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CN109548465A - The autocontrol method and control system and cropper of a kind of roller variable speed - Google Patents

The autocontrol method and control system and cropper of a kind of roller variable speed Download PDF

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Publication number
CN109548465A
CN109548465A CN201910027288.4A CN201910027288A CN109548465A CN 109548465 A CN109548465 A CN 109548465A CN 201910027288 A CN201910027288 A CN 201910027288A CN 109548465 A CN109548465 A CN 109548465A
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CN
China
Prior art keywords
speed
drum rotation
rotation speed
roller
control
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Granted
Application number
CN201910027288.4A
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Chinese (zh)
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CN109548465B (en
Inventor
胡德利
黄春燕
吴涛
张义顺
刘佳
杨述庆
武小伟
白永安
秦建军
刘媛媛
张步坤
魏立梅
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Weichai Lovol Intelligent Agricultural Technology Co Ltd
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Lovol Heavy Industry Co Ltd
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Priority to CN201910027288.4A priority Critical patent/CN109548465B/en
Publication of CN109548465A publication Critical patent/CN109548465A/en
Application granted granted Critical
Publication of CN109548465B publication Critical patent/CN109548465B/en
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D41/00Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12Details of combines
    • A01D41/127Control or measuring arrangements specially adapted for combines
    • A01D41/1278Control or measuring arrangements specially adapted for combines for automatic steering

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Friction Gearing (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The present invention relates to a kind of autocontrol method of roller variable speed and control system and cropper, the autocontrol method and judges whether in the range of setting speed the following steps are included: step 1, detection drum rotation speed;If step 2, not in the range of setting speed, control signal is issued, adjusts drum rotation speed, and return step 1;If, without control, maintaining drum rotation speed in the range of setting speed.The present invention can effectively realize the automatic control to drum rotation speed by the control method, alleviate driver's working strength, reduce the driving skills requirement to driver, it is possible to prevente effectively from the influence because of driver's carelessness or driving skills to vehicle Threshing, is in drum rotation speed in reasonable working range, obtains the preferable percentage of thresh, less seed damage rate, the control method is simple, effective, securely and reliably, easily promotes and applies.

Description

The autocontrol method and control system and cropper of a kind of roller variable speed
Technical field
The present invention relates to a kind of autocontrol method of roller variable speed and control system and croppers, belong to agricultural machine Cropper technical field in tool.
Background technique
Harvest machinery is essential equipment in agricultural production, is mainly used for the farmings such as wheat, corn, rice, soybean The harvesting of object, hydraulic system are turned by taiwan cut off and landing, reel lift, unloading, Hydraulic Main clutch system and control roller The stepless roller speed change system of speed.If wherein drum rotation speed control is improper will lead to roller blocking, drum threshing is not clean, and seed is broken Broken rate is high, the failures such as cleaning loss percentage is big, and entrainment loss is big, therefore can drum rotation speed maintain a perseverance in operation process Determine to be an important parameter for judging harvest machinery performance in range.
The regulative mode of drum rotation speed at present are as follows: by adjusting electrical control operating handle after vehicle launch, make the electricity of operating valve Magnet valve is powered, and pushes corresponding valve core movement after solenoid valves, makes oil circuit in an ON state, and hydraulic oil enters stepless roller Oil cylinder changes the revolving speed of roller by controlling the stroke of stepless roller oil cylinder.Drum rotation speed is shown to display by detector In device, driver in harvesting process by the revolving speed of display come regulation handle, this stepless roller speed change system belongs to open loop System, revolving speed need driver to observe and manually control at any time, cannot achieve adjust automatically.
The crop that current stepless roller speed change system harvests as needed is different, adjusts operating valve by electrical control operating handle Solenoid valve, so that drum rotation speed is reached required revolving speed, then unclamp electric control handle, so that operating valve is cut off electric current, spool return cuts Oil-break road.Due to the leakage of hydraulic system, drum rotation speed is difficult to remain constant.In order to reduce the leakage of hydraulic system, current nothing Grade roller speed change system increases hydraulic lock dual-seal using operating valve.Due to being gap-matched between spool and valve body, because Dual-seal is carried out to system although increasing hydraulic lock in this stepless roller speed change system, due to the characteristic of hydraulic system, Can still be reduced because of the revolving speed of roller caused by leakage, institute can only delay the leakage of stepless roller speed change system in this approach, it is final and also It need to be adjusted by control crank.Therefore it is required that driver needs to pay close attention to drum rotation speed in display constantly in harvesting process, And by regulation handle come regulating rotation speed of drum, this adds increased the working strength of driver and difficulty, more likely because driving The carelessness of member causes drum rotation speed to be chronically at outside Rational Rotation Speed range, causes roller to block, Threshing is poor, seed damage The problems such as rate is high, cleaning loss percentage is big.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of autocontrol method of roller variable speed and control systems System and cropper, are designed as automatic closed-loop system by existing manually open cycle system for drum rotation speed control mode, pass through After controlling Programmable detection to system rollers revolving speed exception, enabling signal is issued automatically by coil of the controller to solenoid valve, is made Stepless roller oil cylinder makes corresponding oil-filled or state of draining the oil, and realizes that drum rotation speed increases or decreases required revolving speed, thus Realize that drum rotation speed maintains in the reasonable scope, to solve the above problems.
The technical scheme to solve the above technical problems is that a kind of autocontrol method of roller variable speed, The following steps are included:
Step 1, detection drum rotation speed, and judge whether in the range of setting speed;
If step 2, not in the range of setting speed, control signal is issued, adjusts drum rotation speed, and return step 1; If, without control, maintaining drum rotation speed in the range of setting speed.
The beneficial effects of the present invention are: the present invention can effectively realize the automatic control to drum rotation speed by the control method System, alleviates driver's working strength, reduces the driving skills requirement to driver, it is possible to prevente effectively from because driver neglects Or influence of the driving skills to vehicle Threshing, it is in drum rotation speed in reasonable working range, obtains preferable threshing Rate, less seed damage rate, the control method is simple, effective, securely and reliably, easily promotes and applies.
Based on the above technical solution, the present invention can also be improved as follows.
Further, in step 1, drum rotation speed is detected specifically: according to scheduled time interval real-time detection drum rotation speed.
Beneficial effect using above-mentioned further scheme is not need to carry out at any time to the detection of drum rotation speed, can be used The mode that the interval predetermined time is detected, this detection mode also compare closing to reality.
Further, before the step 1, further include in the range of manually adjusting drum rotation speed to setting speed, and cut The step of changing to automatic control state.
Beneficial effect using above-mentioned further scheme is needed manually before using autocontrol method of the invention It adjusts in revolving speed to the range of speeds of setting, guarantees before the present invention starts, the revolving speed of roller is in the reasonable scope, then to open Beginning carries out automatically controlling.
Further, in step 2, when the drum rotation speed of detection is not being set from being changed into the range of setting speed for the first time When in the range of revolving speed, control signal is issued at once, carries out the adjusting of first round drum rotation speed, return to step after persistently adjusting the t1 time Rapid 1;If detection drum rotation speed again not in the range of setting speed when, be spaced the △ t1 time after issue control signal, into Row second is taken turns drum rotation speed and is adjusted, and return step 1 after the t2 time is persistently adjusted;If the drum rotation speed third time of detection is not being set When in the range of revolving speed, control signal is issued after being spaced the △ t2 time, carries out the adjusting of third round drum rotation speed, when persistently adjusting t3 Between after return step 1;And so on.
Beneficial effect using above-mentioned further scheme is to be divided into the rotational speed regulation of automatic control repeatedly, each control Time can be carried out accurate control, and because adjusting is by the way that the stepless roller oil cylinder of solenoid valve control is oil-filled or realization of draining the oil , there is certain retardance, so needing to be spaced one suitable time between each adjust, specific rotational speed regulation is waited to hold Row terminates.
Further, the time persistently adjusted every time is identical, and each interval time is identical.
Beneficial effect using above-mentioned further scheme is that each regulating time and interval time can be according to croppers Type and actual use situation be adjusted, can be all identical, can also be incremented by successively or successively decrease, preferably every time All identical, relatively good operation is easily achieved, and control effect also compares.
Further, if the drum rotation speed n-th of detection is not in the range of setting speed, it is judged as that roller has event Barrier, issues alarm signal, and drum rotation speed adjusts from automatic control state and is switched to the state of manually adjusting.
Beneficial effect using above-mentioned further scheme is revolving speed not in range, in addition to be using when hydraulic system let out Leakage is outer, it is also possible to be that operation of roller itself goes wrong, how control solenoid valve and stepless roller oil cylinder without wheel in this way Revolving speed is all unable to control to reasonable range, distinguishes this two kinds of situations, it can the setting adjusting time on the basis of multiple adjust Several upper limits, at this point it is possible to which assert is roller failure, needs once reaching the number is still unable to adjust automatically OK range It sounds an alarm, interrupts and automatically control, using manually controlling, carry out shutdown inspection.
Further, when the drum rotation speed of detection is lower than the minimum of setting speed, the control signal of sending is to improve rolling The first control signal of cylinder revolving speed;When the drum rotation speed of detection is higher than the peak of setting speed, the control signal of sending is Reduce the second control signal of drum rotation speed.
Beneficial effect using above-mentioned further scheme is drum rotation speed not in the range of setting, and there are two types of situations, is needed The control to be carried out is not also identical, needs to distinguish two kinds of control signals.
The invention further relates to a kind of automatic control system of roller variable speed, including detector, controller and actuator, The detector is connect with actuator, and the drum rotation speed for detecting the revolving speed of roller and will test is transmitted to controller, institute It states controller to connect with actuator, for judging that the drum rotation speed detected whether in the range of setting speed, and issues control To actuator or without control, the actuator is connect signal processed with roller, for turning according to control signal adjustment roller Speed.
Further, the detector is according to scheduled time interval real-time detection drum rotation speed;It further include display, it is described Display is connect with detector, the drum rotation speed detected for showing detector.
Beneficial effect using above-mentioned further scheme is the additional display of setting, can show drum rotation speed, be convenient for Driver intuitively finds out revolving speed.
It further, further include electric control handle, the electric control handle is connect with actuator, is used for manual manipulation drum rotation speed; It further include control button, the control button is connect with actuator, and the control mode for switching actuator is manually or automatically.
It further, further include warning device, the warning device is connect with controller, for judging that roller is deposited in controller Alarm signal is issued in failure.
Further, the controller is also connect with the control button, and for being judged as system in controller, there are failures When by control button switch actuator control mode be manual.
Beneficial effect using above-mentioned further scheme is automatic control mode needs and manual control mode of the invention It is used together, just can achieve best effect, need directly to turn roller in the way of manually controlling before automatically controlling Speed is adjusted to optimum value, then switches to automatic control mode, driver can attentively drive cropper, and automatically control When mode is adjusted, it is possible that when the range that adjustment speed is slow, service condition is changed or originally set is incorrect, It can directly use instead to manually control and drum rotation speed is directly adjusted to desired range, then the parameter for going modification to automatically control, so After switch back into automatic control mode, if there is failure, also to use instead and manually control roller while alert It shuts down, is overhauled.
The invention further relates to a kind of cropper, the automatic control system including such as described roller variable speed.
Detailed description of the invention
Fig. 1 is the principle flow chart for manually controlling drum rotation speed in the prior art;
Fig. 2 is the principle flow chart that the present invention automatically controls drum rotation speed;
Fig. 3 is the structural schematic diagram of actuator of the present invention.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit Determine the scope of the present invention.
As shown in Figure 1, in the prior art, the adjusting of drum rotation speed be by manual condition, specifically by driver according to The revolving speed shown on display, is judged, find its no longer the suitable range of speeds when, push electric control handle, give solenoid valve Be powered, the valve core that pushes the work forward movement keeps stepless roller oil cylinder oil-filled or drains the oil, by control the stroke of stepless roller oil cylinder come Change the revolving speed of roller.This manually control mode, driver adjust electricity by the revolving speed of display in harvesting process Handle is controlled, belongs to open cycle system, revolving speed cannot achieve adjust automatically.
As shown in Fig. 2, the present invention relates to a kind of autocontrol methods of roller variable speed, comprising the following steps:
Step 1, detection drum rotation speed, and judge whether in the range of setting speed;
If step 2, not in the range of setting speed, control signal is issued, adjusts drum rotation speed, and return step 1; If, without control, maintaining drum rotation speed in the range of setting speed.
The present invention can effectively realize the automatic control to drum rotation speed by the control method, belong to closed-loop system, turn Adjust automatically may be implemented in speed, alleviates driver's working strength, reduces the driving skills requirement to driver, can be effective The influence because of driver's carelessness or driving skills to vehicle Threshing is avoided, drum rotation speed is made to be in reasonable working range It is interior, the preferable percentage of thresh is obtained, less seed damage rate, the control method is simple, effective, securely and reliably, easily promotes and applies.
Wherein, the detection of drum rotation speed is not needed to carry out at any time, the side that can be detected using the interval predetermined time Formula, this detection mode also compare closing to reality, so in step 1, detecting drum rotation speed specifically: according to the scheduled time It is spaced real-time detection drum rotation speed.
And before the step 1, further include in the range of manually adjusting drum rotation speed to setting speed, and be switched to from The step of dynamic state of a control.Before using autocontrol method of the invention, need manually adjust the speed to the revolving speed of setting In range, guarantee before present invention starting, the revolving speed of roller is in the reasonable scope, then to start to carry out automatically controlling.Exist Under original state, by manually adjusting electric control handle, then regulating rotation speed of drum presses control button to required revolving speed, thus It is switched to automatic control by manually controlling, Fig. 2 is Automatic Control Theory flow chart of the invention.
Specifically, in step 2, when the drum rotation speed of detection is not being set from being changed into the range of setting speed for the first time When in the range of revolving speed, control signal is issued at once, carries out the adjusting of first round drum rotation speed, return to step after persistently adjusting the t1 time Rapid 1;If detection drum rotation speed again not in the range of setting speed when, be spaced the △ t1 time after issue control signal, into Row second is taken turns drum rotation speed and is adjusted, and return step 1 after the t2 time is persistently adjusted;If the drum rotation speed third time of detection is not being set When in the range of revolving speed, control signal is issued after being spaced the △ t2 time, carries out the adjusting of third round drum rotation speed, when persistently adjusting t3 Between after return step 1;And so on.
The rotational speed regulation of automatic control is divided into repeatedly by the present invention, and each control time can be carried out accurate control, And because adjusting is to have certain retardance by the way that the stepless roller oil cylinder of solenoid valve control is oil-filled or realization of draining the oil, so needing It to be spaced one suitable time between each adjust, specific rotational speed regulation execution is waited to terminate.
Each regulating time and interval time can be adjusted according to the type and actual use situation of cropper, It can be all identical, can also be incremented by successively or successively decrease, preferably every time identical, i.e. t1=t2=t3 ..., △ t1= △ t2 ..., operation relatively good in this way are easily achieved, and control effect also compares.
And there is drum rotation speed not in range, in addition to be using when hydraulic system leakage other than, it is also possible to be roller Operation itself go wrong, how to control solenoid valve without wheel in this way and stepless roller oil cylinder be all unable to control revolving speed to reasonable Range, distinguish this two kinds of situations, setting can adjust the upper limit of number on the basis of multiple adjust, once reach this time Number is still unable to adjust automatically OK range, at this point it is possible to which assert is roller failure, needs to sound an alarm, and interrupts automatic control System carries out shutdown inspection using manually controlling.Specifically, if the drum rotation speed n-th of detection is not in the range of setting speed When, then being judged as roller, there are failures, issue alarm signal, drum rotation speed adjusting is switched to from automatic control state to be manually adjusted State.Wherein, N is preferably 5 times.
Drum rotation speed is not in the range of setting, and there are two types of situations, and the control for needing to carry out is not also identical, needs to distinguish two Kind control signal, specifically: when the drum rotation speed of detection is lower than the minimum of setting speed, the control signal of sending is to improve The first control signal of drum rotation speed;When the drum rotation speed of detection is higher than the peak of setting speed, the control signal of sending For the second control signal for reducing drum rotation speed.
The invention further relates to a kind of automatic control system of roller variable speed, including detector, controller and actuator, The detector is connect with actuator, and the drum rotation speed for detecting the revolving speed of roller and will test is transmitted to controller, institute It states controller to connect with actuator, for judging that the drum rotation speed detected whether in the range of setting speed, and issues control To actuator or without control, the actuator is connect signal processed with roller, for turning according to control signal adjustment roller Speed.
The detector is according to scheduled time interval real-time detection drum rotation speed;It further include display, the display It is connect with detector, the drum rotation speed detected for showing detector.Additional display is arranged in the present invention, can show rolling Cylinder revolving speed, intuitively finds out revolving speed convenient for driver.
Automatic control system of the invention further includes electric control handle, and the electric control handle is connect with actuator, for manual Manipulate drum rotation speed;It further include control button, the control button is connect with actuator, for switching the control mode of actuator For manually or automatically.
Automatic control system of the invention further includes warning device, and the warning device is connect with controller, for controlling Device processed judges roller, and there are issue alarm signal when failure.
The controller is also connect with the control button, and for being judged as system in controller, there are pass through control when failure The control mode of button switching actuator processed is manual.
Automatic control mode needs of the invention are used together with manual control mode, just can achieve best effect, It before automatically controlling needs that drum rotation speed is directly adjusted to optimum value in the way of manually controlling, then switches to automatic control Mode processed, driver can attentively drive cropper, and when automatic control mode is adjusted, it is possible that adjusting speed When the range that degree is slow, service condition is changed or originally set is incorrect, it can directly use instead and manually control roller directly Revolving speed is adjusted to desired range, then the parameter for going modification to automatically control, and then switches back to automatic control mode, if there is event Barrier, also will use instead to manually control and shut down roller, be overhauled while alert.
In the present invention, detector, controller, actuator, display, electric control handle, control button, warning device etc. fill Structure and the internal relevant circuit program for setting itself are the prior art, and related function according to the present invention may be implemented Energy.Wherein, actuator includes solenoid valve, operating valve, stepless roller oil cylinder, as shown in figure 3, solenoid valve it is opposite be provided with two It is a, as shown in Y8a and Y8b in Fig. 3 (since operating valve is that combination multi-way valve controls multiple systems, roller variable speed oil cylinder this Road has been discharged to serial number 8), respectively be located in the middle operating valve and connect, A8 and B8 are respectively the hydraulic lock of operating valve two-way, are risen close Envelope effect, the spool (the nested square structure of upper end in Fig. 3) of operating valve is connected with stepless roller oil cylinder, stepless roller oil cylinder and Roller is connected, and solenoid valve receives the current signal of controller or the current signal of electric control handle, controls the fortune of work valve core It is dynamic, so that it is oil-filled or drain the oil to control stepless roller oil cylinder, the revolving speed of roller is adjusted.
The use process of automatic control system of the invention are as follows:
By detector according to the scheduled time interval real-time detection drum rotation speed of system, and it will test data and be transmitted to display Device and controller, controller pass through the difference judged between present speed and setting speed range.
When drum rotation speed is lower than the minimum of setting speed, controller opens the solenoid valve (such as Y8a) of positive direction side Streaming current value is the current signal of A1, and duration t1, the valve core that works at this time, which is pushed, opens oil circuit, stepless roller oil cylinder Oil-filled, drum rotation speed is improved, and after the t1 time, no matter whether drum rotation speed has arrived at required revolving speed, epicycle Adjusting all terminates.Detector still sends detection signal in Oil feeding process, after the first round is adjusted, if revolving speed does not reach yet In the required range of speeds, after being spaced the △ t time, opens the second wheel speed and adjust, controller is A1 to solenoid valve starting current value Current signal, duration t2, and so on.
Equally, when drum rotation speed is higher than the peak of setting speed, controller to the solenoid valve of opposite direction side (such as Y8b) the starting duration is t1 ', and current value is the current signal of A2, and the work valve core of opposite direction side, which is pushed, at this time opens Oil circuit, stepless roller oil cylinder start to drain the oil, and drum rotation speed starts to reduce, equally after the first round is adjusted, if revolving speed is not yet In the range of speeds needed for reaching, after being spaced the △ t1 time, opens the second wheel speed and adjust, and so on.
In order to improve the security performance of automatic control system, either in order to mention high-revolving positive feedback adjust or in order to The negative-feedback regu- lation for reducing revolving speed is judged as rolling if required revolving speed is still not achieved in automatic control system revolving speed after adjusting n times There are failure, system finishing automatic regulation functions to issue alarm signal, be switched to the state of manually controlling by control button for cylinder.
The invention further relates to a kind of cropper, the automatic control system including such as described roller variable speed.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (13)

1. a kind of autocontrol method of roller variable speed, which comprises the following steps:
Step 1, detection drum rotation speed, and judge whether in the range of setting speed;
If step 2, not in the range of setting speed, control signal is issued, adjusts drum rotation speed, and return step 1;If In the range of setting speed, then without control, drum rotation speed is maintained.
2. a kind of autocontrol method of roller variable speed according to claim 1, which is characterized in that in step 1, detection Drum rotation speed specifically: according to scheduled time interval real-time detection drum rotation speed.
3. a kind of autocontrol method of roller variable speed according to claim 1, which is characterized in that in the step 1 Before, further include in the range of manually adjusting drum rotation speed to setting speed, and the step of being switched to automatic control state.
4. a kind of autocontrol method of roller variable speed according to any one of the claim 1 to 3, which is characterized in that step In rapid 2, when the drum rotation speed of detection in the range of setting speed for the first time from when being changed into not in the range of setting speed, stand It carves and issues control signal, carry out the adjusting of first round drum rotation speed, persistently adjust return step 1 after the t1 time;If the roller of detection Revolving speed again not in the range of setting speed when, be spaced the △ t1 time after issue control signal, carry out second wheel drum rotation speed It adjusts, persistently adjusts return step 1 after the t2 time;If the drum rotation speed third time of detection is not in the range of setting speed, Control signal is issued after being spaced the △ t2 time, carries out the adjusting of third round drum rotation speed, persistently adjusts return step 1 after the t3 time; And so on.
5. a kind of autocontrol method of roller variable speed according to claim 4, which is characterized in that lasting every time to adjust Time it is identical, each interval time is identical.
6. a kind of autocontrol method of roller variable speed according to claim 4, which is characterized in that if the roller of detection When revolving speed n-th is not in the range of setting speed, then being judged as roller, there are failures, issue alarm signal, drum rotation speed tune Section is switched to the state of manually adjusting from automatic control state.
7. a kind of autocontrol method of roller variable speed according to claim 4, which is characterized in that when the roller of detection When revolving speed is lower than the minimum of setting speed, the control signal of sending is the first control signal for improving drum rotation speed;Work as detection Drum rotation speed be higher than setting speed peak when, the control signal of sending be reduction drum rotation speed second control signal.
8. a kind of automatic control system of roller variable speed, which is characterized in that including detector, controller and actuator, institute It states detector to connect with actuator, the drum rotation speed for detecting the revolving speed of roller and will test is transmitted to controller, described Controller is connect with actuator, for judging that the drum rotation speed detected whether in the range of setting speed, and issues control To actuator or without control, the actuator is connect signal with roller, for the revolving speed according to control signal adjustment roller.
9. a kind of automatic control system of roller variable speed according to claim 8, which is characterized in that the detector root According to scheduled time interval real-time detection drum rotation speed;It further include display, the display is connect with detector, for showing The drum rotation speed that detector detects.
10. a kind of automatic control system of roller variable speed according to claim 8 or claim 9, which is characterized in that further include electricity Handle is controlled, the electric control handle is connect with actuator, is used for manual manipulation drum rotation speed;It further include control button, the control Button is connect with actuator, and the control mode for switching actuator is manually or automatically.
11. a kind of automatic control system of roller variable speed according to claim 10, which is characterized in that further include alarm Device, the warning device are connect with controller, and for judging roller in controller, there are issue alarm signal when failure.
12. a kind of automatic control system of roller variable speed according to claim 11, which is characterized in that the controller It is also connect with the control button, for being judged as system in controller, there are switch actuator by control button when failure Control mode is manual.
13. a kind of cropper, which is characterized in that including as described in any one of claim 8 to 12 roller variable speed it is automatic Control system.
CN201910027288.4A 2019-01-11 2019-01-11 Automatic control method and system for stepless speed change of roller and harvester Active CN109548465B (en)

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US5873227A (en) * 1997-11-04 1999-02-23 Agco Corporation Combine harvester rotor speed control and control method
CN101653069A (en) * 2009-09-15 2010-02-24 江苏大学 Load feedback automatic control device for combined harvester and control method
CN102077730A (en) * 2010-12-02 2011-06-01 中国农业大学 Operating speed control system and method for combine harvester
CN102090205A (en) * 2010-12-07 2011-06-15 中国农业大学 Multi-parameter control system for threshing performance of combined harvester
CN102929146A (en) * 2012-10-24 2013-02-13 江苏大学 Device and method for realizing model reference adaptive control on operation speed of combine harvester
CN103797965A (en) * 2014-01-26 2014-05-21 洛阳理工学院 Stepless speed change hydraulic circuit of threshing cylinder of combine harvester
CN107155533A (en) * 2017-06-15 2017-09-15 农业部南京农业机械化研究所 A kind of combined harvester threshing cylinder driving control system and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873227A (en) * 1997-11-04 1999-02-23 Agco Corporation Combine harvester rotor speed control and control method
CN101653069A (en) * 2009-09-15 2010-02-24 江苏大学 Load feedback automatic control device for combined harvester and control method
CN102077730A (en) * 2010-12-02 2011-06-01 中国农业大学 Operating speed control system and method for combine harvester
CN102090205A (en) * 2010-12-07 2011-06-15 中国农业大学 Multi-parameter control system for threshing performance of combined harvester
CN102929146A (en) * 2012-10-24 2013-02-13 江苏大学 Device and method for realizing model reference adaptive control on operation speed of combine harvester
CN103797965A (en) * 2014-01-26 2014-05-21 洛阳理工学院 Stepless speed change hydraulic circuit of threshing cylinder of combine harvester
CN107155533A (en) * 2017-06-15 2017-09-15 农业部南京农业机械化研究所 A kind of combined harvester threshing cylinder driving control system and method

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