of the Glen tank 13 in the combine 201 shown in FIGS. As shown in FIG. 6, the grain tank 13 is provided with a grain supply port 13a, and a milling cylinder 80 is interposed between the grain supply port 13a and the above-described sorting section 17, As indicated by the middle arrow, the fine grains sorted in the sorting unit 17 through the whipped cylinder 80 during the harvesting operation are supplied from the grain supply port 13a into the Glen tank 13 and stored. .

  Further, the Glen tank 13 is provided with a moisture sensor mounting opening 13b on the upper left side so that a moisture sensor 35 (an example of a measurement sensor) described later can be mounted. The moisture sensor 35 is mounted in the opening 13b. After that, the opening 13b is closed by attaching the closing plate 13c with screws.

  FIG. 7 shows a schematic enlarged view in which the moisture sensor 35 portion of the Glen tank 13 shown in FIG. 6 is enlarged. FIG. 7 shows a state in which the closing plate 13c is removed. The moisture sensor 35 measures the moisture content of the grain during the harvesting operation. As shown in FIG. 7, the moisture sensor 35 can measure the moisture content of the grain supplied to the grain tank 13. It is arranged in the inside.

  More specifically, the moisture sensor 35 is disposed in the Glen tank 13 in the vicinity of the grain supply port 13a. The moisture sensor 35 includes a pair of electrode rollers 351 facing each other, and a part of the grains supplied from the grain supply port 13a flows into the pair of electrode rollers 351 between the rollers 351. (See the arrows in the figure). That is, the Glen tank 13 here is a ceiling plate 13 ′ of the Glen tank 13 as a part of the grain supplied from the whipping cylinder 80 via the grain supply port 13a is indicated by an arrow in the figure. The direction of the grain is deflected toward the moisture sensor 35 by colliding with a guide plate 13h (see also FIG. 8 and FIG. 9 to be described later) suspended so as to extend downward from the grain. Is guided to the moisture sensor 35.

  In this way, the moisture sensor 35 disposed in the Glen tank 13 can crush the grain flowing from the grain supply port 13a and measure the moisture content of the grain. More specifically, the pair of electrode rollers 35 are rotated so that the grains flowing in from the grain supply port 13a enter between the rollers, and the grains are crushed between the rotating electrode rollers 351 (in other words, Detecting the electrical resistance value of the crushed grain between the electrode rollers 351 and outputting the detected electrical resistance value as a signal (information) relating to the moisture content of the grain. And is electrically connected to a control device 100 (see FIG. 11) described later. Thereby, the signal (information) regarding the grain moisture detected by the moisture sensor 35 can be transmitted to the control device 100.

  Further, the Glen tank 13 has a discharge port 13f for discharging the measured grain after the moisture amount is measured by the moisture sensor 35, and a machine for discharging the measured grain through the discharge port 13f. A guide member 13g that leads to the outside is provided.

  FIG. 8 is a schematic cross-sectional view of the moisture sensor 35 portion of the Glen tank 13 as viewed from above, and FIG. 9 is a schematic rear view showing the moisture sensor 35 portion of the Glen tank 13. As shown in FIGS. 7 to 9, the discharge port 13f is provided below the position where the moisture sensor 35 on the left side surface of the Glen tank 13 is mounted. The guide member 13g includes a cylindrical member 131g and a receiving member 132g. In FIG. 9, the receiving member 132g is not shown.

  In this example, the cylindrical member 131g is a flexible pipe, and one end 131g ′ has a side opposite to the side where the grain of the pair of electrode rollers 351 in the moisture sensor 35 is input (that is, the grain after measurement is The other end 131g "is directed to the outside of the machine through the discharge port 13f. Thereby, the post-measurement grain after the moisture amount is measured by the moisture sensor 35 The receiving member 132g is a hopper in this example, and the inlet portion 132g ′ receives the other end 131g ″ of the pipe 131g and the outlet portion 132g ″ faces downward. The hopper 132g introduces the post-measurement grain guided by the pipe 131g into the inlet portion 132g ′, and the outlet portion 13 is supported by the support member 133g so as to face. It can be discharged in the field from the g ". In this example, the post-measurement grain is guided to the outside of the machine by the guide member 13g through the discharge port 13f, but the post-measurement grain is stored in the Glen tank 13, A switching means for selectively switching between the discharge operation for discharging to the outside of the machine is provided in the middle portion of the guide member 13g on the grain tank 13 side or between the guide member 13g and the moisture sensor 35, and the switching means and the storage operation and You may comprise so that discharge operation | movement can be switched.

  As shown in FIGS. 1, 2, and 4, the combine 201 has an auger rest 52 that stores the horizontal discharge auger 15b in the storage position. The auger rest 52 includes a receiving member 52a that receives the lateral discharge auger 15b of the grain discharging device 15 and a support member 52b that supports the receiving member 52a when the grain discharging device 15 is not used, and is configured in a substantially Y shape. In addition, an auger rest sensor 54 for detecting the lateral discharge auger 15b is disposed in the concave portion of the upper mounting portion. This sensor 54 is electrically connected to the control device 100. Thereby, a signal (information) as to whether or not the lateral discharge auger 15 b is placed on the placement portion of the auger rest 52 detected by the sensor 54 can be transmitted to the control device 100.

  FIG. 10 is a plan view of the driving operation unit in the cab 14. As shown in FIG. 10, a display device 24 is provided in the central portion of the steering handle 31 of the front column 30, various switches 25 are provided in the vicinity of the display device 24, and the backrest portion left of the driver's seat 14a is further provided. On the other hand, a harvest information switch 27 is provided, both of which are electrically connected to the control device 100 (see FIG. 11). Thereby, input signals (information) of various switches can be sent to the control device 100, and output information can be sent from the control device 100 to the display device 24.

  Next, the configuration of the control system of the combine 201 according to the present embodiment will be described with reference to FIG.

  FIG. 11 is a block diagram showing a schematic configuration of a control system of the combine 201 according to the present embodiment. As shown in FIG. 11, the combine 201 includes various sensors including the moisture sensor 35 and the augerest sensor 54 described above, various switches 25, the harvest information switch 27, and the control apparatus 100 that controls these devices. GPS device 200 is provided. The GPS device 200 receives radio waves from GPS satellites and acquires information related to the area and shape of the field where the harvesting operation is performed. The GPS device 200 is connected to the control device 100 and can transmit information related to the area and shape of the field in which the harvesting operation is performed to the control device 100.

  The control device 100 includes a central processing unit 101 (hereinafter referred to as a CPU) including control arithmetic means for executing arithmetic processing based on signals input from various sensors, switches, and the like, a control program for controlling the entire combine 201, etc. And a ROM 102 that stores predetermined data relating to arithmetic expressions and LUTs (look-up tables) to be described later, and a RAM 103 that temporarily holds data generated during the operation of the CPU 101. The CPU 101 is configured to load and execute a control program stored in the ROM 102 into the RAM 103 as necessary to operate the combine 201. The CPU 101 has a built-in clock timer. Further, the ROM 102 stores a predetermined preliminary measurement sampling period t1 and a predetermined preliminary measurement section T1 (for example, a fixed time or a fixed distance from the start of harvesting of the combine 201) used in the preliminary measurement sampling unit P1 described later. A predetermined reference variation used in the measurement sampling period setting unit P3, a predetermined number of samples m ′ used in the average measurement value calculation unit P5, and the like are recorded in advance. In the present embodiment, the predetermined reference variation is the water content standard deviation (water content standard standard deviation) σs.

  The control program causes the CPU 101 to perform preliminary measurement sampling means P1, measurement value variation calculation means P2, main measurement sampling period setting means P3, main measurement sampling means P4, average measurement value calculation means P5, and grain moisture amount display means P6. It functions as a means to include. These means P1 to P6 measure the moisture content of the grain by sampling the grain harvested during the harvesting operation by the measurement sensor 35, and harvest the whole grain based on the measured moisture content of the grain. The average moisture content can be obtained and these data can be displayed.

  That is, in the preliminary measurement sampling means P1, regarding the moisture content measurement of the grain by the moisture sensor 35, in the preliminary measurement section T1 (for example, 120 (seconds)), every preliminary measurement sampling period t1 (for example, 20 (seconds)). Preliminary measurement sampling is performed for a predetermined operating time t (for example, 5 (seconds)) (see FIG. 12A), and the grain moisture amount is based on the information on the grain moisture amount measured by the moisture sensor 35. X1 (%), X2 (%),..., Xm (%) (where m is the number of preliminary measurement samples) are obtained.

In the measured value variation calculating means P2, the average value μ (of the grain moisture amounts X1 (%), X2 (%),..., Xm (%) for each preliminary measurement sampling period t1 obtained by the preliminary measurement sampling means P1. %), And the standard deviation σ (%) of the water content is calculated using the following formula (I).

  In this measurement sampling period setting means P3, the standard deviation σ (%) of the water content obtained by the measurement value variation calculating means P2 is the standard standard deviation σs of the water content (for example, 3 (%) to 5 (%)). When it is smaller, the main measurement sampling period t2 is longer than the preliminary measurement sampling period t1 (for example, about 40 (seconds)) (see FIG. 12B). When the standard deviation σ (%) is equal to or larger than the standard standard deviation σs, the main measurement sampling period t2 is made equal to the preliminary measurement sampling period t1 (see FIG. 12C).

  In the main measurement sampling means P4, for each main measurement sampling period t2 obtained by the main measurement sampling period setting means P3, a predetermined operation time t (for example, 600 (seconds)) or one harvesting work unit (one sheet) This measurement sampling is performed until the end of the field or a certain area), and the grain moisture amount Y1 (%), Y2 (%),..., Yn (%) based on the information on the grain moisture amount measured by the moisture sensor 35 (Where n is the number of measurement samples).

  In the average measurement value calculation means P5, the grain moisture content X1 (%), X2 (%),..., Xm (%) of the number m of preliminary measurement samples obtained by the preliminary measurement sampling means P1, and the main measurement sampling means P4 The average measured value is obtained based on the grain water content Y1 (%), Y2 (%),. For example, when the main measurement sampling rate r2 is smaller than the preliminary measurement sampling rate r1, the grain moisture amount X1 (%) of the preliminary measurement sample number m is set so that the preliminary measurement sampling rate r1 is equal to the main measurement sampling rate r2. Extract X2 (%), ..., Xm (%) at random, or pre-measured sample number m of grain moisture content X1 (%), X2 (%), ..., Xm (%) By extracting every several m ′, the average measurement value can be obtained by reducing the number m of preliminary measurement samples. In addition, you may obtain | require an average water content based only on the grain water content Y1 (%) of the measurement sample number n obtained by this measurement sampling means P4, Y2 (%), ..., Yn (%).

  Here, the preliminary measurement sampling rate r1 is a value obtained by dividing the preliminary measurement sample number m by the preliminary measurement section T1, and the main measurement sampling rate r2 is obtained by sampling the main measurement sample number n by the main measurement sampling unit P4. It is a value divided by the main measurement section T2.

  In the grain moisture content display means P6, the average value, standard deviation, number of measurement points, etc. are displayed on the display device 24 for the grain moisture data obtained by means P1 to P5.

  In the control device 100 described above, the control program is executed when the combine 201 is operated, and the CPU 101 functions as the units P1 to P6.

  During the harvesting operation, when the horizontal discharge auger 15 b is placed on the placement portion of the auger rest 52, the lateral discharge auger 15 b is placed on the placement portion of the auger rest 52 by the auger rest sensor 54. In this state, when the harvest information switch 27 is pressed and the switch 27 is in the ON state, the moisture content is measured by the moisture sensor 35.

  A case where the grain moisture content is measured during the harvesting operation in the combine 201 and the average moisture content is obtained based on the obtained measurement value will be described below with reference to FIG. FIG. 13 is a flowchart showing the flow of processing when measuring the grain water content during the harvesting operation.

In measuring the grain moisture content, first, the next selection screen is displayed on the display device 24, and the setting condition of the preliminary measurement section T1 is selected (step S1).
(A) Combine harvesting time (b) Combine harvesting distance (c) Manual operation (d) GPS data

  Here, when the setting condition (a) is selected, the preliminary measurement section T1 is set to a certain time from the start of harvesting recorded in advance in the ROM 102, and when the setting condition (b) is selected, The preliminary measurement section T <b> 1 is a fixed distance from the start of harvest recorded in advance in the ROM 102. When the setting condition (c) is selected, the preliminary measurement section T1 is set as the time from the ON operation to the OFF operation of a predetermined switch among the various switches 25. Furthermore, when the setting condition of (d) is selected, the preliminary measurement section T1 becomes a trajectory of the combine 201 at the time of the harvesting operation based on the field area and shape information acquired from the GPS data from the GPS device 200 ( For example, the time from the start of harvesting of the combine 201 to the time when the outer periphery of the field is made one turn). Note that the setting conditions of the preliminary measurement section T1 are not limited to these, and any setting condition may be adopted as long as a certain correlation is obtained with respect to the harvesting work time. Here, a case where the harvesting operation time (a) is selected will be described.

  In the means P1, regarding the moisture content measurement of the grain by the moisture sensor 35, a predetermined operation is performed for each preliminary measurement sampling period t1 previously recorded in the ROM 102 in the preliminary measurement section T1 selected on the selection screen display of the display device 24. During time t, preliminary measurement sampling is performed (step S2), and based on the information on the grain moisture amount measured by the moisture sensor 35, the grain moisture amount X1 (%), X2 (%),. %) Is measured (step S3).

  Next, in the means P2, the average value μ (%) of the grain moisture amounts X1 (%), X2 (%),..., Xm (%) for each preliminary measurement sampling period t1 obtained in the means P1 is obtained. (Step S4), the standard deviation σ (%) of the water content is calculated using the formula (I) (Step S5).

  In the means P3, when the standard deviation σ (%) of the water content obtained by the means P2 is smaller than the standard standard deviation σs of the water content (Step S6), as shown in FIGS. 12B and 14A. In addition, when the main measurement sampling period t2 is longer than the preliminary measurement sampling period t1 (step S7) and is equal to or larger than the reference standard deviation σs (step S6), as shown in FIGS. 12C and 14B. In addition, the main measurement sampling period t2 is made equal to the preliminary measurement sampling period t1 (step S8).

  Further, in the means P4, the main measurement sampling is performed for a predetermined operating time t every main measurement sampling period t2 obtained by the means P3 (for example, t2> t1 when σ <σs) (step S9). Based on the information on the grain moisture amount measured by the moisture sensor 35, the grain moisture amounts Y1 (%), Y2 (%),..., Yn (%) are measured (step S10).

  And in means P5, the amount of grain moisture X1 (%), X2 (%),..., Xm (%) of the number m of preliminary measurement samples obtained in means P1, and the number of main measurement samples obtained in means P4 An average measured value is obtained based on n grain moisture amounts Y1 (%), Y2 (%),..., Yn (%) (steps S11 to S13). That is, when the main measurement sampling rate r2 is smaller than the preliminary measurement sampling rate r1, for example, the grain moisture amount X1 (%) of the preliminary measurement sample number m is set so that the preliminary measurement sampling rate r1 becomes equal to the main measurement sampling rate r2. ), X2 (%),..., Xm (%) are extracted at random, or the amount of grain moisture X1 (%), X2 (%),. The number m of preliminary measurement samples is decreased by extracting every sample number m ′ recorded in advance (step S12), and the average measurement value is calculated (step S13). For the grain moisture data obtained by the means P1 to P5, the means P6 displays the average measured value, standard deviation, number of measurement samples, etc. on the display device 24 (step S14).

  According to the combine 201 described above, when the standard deviation σ (%) of the grain moisture amounts X1 (%), X2 (%),..., Xm (%) obtained by the measured value variation calculating means P2 is small. Since the main measurement sampling rate r2 can be made smaller than the preliminary measurement sampling rate r1 by making the main measurement sampling cycle t2 longer than the preliminary measurement sampling cycle t1 by the main measurement sampling cycle setting means P3, the moisture content of the grain When measuring the amount of grain loss due to sampling as much as possible while ensuring the reliability of the measured values Y1 (%), Y2 (%), ..., Yn (%) by the moisture sensor 35 Can do.

  Further, when the main measurement sampling rate r2 is smaller than the preliminary measurement sampling rate r1, the number of preliminary measurement samples m is reduced so that the preliminary measurement sampling rate r1 becomes equal to the main measurement sampling rate r2. The time for calculating the average moisture content can be shortened.

FIG. 1 is a left side view of a combine which is an embodiment of the present invention. FIG. 2 is a plan view of the combine which is an embodiment of the present invention. FIG. 3 is a right side view of the combine which is an embodiment of the present invention. FIG. 4 is a front view of a combine which is an embodiment of the present invention. FIG. 5 is a right side view of the grain tank and the discharge auger in the combine shown in FIGS. FIG. 6 is a left side view showing a schematic configuration of the Glen tank in the combine shown in FIGS. 1 to 4. FIG. 7 is a schematic enlarged view in which the moisture sensor portion of the Glen tank shown in FIG. 6 is enlarged. FIG. 8 is a schematic cross-sectional view of the moisture sensor portion of the grain tank in the combine as viewed from above. FIG. 9 is a schematic rear view showing the moisture sensor portion of the Glen tank in the combine. FIG. 10 is a diagram of a driving operation unit in the cab viewed from a plane. FIG. 11 is a block diagram showing a schematic configuration of a combine control system according to the present embodiment. FIG. 12 is a diagram showing a timing chart of the moisture sensor when sampling the grain moisture content, and FIG. 12 (A) shows a timing chart during preliminary measurement sampling performed in the preliminary measurement section, FIG. 12B shows a timing chart at the time of the main measurement sampling performed when the standard deviation of the moisture amount is smaller than the reference standard deviation in the main measurement section, and FIG. The timing chart in the case of this measurement sampling performed when the standard deviation of a moisture content is equal to or larger than a standard standard deviation is shown. FIG. 13 is a flowchart showing the flow of processing when measuring the grain water content during the harvesting operation. FIG. 14 is a schematic diagram illustrating a sampling state in which preliminary measurement sampling and main measurement sampling are performed in a field, and FIG. 14A illustrates a sampling state in a field with a small variation in water content. (B) has shown the sampling state in the agricultural field with large variation in a moisture content.

Explanation of symbols

35 ... Measuring sensor 201 ... Combine 351 ... A pair of electrode rollers
100: Control device T1: Preliminary measurement section t1: Preliminary measurement sampling period
t2: Main measurement sampling cycle σ: Variation in measured values

Claims (10)

A combine comprising a measurement sensor for measuring the properties of the grain during the harvesting operation and a control device for controlling the measurement sensor;
The control device, regarding the measurement of grain properties by the measurement sensor, performs preliminary measurement sampling at a predetermined preliminary measurement sampling period, and obtains the main measurement sampling period based on variations in the measurement values obtained by the preliminary measurement sampling, A combine configured to perform main measurement sampling at the main measurement sampling period.   The combine according to claim 1, wherein the control device is configured to perform the preliminary measurement sampling in a predetermined preliminary measurement section.   The combine according to claim 2, wherein the preliminary measurement section is set based on a harvesting work time of the combine.   The combine according to claim 2 or 3, wherein the preliminary measurement section is set based on a harvesting work distance of the combine.   The combine according to any one of claims 2 to 4, wherein the preliminary measurement section is set by an operator's manual operation.   The control device is configured to obtain an average measurement value based on a measurement value of the number of preliminary measurement samples obtained by the preliminary measurement sampling and a measurement value of the number of main measurement samples obtained by the main measurement sampling. The combine according to any one of claims 1 to 5, wherein:   When the main measurement sampling rate obtained by dividing the main measurement sample number by the main measurement section sampled by the main measurement sampling is smaller than the preliminary measurement sampling rate by dividing the preliminary measurement sample number by the preliminary measurement section, The combine according to claim 6, wherein the average measurement value is obtained by reducing the number of preliminary measurement samples so that the preliminary measurement sampling rate is equal to the main measurement sampling rate.   The number of preliminary measurement samples is reduced by randomly extracting a measurement value of the number of preliminary measurement samples so that the preliminary measurement sampling rate becomes equal to the main measurement sampling rate. Combine.   The number of preliminary measurement samples is reduced by extracting a measurement value of the number of preliminary measurement samples every predetermined number of samples so that the preliminary measurement sampling rate becomes equal to the main measurement sampling rate. Item 8. A combine according to Item 7. The measurement sensor includes a pair of electrode rollers, detects an electrical resistance value between the electrode rollers while crushing the grain between the electrode rollers, and the detected electrical resistance value is information on the moisture content of the grain. The combine according to any one of claims 1 to 9, wherein the combiner is a moisture sensor that outputs as follows.

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