NL2024546B1 - Height profiling system and method for harvesting table of corn harvester - Google Patents

Height profiling system and method for harvesting table of corn harvester Download PDF

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Publication number
NL2024546B1
NL2024546B1 NL2024546A NL2024546A NL2024546B1 NL 2024546 B1 NL2024546 B1 NL 2024546B1 NL 2024546 A NL2024546 A NL 2024546A NL 2024546 A NL2024546 A NL 2024546A NL 2024546 B1 NL2024546 B1 NL 2024546B1
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Netherlands
Prior art keywords
profiling
lever
harvesting table
harvesting
height
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NL2024546A
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Dutch (nl)
Inventor
Shen Jingxin
Chen Gang
He Qinghai
Sun Yitian
Sun Yongjia
Li Qinglong
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Shandong Academy Agricultural Machinery Sciences
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Priority to CN201611081072.9A priority Critical patent/CN106612931A/en
Application filed by Shandong Academy Agricultural Machinery Sciences filed Critical Shandong Academy Agricultural Machinery Sciences
Priority to NL2024546A priority patent/NL2024546B1/en
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Publication of NL2024546B1 publication Critical patent/NL2024546B1/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A01D41/14—Mowing tables
    • A01D41/141—Automatic header control
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D45/00—Harvesting of standing crops
    • A01D45/02—Harvesting of standing crops of maize, i.e. kernel harvesting

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvesting Machines For Specific Crops (AREA)
  • Harvester Elements (AREA)
  • Harvesting Machines For Root Crops (AREA)

Abstract

The present invention discloses a height profiling control system for a harvesting table of a corn harvester, which is composed of a profiling detection apparatus, a harvesting table lifting hydraulic cylinder, a touch screen, a controller, an electrohydraulic proportional valve, mechanical-contact guide mechanisms, a steering hydraulic cylinder and a steering detection sensor. One end of the profiling detection apparatus is mounted at a front guard tip of a harvesting table, and the other end is connected with the harvesting table through a chain. During operation, a profiling lever contacts the ground by virtue of own gravity. The profiling lever of the profiling detection apparatus rotates synchronously with a rotating shaft of an angular displacement sensor. When the height profiling control system for the harvesting table of the corn harvester performs the height profiling operation, the profiling lever rotates around a shaft hole of a base along with the fluctuation of the ground; the angular displacement sensor feeds back a varied angle value to the controller; and the controller controls actions of the electro-hydraulic proportional valve and the harvesting table lifting hydraulic cylinder according to different angle values to realize the rising and falling of the harvesting table, thereby completing the height profiling action.

Description

HEIGHT PROFILING SYSTEM AND METHOD FOR HARVESTING TABLE OF CORN
HARVESTER Technical Field The present invention relates to agricultural machinery, and in particular to a height profiling system and height profiling method for a harvesting table of a corn harvester. Background China is a large agricultural country. Automation and intelligentization of agricultural machinery and equipment are the premise and foundation for realizing the large-scale farming of modern agriculture in China and have broad development prospects. Although China has made remarkable achievements in the mechanization of agricultural equipment, it is still at the initial stage in terms of automation and intelligentization. When the corn harvester as large-sized agricultural harvesting equipment works in the field, on one hand, a driver shall drive the machine carefully; and on the other hand, the driver shall pay close attention to the cutting height, feeding amount and working conditions of an engine, so that long-term mechanical operation may increase the fatigue of the driver and reduce the harvesting efficiency. In order to reduce the workload of the driver and improve the work efficiency, a height profiling control technology for a harvesting table of the corn harvester is researched, and the height profiling control system for the harvesting table is developed, so that the harvesting table is automatically adjusted along with the fluctuation change of the land form and is always kept at the constant ground clearance to prevent undesirable operation phenomena such as inconsistent height of stubbles, burying of the front end of the harvesting table, missing harvesting of the falling corns, etc. and realizing a height profiling function of the harvesting table. Summary In view of defects of the prior art, the present invention provides a height profiling system and height profiling method for a harvesting table of a corn harvester. By using a mechanics-electrics-hydraulic integrated control technology, the height profiling system detects a fluctuation state of ground by using a profiling detection apparatus, and controls an electro-hydraulic proportional valve of a lifting hydraulic cylinder by using a controller, thereby achieving a purpose of height profiling of the harvesting table.
To solve the technical problems, the present invention adopts the following technical solutions: a height profiling system for a harvesting table of a corn harvester includes a controller, a profiling detection apparatus for detecting a fluctuation state of the ground and an actuating mechanism for controlling the rising and falling of a lifting table. The profiling detection apparatus is mounted at a front guard tip of the harvesting table. The profiling detection apparatus includes a profiling lever rising and falling along with a land form and an angular displacement sensor rotating synchronously with the profiling lever, and the angular displacement sensor is electrically connected with the controller. The actuating mechanism includes an electro-hydraulic proportional valve and a harvesting table lifting hydraulic cylinder. The electro-hydraulic proportional valve is electrically connected with the controller. The harvesting table lifting hydraulic cylinder drives the harvesting table to rise and fall.
According to the height profiling system for the harvesting table of the corn harvester of the present invention, the profiling detection apparatus includes a base.
The base is mounted at the front guard tip of the harvesting table. The angular displacement sensor is mounted on the base. One end of the profiling lever is rotatably connected with the base, and the other end is connected with the harvesting table through a chain. A rotating pin of the angular displacement sensor is connected with the profiling lever.
According to the height profiling system for the harvesting table of the corn harvester of the present invention, one end of the profiling lever is provided with a shaft hole, the base is also provided with a same shaft hole, and the profiling lever is rotatably connected with the base through a connecting shaft penetrating through the shaft holes. The other end of the profiling lever is provided with a suspension hole, and the chain penetrates through the suspension hole to connect the profiling lever and the harvesting table. The angular displacement sensor is mounted on the base through a positioning bolt. A rotating shaft of the angular displacement sensor is inserted into a blind hole on one end of the connecting shaft and is fixedly connected with the connecting shaft through a tightening screw.
According to the height profiling system for the harvesting table of the corn harvester of the present invention, one end, having the shaft hole, of the profiling lever is also provided with a screw hole. The tightening screw fixedly connects the profiling lever and the connecting shaft through the screw hole.
According to the height profiling system for the harvesting table of the corn harvester of the present invention, the profiling lever includes three portions which are integrated. A middle portion of the profiling lever is horizontal, and both ends of the profiling lever are in a symmetric arc shape.
The height profiling system for the harvesting table of the corn harvester of the present invention further includes a touch screen for setting and displaying operation parameters. The touch screen and the controller are mounted in a cab.
According to the height profiling system for the harvesting table of the corn harvester of the present invention, the harvester lifting hydraulic cylinder is mounted below the harvesting table and is connected with a stander. The electro-hydraulic proportional valve is mounted below the cab.
The present invention further discloses a height profiling method based on the height profiling system for the harvesting table of the corn harvester. The method includes: firstly, a ground clearance value of the harvesting table is set. The profiling lever rotates around the shaft hole of the base along with the fluctuation of the ground. The angular displacement sensor feeds back the varied angle value to the controller.
The controller controls the actions of the electro-hydraulic proportional valve and the harvesting table lifting hydraulic cylinder according to different angle values to realize the rising and falling of the harvesting table.
According to the height profiling method of the present invention, in order to avoid the up-down jittering of the harvesting table on a position due to an inertial effect when reaching the set height value, an upper limit and a lower limit of the angle value are set by taking the ground clearance value of the harvesting table as a reference. When the angle value detected by the angular displacement sensor is in the range of the upper limit and the lower limit, the lifting hydraulic cylinder does not act. When the angle value detected by the angular displacement sensor is greater than an upper limit value, the lifting hydraulic cylinder retracts, and the harvesting table falls. When the angle value detected by the angular displacement sensor is less than a lower limit value, the lifting hydraulic cylinder extends out, and the harvesting table rises.
The beneficial effects of the present invention are: the present invention is provided with the profiling detection apparatus. The profiling detection apparatus consists of the profiling lever and the angular displacement sensor. One end of the profiling lever is connected with the angular displacement sensor, and the other end is a movable end. The fluctuation change of the ground is converted to the change of the angle of the angular displacement sensor through the profiling lever. The controller controls the action of the electro-hydraulic proportional valve according to a signal fed back by the profiling detection apparatus to realize the extension and retraction of the harvesting table lifting hydraulic cylinder, thereby achieving a purpose of height profiling of the harvesting table, so that the harvesting table is automatically adjusted along with the fluctuation change of the land form and is always kept at the constant ground clearance to prevent undesirable operation phenomena such as inconsistent height of stubbles, burying of the front end of the harvesting table, missing harvesting of the falling corns, etc. The profiling detection apparatus of the present invention is high in response speed to the change of the land form, good in profiling effect and accurate in results. Description of Drawings Fig. 1 is a structural schematic diagram of a height profiling system for a harvesting table of a corn harvester in the present invention; Fig. 2 is a structural schematic diagram of a profiling detection apparatus; Fig. 3 is a structural schematic diagram of a profiling lever; and Fig. 4 is a flow chart of a height profiling method for a harvesting table of a corn harvester.
In the figures: 1, profiling detection apparatus, 2, lifting hydraulic cylinder, 3 touch screen, 4, controller, 5 electro-hydraulic proportional valve, 11, base, 12, sensor positioning bolt, 13, mounting bolt, 14, profiling lever, 15, angular displacement sensor, 16, connecting shaft, 17, sensor guard plate, 18, shaft hole, 19, screw hole, and 20, suspension hole.
Detailed Description The present invention is further described below in combination with the drawings and embodiments.
As shown in Fig. 1, a height profiling system for a corn harvester in the present invention includes a profiling detection apparatus 1, a harvesting table lifting hydraulic cylinder 2, a touch screen 3, a controller 4, and an electro-hydraulic proportional valve
5. One end of the profiling detection apparatus 1 is mounted at a front guard tip of the harvesting table, and the other end is connected with the harvesting table through a chain. During operation, a profiling lever contacts the ground by virtue of own gravity. The harvester lifting hydraulic cylinder 2 is mounted below the harvesting table and is connected with a stander. The touch screen 3 and the controller 4 are mounted in a cab. Operation parameters are set and displayed through the touch screen 3. The controller 4 controls an actuating mechanism to complete a profiling action. The electro-
hydraulic proportional valve 5 is mounted below the cab and controls the action of the harvesting table lifting hydraulic cylinder 2.
As shown in Fig. 2, the profiling detection apparatus 1 includes a base 11, a sensor positioning bolt 12, a mounting bolt 13, a profiling lever 14, an angular displacement 5 sensor 15, a connecting shaft 16, a sensor guard plate 17, a shaft hole 18, a screw hole 19 and a suspension hole 20. The base 11 is fixed at the front guard tip of the harvesting table through the mounting bolt 13. Two shaft holes in the connecting shaft 16 and the base 11 are in clearance fit through a shaft sleeve. As shown in Fig. 3, one end of the profiling lever 14 is provided with the shaft hole 18 and the screw hole 19. The profiling lever 14 is connected with the base 11 through the connecting shaft 16 penetrating through the shaft hole 18. A tightening screw fixedly connects the profiling lever 14 and the connecting shaft 16 penetrating through the shaft hole 18 through the screw hole 19. The other end of the profiling lever 14 is provided with the suspension hole 20. A chain penetrates through the suspension hole 20 to connect the profiling lever 14 and the harvesting table. A length of the chain can ensure the rotation of the profiling lever 14 in a given angle range. During operation, the profiling lever 14 contacts the ground by virtue of own gravity. The angular displacement sensor 15 is mounted on the base 11 through the sensor positioning bolt 12. A rotating shaft of the angular displacement sensor 15 is inserted into a blind hole on one end of the connecting shaft 16 and is fixedly connected with the connecting shaft 16 through the tightening screw. The connecting shaft 16 connects the profiling lever 14 and the rotating shaft of the angular displacement sensor 15, and the profiling lever 14 rotates synchronously with the rotating shaft of the angular displacement sensor 15. The present embodiment also discloses a height profiling method for a harvesting table of a corn harvester. The method includes: when the corn harvester performs the height profiling operation, a ground clearance value of the harvesting table is firstly set. When the harvesting table works normally, the lifting hydraulic cylinder 2 does not act. When the ground fluctuates, the profiling lever 14 rotates around the shaft hole of the base 11 along with the fluctuation of the ground; the angular displacement sensor 15 feeds back a varied angle value to the controller 4; and the controller 4 judges a range of the angle value and controls the actions of the electro-hydraulic proportional valve 5 and the harvesting table lifting hydraulic cylinder 2 according to different angle values to realize the rising and falling of the harvesting table. The range of the angle value is set by taking the ground clearance value of the harvesting table as a reference. An upper limit and a lower limit are set on the reference value. The rising and falling action of the harvesting table has inertia. When reaching a set height value, the harvesting table may jitter up and down at the position of the value due to the inertial effect. The setting of the upper limit and the lower limit avoids the occurrence of jittering phenomenon. After the upper limit and the lower limit of the angle value are set, the controller 4 judges an angle value. When the angle value detected by the angular displacement sensor 15 is in the range of the upper limit and the lower limit, the lifting hydraulic cylinder 2 does not act. When the angle value detected by the angular displacement sensor 15 is greater than the upper limit value, the lifting hydraulic cylinder 2 retracts, and the harvesting table falls. When the angle value detected by the angular displacement sensor 15 is less than a lower limit value, the lifting hydraulic cylinder 2 extends out, and the harvesting table rises.
The specific implementation of the present invention is described above with reference to the drawings but is not intended to limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, various modifications or variations that can be made by those skilled in the art without contributing creative labor are still within the protection scope of the present invention.

Claims (9)

CONCLUSIESCONCLUSIONS 1. Een hoogteprofileringssysteem voor een oogsttafel van een maiskolvenplukker, omvattende een controller, een profileringsdetectieapparaat voor het detecteren van een fluctuatietoestand van de grond en een Activeringsmechanisme voor het regelen van het stijgen en dalen van een heftafel, waarbij het profileringsdetectieapparaat is gemonteerd aan een voorste beschermpunt van de oogsttafel, het profileringsdetectieapparaat omvat een profileringshefboom, die stijgt en daalt samen met een landvorm en een hoekverplaatsingssensor, die synchroon roteert met de profileringshefboom, en de hoekverplaatsingssensor is elektrisch verbonden met de controller; het activeringsmechanisme omvat een elektrohydraulische proportionele klep en een oogsttafel die de hydraulische cilinder opheft; de elektrohydraulische proportionele klep is elektrisch verbonden met de controller; en de hydraulische cilinder, die de oogsttafel opheft, laat de oogsttafel omhoog en omlaag gaan.A harvest table height profiling system comprising a controller, a profiling detection device for detecting a fluctuation state of the ground, and an Activation mechanism for controlling the rise and fall of a lifting table, the profiling detection device being mounted on a front guard tip of the harvesting table, the profiling detection device includes a profiling lever, which rises and falls together with a landform and an angular displacement sensor, which rotates synchronously with the profiling lever, and the angular displacement sensor is electrically connected to the controller; the actuating mechanism includes an electro-hydraulic proportional valve and a harvest table that lifts the hydraulic cylinder; the electro-hydraulic proportional valve is electrically connected to the controller; and the hydraulic cylinder, which lifts the harvest table, raises and lowers the harvest table. 2. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 1, waarbij het profileringsdetectieapparaat ook een basis omvat; de basis is gemonteerd aan de voorkant van de beschermkap van de oogsttafel, de hoekverplaatsingssensor is op de basis gemonteerd; een uiteinde van de profileringshefboom is roteerbaar verbonden met de basis en het andere uiteinde is verbonden met de oogsttafel via een ketting; en een roterende pen van de hoekverplaatsingssensor is verbonden met de profileringshefboom.The height profiling system for the harvest table of the corn header according to claim 1, wherein the profiling detection device also comprises a base; the base is mounted on the front of the harvest table guard, the angular displacement sensor is mounted on the base; one end of the profiling lever is rotatably connected to the base and the other end is connected to the harvesting table via a chain; and a rotary pin of the angular displacement sensor is connected to the profiling lever. 3. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 2, waarbij een uiteinde van de profileringshefboom is voorzien van een asgat; de basis is ook voorzien van een zelfde asgat; de profileringshefboom is roteerbaar verbonden met de basis via een verbindingsas, die door de asgaten dringt; het andere uiteinde van de profileringshefboom is voorzien van een ophanggat en de ketting dringt door het ophanggat om de profileringshefboom en de oogsttafel te verbinden; de hoekverplaatsingssensor is op de basis gemonteerd met een positioneringsbout; en een roterende as van de hoekverplaatsingssensor wordt ingebracht in een blind gat aan een uiteinde van de verbindingsas en is vast verbonden met de verbindingsas via een spanschroef.The height profiling system for the harvesting table of the corn header according to claim 2, wherein one end of the profiling lever is provided with a shaft hole; the base is also provided with the same axle hole; the profiling lever is rotatably connected to the base via a connecting shaft penetrating the shaft holes; the other end of the profiling lever is provided with a suspension hole and the chain penetrates the suspension hole to connect the profiling lever and the harvesting table; the angular displacement sensor is mounted on the base with a positioning bolt; and a rotating shaft of the angular displacement sensor is inserted into a blind hole at one end of the connecting shaft and is fixedly connected to the connecting shaft via a turnbuckle. 4. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 3, waarbij een uiteinde, dat het asgat heeft, van de profileringshefboom ook is voorzien van een schroefgat, en de spanschroef verbindt de profileringshefboom en de verbindingsas vast door het schroefgat.The height profiling system for the harvesting table of the corn header according to claim 3, wherein an end having the shaft hole of the profiling lever is also provided with a screw hole, and the turnbuckle connects the profiling lever and the connecting shaft through the screw hole. 5. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 2 of 3, waarbij de profileringshefboom uit drie delen bestaat, die geïntegreerd zijn; een middelste gedeelte van de profileringshefboom is horizontaal, en beide uiteinden van de profileringshefboom hebben een symmetrische boogvorm.The height profiling system for the harvesting table of the corn header according to claim 2 or 3, wherein the profiling lever consists of three parts, which are integrated; a middle portion of the profiling lever is horizontal, and both ends of the profiling lever have a symmetrical arc shape. 6. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 1 of 3, waarbij het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker verder een aanraakscherm heeft voor het instellen en weergeven van bedrijfsparameters; en het aanraakscherm en de controller in een cabine zijn gemonteerd.The corn header harvest table height profiling system according to claim 1 or 3, wherein the corn header harvest table height profiling system further includes a touch screen for setting and displaying operating parameters; and the touch screen and controller are mounted in a cabin. 7. Het hoogteprofileringssysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 1 of 4, waarbij de hydraulische hefcilinder van de plukmachine onder de oogsttafel is gemonteerd en is verbonden met een staander; en de elektrohydraulische proportionele klep onder de cabine is gemonteerd.The height profiling system for the harvesting table of the corn header according to claim 1 or 4, wherein the hydraulic lifting cylinder of the plucking machine is mounted below the harvesting table and connected to an upright; and the electro-hydraulic proportional valve is mounted under the cab. 8. Een hoogteprofileringswerkwijze op basis van het hoogteprofileringsysteem voor de oogsttafel van de maiskolvenplukker volgens conclusie 3, waarbij de werkwijze bestaat uit: ten eerste wordt een bodemvrijheidswaarde van de oogsttafel ingesteld; de profileringshefboom draait rond het asgat van de basis samen met de fluctuatie van de grond; de hoekverplaatsingssensor voert een gevarieerde hoekwaarde terug naar de controller; en de controller regelt de acties van de elektrohydraulische proportionele klep en de hydraulische cilinder, die de oogsttafel optilt volgens verschillende hoekwaarden om het stijgen en dalen van de oogsttafel te realiseren.A height profiling method based on the harvest table height profiling system of the corn cob picker according to claim 3, wherein the method comprises: firstly, a ground clearance value of the harvest table is set; the profiling lever rotates around the axis hole of the base along with the fluctuation of the ground; the angular displacement sensor returns a varied angular value to the controller; and the controller controls the actions of the electro-hydraulic proportional valve and the hydraulic cylinder, which lifts the harvesting table according to different angle values to realize the rising and falling of the harvesting table. 9. De hoogteprofileringswerkwijze volgens conclusie 8, waarbij een bovengrens en een ondergrens van de hoekwaarde worden ingesteld door de bodemvrijheidswaarde van de oogsttafel als referentie te nemen; wanneer de hoekwaarde, die gedetecteerd wordt door de hoekverplaatsingssensor binnen het bereik van de bovengrens en de ondergrens is, werkt de hydraulische hefcilinder niet; wanneer de hoekwaarde, die gedetecteerd wordt door de hoekverplaatsingssensor groter is dan een bovenste grenswaarde, trekt de hydraulische hefcilinder zich terug en daalt de oogsttafel; en wanneer de hoekwaarde, die gedetecteerd wordt door de hoekverplaatsingssensor minder is dan een ondergrenswaarde, steekt de hydraulische hefcilinder uit en stijgt de oogsttafel.The height profiling method according to claim 8, wherein an upper limit and a lower limit of the angle value are set by taking the ground clearance value of the harvesting table as a reference; when the angle value detected by the angular displacement sensor is within the range of the upper limit and the lower limit, the hydraulic lifting cylinder does not operate; when the angle value detected by the angular displacement sensor is greater than an upper limit value, the hydraulic lifting cylinder retracts and the harvesting table lowers; and when the angle value detected by the angular displacement sensor is less than a lower limit value, the hydraulic lifting cylinder protrudes and the harvesting table rises.
NL2024546A 2016-11-30 2019-12-20 Height profiling system and method for harvesting table of corn harvester NL2024546B1 (en)

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CN201611081072.9A CN106612931A (en) 2016-11-30 2016-11-30 High copying system and method for harvesting table of maize harvesting machine
NL2024546A NL2024546B1 (en) 2016-11-30 2019-12-20 Height profiling system and method for harvesting table of corn harvester

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CN201611081072.9A CN106612931A (en) 2016-11-30 2016-11-30 High copying system and method for harvesting table of maize harvesting machine
NL2024546A NL2024546B1 (en) 2016-11-30 2019-12-20 Height profiling system and method for harvesting table of corn harvester

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CN113966667A (en) * 2021-12-24 2022-01-25 潍柴雷沃重工股份有限公司 Harvester header self-adaptive control system based on ground profiling and harvester

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