CN107988879B - Control method and driving device for stopping and starting paver - Google Patents
Control method and driving device for stopping and starting paver Download PDFInfo
- Publication number
- CN107988879B CN107988879B CN201711192073.5A CN201711192073A CN107988879B CN 107988879 B CN107988879 B CN 107988879B CN 201711192073 A CN201711192073 A CN 201711192073A CN 107988879 B CN107988879 B CN 107988879B
- Authority
- CN
- China
- Prior art keywords
- electromagnet
- potentiometer
- switch
- paver
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a control method and a driving device for stopping and starting a paver, which comprise a controller, a display, a potentiometer, a switch and an electromagnet, wherein the display, the potentiometer, the switch and the electromagnet are respectively connected with the controller; the potentiometer comprises a speed regulating potentiometer and a steering potentiometer, the switch comprises a main switch and a paving/driving gear switching switch, and the electromagnet comprises a left-forward electromagnet, a left-backward electromagnet, a right-forward electromagnet and a right-backward electromagnet; the controller is used for detecting input signals of the potentiometer and the switch, and after receiving the input signals of the potentiometer and the switch, the controller outputs control signals of the left advancing electromagnet, the left retreating electromagnet, the right advancing electromagnet and the right retreating electromagnet respectively. The driving device is simple and convenient to operate and high in reliability, new equipment is not needed to be added in the original system, and only parameters are needed to be adjusted; in the construction process, the paving quality can be effectively improved, the adaptability of the paver to various working conditions is improved, and the method has good social and economic benefits.
Description
Technical Field
The invention relates to a control method and a driving device for stopping and starting a paver, and belongs to the field of paver equipment.
Background
The asphalt concrete paver is core equipment for paving high-grade pavements, and has important influence on pavement construction quality. Flatness is an important parameter for evaluating the use quality of a high-grade highway, and is an important link in pavement construction control. In the working process of the paver, when the paver starts and stops, the paver is controlled through a set of PID parameters, so that the acceleration and deceleration are too fast in the starting and stopping processes, the posture of the paver can be changed, and the paved pavement has obvious indentation and lifting phenomena. Along with the rapid development of highway construction, the requirement on road surface flatness is also continuously improved, so that the method for stopping and starting the paver is necessary to be studied deeply.
The control device for stopping and starting the paver has a plurality of factors affecting the performance, including a series of factors such as paving speed, paving width, paving thickness, paving materials and the like, and at present, the control device is controlled only by means of one set of parameters, and has the defects of poor adaptability, difficult parameter modification and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a control method and a driving device for stopping and starting a paver, which improve the construction quality of the paver and the adaptability to different working conditions.
In order to achieve the aim, the driving device for stopping and starting the paver comprises a controller, and a display, a potentiometer, a switch and a plurality of electromagnets which are respectively connected with the controller, wherein the display, the switch and the controller are respectively connected with a power supply;
the potentiometer comprises a speed regulation potentiometer and a steering potentiometer, the switch comprises a main switch and a paving/driving gear change-over switch, and the electromagnet comprises a left advancing electromagnet, a left backing electromagnet, a right advancing electromagnet and a right backing electromagnet;
the controller is used for detecting input signals of the potentiometer and the switch, and after receiving the input signals of the potentiometer and the switch, the controller outputs control signals of the left advancing electromagnet, the left backing electromagnet, the right advancing electromagnet and the right backing electromagnet respectively;
when the input signals of the speed regulating potentiometer to the controller are different, the delay time of the output signals of the controller to the electromagnet is different.
As an improvement, the timing time is stored as a parameter inside the controller, and the display is read, displayed and modified through the CAN bus.
As an improvement, the display is provided with a set value, and the set value is one-key factory restoration setting or one-key setting is zero.
As a modification, the display is of the type one_l4_77.
As a modification, the model of the main switch is CA10-A211-600FT2.
As a modification, the paving/running range change-over switch is RWK V/K10 in type.
As a modification, the controller is of the type EPEC2024.
In addition, the invention also provides a control method for stopping and starting the paver by adopting any one of the driving devices, wherein the stopping and starting process is divided into a plurality of stages according to different positions of the potentiometer to control, and the different stages are different acceleration and deceleration control parameters.
As a further improvement, the control method specifically includes the steps of:
1) Firstly judging whether the paving/driving gear change-over switch is in a paving gear or a driving gear, if so, performing no change according to the original control, and if so, further judging whether the main switch is in a forward state;
2) If the main switch is not in the forward state, the main switch is not changed according to the original control, and if the main switch is in the forward state, whether the speed regulating potentiometer is 0 is further judged;
3) If the speed regulating potentiometer is 0, the original control is not changed, if the speed regulating potentiometer is not 0, the control is performed according to the numerical value R1 of the speed regulating potentiometer, if R1 is more than 0 and less than or equal to 1000, the delay control is performed according to t1, if R1 is more than 1000 and less than or equal to 2000, the delay control is performed according to t2, if R1 is more than 2000, the delay control is performed according to t3, and the control is divided into three sections;
4) Different screed locking times are achieved according to the time differences of the speed stabilization.
The driving device is simple and convenient to operate and high in reliability, new equipment is not needed to be added in the original system, and only parameters are needed to be adjusted; in the construction process, the paving quality can be effectively improved, the adaptability of the paver to various working conditions is improved, and the method has good social and economic benefits.
The control method adopts the mutual matching of multiple parameters to realize the automatic matching of the locking time and the speed accelerating time of different paving speeds, and all the parameters can be automatically modified according to the changes of paving width, thickness and materials, so that the operation is simple and the recovery is simple.
Drawings
FIG. 1 is a schematic diagram of a driving device according to the present invention;
FIG. 2 is a control flow diagram of the present invention;
FIG. 3 is a schematic diagram of a parameter operation interface according to the present invention;
in the figure: 1. the device comprises a display, 2, a speed regulating potentiometer, 3, a steering potentiometer, 4, a main switch, 5, a paving/driving gear change-over switch, 6, a controller, 7, a left advancing electromagnet, 8, a left retreating electromagnet, 9, a right advancing electromagnet, 10 and a right retreating electromagnet.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in this description of the invention are for the purpose of describing particular embodiments only and are not intended to be limiting of the invention.
As shown in fig. 1, the driving device for stopping and starting the paver comprises a controller 6, and a display 1, a potentiometer, a switch and a plurality of electromagnets which are respectively connected with the controller 6, wherein the display 1, the switch and the controller 6 are respectively connected with a power supply;
the potentiometer comprises a speed regulating potentiometer 2 and a steering potentiometer 3, the switches comprise a main switch 4 and a paving/driving gear change-over switch 5, and the electromagnets comprise a left advancing electromagnet 7, a left retreating electromagnet 8, a right advancing electromagnet 9 and a right retreating electromagnet 10;
the controller 6 is used for detecting input signals of the potentiometer and the switch, and after receiving the input signals of the potentiometer and the switch, the controller 6 outputs control signals to the left advancing electromagnet 7, the left retreating electromagnet 8, the right advancing electromagnet 9 and the right retreating electromagnet 10 respectively;
when the input signals of the speed regulating potentiometer 2 to the controller 6 are different, the delay time of the output signals of the controller 6 to the electromagnet is different.
As an improvement of the embodiment, the timing time is stored as a parameter in the controller 6, and the display 1 is read, displayed and modified through the CAN bus, so that the operation and the use are more convenient.
As an improvement of the embodiment, the display 1 displays a set value, wherein the set value is a one-key factory setting or a one-key zero setting.
As a modification of the embodiment, the model of the display is one_l4_77; the model of the main switch 4 is CA10-A211-600FT2; the paving/driving gear change-over switch 5 is RWK V/K10; the model of the controller is EPEC2024. The performance is stable.
The driving device is simple and convenient to operate and high in reliability, new equipment is not needed to be added in the original system, and only parameters are needed to be adjusted; in the construction process, the paving quality can be effectively improved, the adaptability of the paver to various working conditions is improved, and the method has good social and economic benefits.
As shown in fig. 2, when the paver is constructed, the speed is constant under normal conditions, the speed regulating potentiometer 2 is controlled at a fixed position, the start and stop are controlled by the main switch 4, the constant speed stable construction of the paver is ensured, and the paver is controlled in a plurality of stages according to different positions of the potentiometer, and different acceleration and deceleration control parameters are controlled in different stages.
As a further improvement, as shown in fig. 2, the control method specifically includes the following steps:
1) Firstly judging whether the paving/driving gear change-over switch 5 is in a paving gear or a driving gear (whether the paving/driving gear change-over switch 5 is on, the driving gear is on, and the paving gear is off), if the paving/driving gear change-over switch 5 is in the driving gear, not changing according to the original control, and if the paving/driving gear change-over switch is in the paving gear, further judging whether the main switch 4 is in a forward state;
2) If the main switch 4 is not in the forward state, the speed regulation potentiometer 2 is not changed according to the original control, and if the main switch 4 is in the forward state, the speed regulation potentiometer 2 is further judged to be 0;
3) If the speed regulating potentiometer 2 is 0, the original control is not changed, if the speed regulating potentiometer 2 is not 0, the control is performed according to the numerical value R1 of the speed regulating potentiometer 2, if 0 is less than or equal to R1 and less than or equal to 1000, the delay control is performed according to t1, if 1000 is less than or equal to R1 and less than or equal to 2000, the delay control is performed according to t2, if R1 is more than 2000, the delay control is performed according to t3, and the control is divided into three sections;
4) Different screed locking times are achieved according to the time differences of the speed stabilization.
And different starting and stopping delays are adopted according to different speeds, so that the starting time and the stopping time are controlled in sections according to the paving speed. In addition, the starting time delay with different speeds and the locking time of different screeds are automatically matched, and meanwhile, delta t can be increased on the basis of the time, and modification can be carried out on a display.
The control method adopts the mutual matching of multiple parameters to realize the automatic matching of the locking time and the speed accelerating time of different paving speeds, and all the parameters can be automatically modified according to the changes of paving width, thickness and materials, so that the operation is simple and the recovery is simple.
The use process, in combination with fig. 3, is as follows:
1) Entering a parameter calibration page, moving selected parameters through left, right, upper and lower (corresponding to F3, F2, F6 and F7), increasing or decreasing corresponding parameters through "∈and" ∈keys at the lower end, and then determining change by pressing "F8" and "OK" or canceling change by pressing an "ESC" key;
in addition, by pressing the F4 key, the default parameter setting of factory restoration can be realized by one key;
2) The parameters can be changed only by changing the program on site originally, the method does not need to change the program, personnel can directly adjust the parameters through a display, the parameters can be adjusted according to the needs when the paver paves different materials and different widths, and the parameters can be restored to factory setting parameters by one key if the parameters are adjusted randomly.
If the waiting time is long when paving asphalt materials, the asphalt materials have relatively low temperature, the locking delay time is required to be prolonged, and the locking delay time can be changed to a required value by site operators and service personnel through the interface.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The driving device for stopping and starting of the paver is characterized by comprising a controller (6), and a display (1), a potentiometer, a switch and a plurality of electromagnets which are respectively connected with the controller (6), wherein the display (1), the switch and the controller (6) are respectively connected with a power supply;
the potentiometer comprises a speed regulation potentiometer (2) and a steering potentiometer (3), the switch comprises a main switch (4) and a paving/driving gear change-over switch (5), and the electromagnets comprise a left advancing electromagnet (7), a left retreating electromagnet (8), a right advancing electromagnet (9) and a right retreating electromagnet (10);
the controller (6) is used for detecting input signals of the potentiometer and the switch, and after receiving the input signals of the potentiometer and the switch, the controller (6) outputs control signals to the left advancing electromagnet (7), the left retreating electromagnet (8), the right advancing electromagnet (9) and the right retreating electromagnet (10) respectively;
when the paver is stopped and started, the delay time of the output signal of the controller (6) to the electromagnet is different according to the difference of the input signal of the speed regulating potentiometer (2) to the controller (6).
2. A driving device for stopping and starting a paver according to claim 1, characterized in that the time of the timer is stored as a parameter in the controller (6), and the display (1) is read, displayed and modified by means of a CAN bus.
3. A driving device for stopping and starting a paver according to claim 1, characterized in that the display (1) is provided with a set value, which is a one-key factory-restoration setting or a one-key setting to zero.
4. A drive for stopping and starting a paver as in claim 1 wherein said display is of the type one_l4_77.
5. A driving device for stopping and starting a paver according to claim 1, characterized in that the main switch (4) is of the type CA10-a211-600FT2 and the paving/driving-gear change-over switch (5) is of the type RWK V/K10.
6. A drive for stopping and starting a paver as in claim 1 wherein said controller is of the type EPEC2024.
7. A method for controlling the stopping and starting of a paver by using the driving apparatus for stopping and starting of a paver according to any one of claims 1-6, characterized in that the stopping and starting process is controlled in a plurality of stages according to different positions of a potentiometer, and the different stages are different acceleration and deceleration control parameters.
8. The method for controlling the stopping and starting of the paver according to claim 7, which is characterized by comprising the following steps:
1) Firstly judging whether the paving/driving gear change-over switch (5) is in a paving gear or a driving gear, if the paving/driving gear change-over switch is in the driving gear, not changing according to the original control, and if the paving/driving gear change-over switch is in the paving gear, further judging whether the main switch (4) is in a forward state;
2) If the main switch (4) is not in the forward state, the main switch is not changed according to the original control, and if the main switch (4) is in the forward state, whether the speed regulating potentiometer (2) is 0 is further judged;
3) If the speed regulating potentiometer (2) is 0, the original control is not changed, if the speed regulating potentiometer (2) is not 0, the control is performed according to the numerical value R1 of the speed regulating potentiometer (2), if the speed regulating potentiometer is more than 0 and less than or equal to 1000, the delay control is performed according to t1, if the speed regulating potentiometer is more than 1000 and less than or equal to 2000, the delay control is performed according to t2, if the speed regulating potentiometer is more than 2000, the delay control is performed according to t3, and the control is divided into three sections;
4) Different screed locking times are achieved according to the time differences of the speed stabilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711192073.5A CN107988879B (en) | 2017-11-24 | 2017-11-24 | Control method and driving device for stopping and starting paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711192073.5A CN107988879B (en) | 2017-11-24 | 2017-11-24 | Control method and driving device for stopping and starting paver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107988879A CN107988879A (en) | 2018-05-04 |
| CN107988879B true CN107988879B (en) | 2023-06-02 |
Family
ID=62033173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711192073.5A Active CN107988879B (en) | 2017-11-24 | 2017-11-24 | Control method and driving device for stopping and starting paver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107988879B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09296410A (en) * | 1996-04-30 | 1997-11-18 | Sumitomo Constr Mach Co Ltd | Travel controlling apparatus for asphalt finisher |
| US6196640B1 (en) * | 1997-06-11 | 2001-03-06 | Wabco Gmbh | Method for coordinating braking forces between connected units of a vehicle train |
| CN1580409A (en) * | 2003-08-14 | 2005-02-16 | 天津市正罡科技有限公司 | Intelligent control system for paving machine |
| JP2006009272A (en) * | 2004-06-22 | 2006-01-12 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Travel drive unit of wheel-traveling type asphalt finisher |
| CN200961088Y (en) * | 2006-10-11 | 2007-10-17 | 西子奥的斯电梯有限公司 | Time delay band brake control system for electromagnetic brake |
| JP2009051656A (en) * | 2007-08-29 | 2009-03-12 | Mitsubishi Electric Corp | Elevator control device |
| CN102677576A (en) * | 2012-05-16 | 2012-09-19 | 徐工集团工程机械股份有限公司科技分公司 | Leveling control method for pavement stopping/running of paver |
| CN103303288A (en) * | 2012-03-07 | 2013-09-18 | 南车青岛四方机车车辆股份有限公司 | High speed train braking system and braking method thereof |
| JP2014129695A (en) * | 2012-12-28 | 2014-07-10 | Sumitomo (Shi) Construction Machinery Co Ltd | Generator control device and generator control method in road paving machine |
| JP2014145403A (en) * | 2013-01-28 | 2014-08-14 | Iseki & Co Ltd | Multistage transmission travel transmission device for work vehicle |
| CN205620761U (en) * | 2016-01-07 | 2016-10-05 | 山东临工工程机械有限公司 | Road roller is with electric start -stop interlocking gear |
| CN205856982U (en) * | 2016-06-08 | 2017-01-04 | 宿迁学院 | Intelligent control system for paving machine |
| CN106592388A (en) * | 2016-12-16 | 2017-04-26 | 中联重科股份有限公司 | Vibration adjusting device, system and method of paver and paver |
-
2017
- 2017-11-24 CN CN201711192073.5A patent/CN107988879B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09296410A (en) * | 1996-04-30 | 1997-11-18 | Sumitomo Constr Mach Co Ltd | Travel controlling apparatus for asphalt finisher |
| US6196640B1 (en) * | 1997-06-11 | 2001-03-06 | Wabco Gmbh | Method for coordinating braking forces between connected units of a vehicle train |
| CN1580409A (en) * | 2003-08-14 | 2005-02-16 | 天津市正罡科技有限公司 | Intelligent control system for paving machine |
| JP2006009272A (en) * | 2004-06-22 | 2006-01-12 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Travel drive unit of wheel-traveling type asphalt finisher |
| CN200961088Y (en) * | 2006-10-11 | 2007-10-17 | 西子奥的斯电梯有限公司 | Time delay band brake control system for electromagnetic brake |
| JP2009051656A (en) * | 2007-08-29 | 2009-03-12 | Mitsubishi Electric Corp | Elevator control device |
| CN103303288A (en) * | 2012-03-07 | 2013-09-18 | 南车青岛四方机车车辆股份有限公司 | High speed train braking system and braking method thereof |
| CN102677576A (en) * | 2012-05-16 | 2012-09-19 | 徐工集团工程机械股份有限公司科技分公司 | Leveling control method for pavement stopping/running of paver |
| JP2014129695A (en) * | 2012-12-28 | 2014-07-10 | Sumitomo (Shi) Construction Machinery Co Ltd | Generator control device and generator control method in road paving machine |
| JP2014145403A (en) * | 2013-01-28 | 2014-08-14 | Iseki & Co Ltd | Multistage transmission travel transmission device for work vehicle |
| CN205620761U (en) * | 2016-01-07 | 2016-10-05 | 山东临工工程机械有限公司 | Road roller is with electric start -stop interlocking gear |
| CN205856982U (en) * | 2016-06-08 | 2017-01-04 | 宿迁学院 | Intelligent control system for paving machine |
| CN106592388A (en) * | 2016-12-16 | 2017-04-26 | 中联重科股份有限公司 | Vibration adjusting device, system and method of paver and paver |
Non-Patent Citations (5)
| Title |
|---|
| Guanghua Nie等.Research of the paver starting pressure.Applied Mechanics and Materials.2014,第341-342卷(第341-342期),451-455. * |
| 姚玉刚 ; 王传军 ; .高速公路沥青路面摊铺的分析与探讨.筑路机械与施工机械化.2011,(第03期),50-52. * |
| 张德先 ; .沥青混凝土摊铺机液压行驶控制***研究.交通标准化.2007,(第04期),57-59. * |
| 张铁等.工程建设机械电器及电控***.石油大学出版社,2003,332. * |
| 朱涛 ; 陈志 ; 杨振华 ; 杨军民 ; .基于嵌入式PLC的摊铺机行驶控制***设计.建筑机械化.2011,(第05期),33-36. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107988879A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108528426A (en) | Control method and control device for hybrid electric vehicle | |
| CN107988879B (en) | Control method and driving device for stopping and starting paver | |
| RU2016119097A (en) | METHOD AND DEVICE FOR SUPPORTING A VEHICLE DRIVER, IN PARTICULAR OF AN INDUSTRIAL PURPOSE CAR | |
| CN105257796A (en) | Protection device capable of intelligently adjusting belt tension force in belt drive | |
| CA2655498A1 (en) | A process for controlling torque in a calendering system | |
| JP5422613B2 (en) | Construction machine having operation mode control unit | |
| KR101641271B1 (en) | Apparatus for setting degree of controllability for construction equipment | |
| US20140260751A1 (en) | Configurable Control For A Paving Machine | |
| EP1193106A4 (en) | Vehicle running control device and vehicle | |
| CN201818376U (en) | Paver engine rotating speed control system and paver provided with same | |
| KR101243902B1 (en) | System for controlling a traffic light | |
| CN112130522A (en) | Cloth feeding control system of cloth paving machine and cloth paving device | |
| CN207452643U (en) | A kind of control device for paver stop-start | |
| CN102999057B (en) | A kind of paver and level control method thereof and system | |
| CN203821221U (en) | Bituminous pavement construction joint preheating device | |
| CN208803344U (en) | A kind of digital hydraulic control system, screed and paver | |
| KR101277498B1 (en) | Apparatus for measuring shape of thick plate and control method thereof | |
| CN101509429B (en) | Diesel engine control system and control method | |
| CN205047763U (en) | A protection device for but, intelligent regulation belt tensioning power among belt transmission | |
| CN108824147A (en) | A kind of digital hydraulic control system, screed and paver | |
| CN201198170Y (en) | Cold feed rate adaptive control system of asphalt concrete mixing apparatus | |
| CN112676359B (en) | Method and device for preventing discharged plate blank from slipping | |
| CN103737697B (en) | The synchronous method of the upper and lower steel band of wood-based plate continuous flat press and system | |
| CN113585002B (en) | Intelligent paving system of paver | |
| KR20130064866A (en) | Apparatus for limiting speed of vehicle and methdo thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |