AU2021203532A1 - An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors - Google Patents
An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors Download PDFInfo
- Publication number
- AU2021203532A1 AU2021203532A1 AU2021203532A AU2021203532A AU2021203532A1 AU 2021203532 A1 AU2021203532 A1 AU 2021203532A1 AU 2021203532 A AU2021203532 A AU 2021203532A AU 2021203532 A AU2021203532 A AU 2021203532A AU 2021203532 A1 AU2021203532 A1 AU 2021203532A1
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- Australia
- Prior art keywords
- face conveyor
- shearer
- armoured face
- speed
- flow rate
- 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.)
- Abandoned
Links
- 239000003245 coal Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 25
- 238000013528 artificial neural network Methods 0.000 claims abstract description 12
- 239000000498 cooling water Substances 0.000 claims abstract description 8
- 238000005461 lubrication Methods 0.000 claims abstract description 8
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Control Of Conveyors (AREA)
Abstract
An automatic speed control method for armoured face conveyor and shearer without
coal flow rate sensors, which is characterized by its speed control steps as follows: (1)
Collect the state data of the shearer; (2) Collect the state data of the armoured face
conveyor; (3) Building an algorithm model based on an algorithm such as neural
network, and then the coal flow rate on the armoured face conveyor can be estimated
by this model according to the said collected state data, so the sensors to measure the
coal flow rate is not needed; (4) Control the speed of armoured face conveyor and the
shearer automatically with the said model.
1/1
State of shearer:
Speed, location, cutting process step, cutting current,
cutting height, etc
Shearer
Set speed of shearer
Controller
Set speed of armoured face conveyor
Armoured
Face
Conveyor
State of armoured face conveyor:
Speed, current, temperature, cooling water flow,
lubrication state, etc
FIG. 1
Description
1/1
State of shearer: Speed, location, cutting process step, cutting current, cutting height, etc Shearer
Set speed of shearer
Controller Set speed of armoured face conveyor
Armoured Face Conveyor
State of armoured face conveyor: Speed, current, temperature, cooling water flow, lubrication state, etc
FIG. 1
Technical Field
[001] The present invention pertains to an automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, and belongs to the field of coal mining automation.
Background
[002] Nowadays, large-power frequency converters have been widely applied in coal mines, and armoured face conveyor is generally driven by variable-frequency motors, which laid a foundation for speed regulation. The commonly speed control methods for the armoured face conveyor require coal flow rate sensors to measure the real-time coal flow rate, and then control the speed of the armoured face conveyor in closed-loop. However, the coal flow rate sensor is low in reliability, vulnerable in interference and high in cost, so these methods using coal flow rate sensors have been unable to gain widespread application, a large number of the armoured face conveyors with frequency converters cannot achieve speed regulation, and the frequency converters only act as soft starters, so it constitutes physical waste; moreover, for absence of speed regulation, the armoured face conveyor has to run at maximum speed constantly in order to ensure normal production, so lead to wasting of electric energy and over-wearing of machine. On the other side, if the shearer does not match the armoured face conveyor well, overload, seizure and other accidents may happen to the armoured face conveyor due to excessively high cutting speed, which seriously affects the production. Therefore, there is an urgent need of a stable and reliable automatic speed control method for the armoured face conveyor and shearer in the coal mines.
[003] Whereas the aforesaid defects exist, we, the designers, devote ourselves to creating an automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors through research and innovation to make it more valuable in industrial utilization.
Brief Description of The Invention
[004] In order to solve the aforesaid technical problems, the object of the present invention is to provide an automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors. During underground coal mining, the coal is cut down from the coal seam and is loaded on the armoured face conveyor by shearer, and then the coal is transported out by the armoured face conveyor. Therefore, the quantity of the coal on the armoured face conveyor depends on the shearer. Generally, the farther the shearer is away from the maingate, the more the coal will be on the armoured face conveyor. The higher the traction speed of shearer is, the more coal will be on the armoured face conveyor, and vice versa. Based on this principle, the present invention provides the following technical program:
[005] An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, which is the object of the present invention, comprises the following speed control steps: (1) Collect the state data of the shearer; (2) Collect the state data of the armoured face conveyor; (3) Building an algorithm model based on an algorithm such as neural network, fuzzy algorithm or optimal estimation algorithm, and then the coal flow rate on the armoured face conveyor can be estimated by this model according to the said collected state data. So, the sensors to measure the coal flow rate is not needed; (4) Control the speed of armoured face conveyor and the shearer automatically with the said model.
[006] Further, the said state data of the shearer collected in Step (1) includes the speed, location, cutting current, cutting process step and cutting height of the shearer. Further, the said state data of the armoured face conveyor collected in Step (2) includes the speed, current, temperature, cooling water flow and lubrication state of the armoured face conveyor.
[007] Further, the steps to build the model through neural network algorithm described in Step (3) include: (1) To build a three-layer neural network, the input layer has 4 units, the hidden layer has 8 units and the output layer has 2 units; (2) To control speed of armoured face conveyor manually, in the process record the real-time speed, location, cutting current, cutting process step and cutting height of the shearer, and record the corresponding speed, current, temperature, cooling water flow and lubrication state of the armoured face conveyor, and then form history data sets with these data; (3) To train the neural network with the history data sets and get the model; (4) To control the speed of the armoured face conveyor automatically with the well-trained model.
[008] Further, "To control the speed of the armoured face conveyor automatically with the well-trained model" described in Step (4) includes: (1) The coal flow rate on the armoured face conveyor is estimated by the model according to the state data collected from the shearer, and then the speed of the armoured face conveyor is controlled automatically, so that the coal flow rate on the armoured face conveyor is kept in the set scope automatically; (2) To determine the load condition of the armoured face conveyor according to the state data collected from the armoured face conveyor, and to reduce the speed of the shearer automatically to prevent the armoured face conveyor from overloading or being seized up when the load goes beyond the set scope; (3) To stop the shearer promptly when the armoured face conveyor has fault so as to avoid coal pile up; (4) To raise the speed of the shearer to improve productivity when the load of the armoured face conveyor is lower than the set scope.
[009] Further, the said method to estimate the coal flow rate may also be other algorithm such as fuzzy algorithm, automatic segmentation algorithm or optimal estimation algorithm.
[0010] By virtue of the said program, the present invention at least provides the following advantages: (1) An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, which is the object of the present invention, can achieve automatic speed control of the shearer and armoured face conveyor without using the coal flow rate sensors, so it is low in cost, high in reliability and powerful in anti-interference;
(2) An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, which is the object of the present invention, brings the role of variable-frequency energy saving of the frequency converter into play; (3) An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, which is the object of the present invention, saves the electric energy and reduces the wear of the armoured face conveyor.
[0011] The above only constitutes a brief description of the technical program of the present invention. For a better understanding of the technical approach of the present invention, reference is made to the accompanying drawing and descriptive matter in which preferred exemplary embodiment of the invention is illustrated, so that the present invention can be practiced according to this specification.
Description of The Drawing
[0012] The technical program of the embodiment of the present utility model will become clearer from the following brief description of the accompanying drawing to be used in the exemplary embodiment. It shall be understood that such drawing only illustrates a certain exemplary embodiment of the present utility model and shall not be restrictive on the broad invention, and to those skilled in the art, other relevant drawings are available according this drawing where no creative work is done.
[0013] FIG. 1 is the block diagram of the principle of an automatic speed control method of armoured face conveyor and shearer without coal flow rate sensors, which is the object of the present invention.
Way Of Embodiment Of The Invention
[0014] The way of embodiment of the present invention is described in detail below in conjunction with the accompanying drawing and exemplary embodiment. Such exemplary embodiment is merely illustrative of and not restrictive on the broad invention.
[0015] Referring to FIG. 1, in accordance with a preferred exemplary embodiment of the present invention, an automatic speed control method of armoured face conveyor and shearer without coal flow rate sensors, comprises the following speed control steps: (1) Collect the state data of the shearer, including the speed, location, cutting current, cutting process step and cutting height of the shearer; (2) Collect the speed, current, temperature, cooling water flow and lubrication state of the armoured face conveyor; (3) Building an algorithm model by neural network algorithm, and then the coal flow rate on the armoured face conveyor can be estimated by this model according to the said collected state data information.
[0016] The steps include: a. To build a three-layer neural network, the input layer has 4 units, the hidden layer has 8 units and the output layer has 2 units; b. To control speed of armoured face conveyor manually, in the process record the real-time speed, location, cutting current, cutting process step and cutting height of the shearer, and record the corresponding speed, current, temperature, cooling water flow and lubrication state of the conveyor then, and form history data sets with these data; c. To train the neural network with the history data sets and get the model; d. To control the speed of the armoured face conveyor automatically with the well-trained model, and the steps include: (1) The coal flow rate on the armoured face conveyor is estimated by the model according to the state data information collected from the shearer, and then the speed of the armoured face conveyor is controlled automatically, so that the coal flow rate on the armoured face conveyor is kept in the set scope automatically; (2) To determine the load condition of the conveyor according to the state data collected from the armoured face conveyor, and to reduce the speed of the shearer automatically to prevent the armoured face conveyor from overloading or being seized up when the load goes beyond the set scope; (3) To stop the shearer promptly when the conveyor has fault so as to avoid coal pile up; (4) To raise the speed of the shearer to improve productivity when the load of the conveyor is lower than the set scope.
[0017] Further, the said method to estimate the coal flow rate may also be other algorithm such as fuzzy algorithm, automatic segmentation algorithm or optimal estimation algorithm.
[0018] The above preferred way of embodiment is merely illustrative of and not restrictive on the broad invention, and it shall be noted that, to those skilled in the art, various adaptations and modifications can be configured without departing from the technical principle of the present invention, and such adaptations and modifications shall be deemed as protected within the scope of the appended claims of the present invention.
[0019] Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
[0020] The reference in this specification to any known matter or any prior publication is not, and should not be taken to be, an acknowledgment or admission or suggestion that the known matter or prior art publication forms part of the common general knowledge in the field to which this specification relates.
[0021] While specific examples of the invention have been described, it will be understood that the invention extends to alternative combinations of the features disclosed or evident from the disclosure provided herein.
[0022] Many and various modifications will be apparent to those skilled in the art without departing from the scope of the invention disclosed or evident from the disclosure provided herein.
Claims (5)
1. An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors, which is characterized by its speed control steps as follows: (1) Collect the state data of the shearer; (2) Collect the state data of the armoured face conveyor; (3) Building an algorithm model based on an algorithm such as neural network, and then the coal flow rate on the armoured face conveyor can be estimated by this model according to the said collected state data, so the sensors to measure the coal flow rate is not needed; (4) Control the speed of armoured face conveyor and the shearer automatically with the said model.
2. An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors in accordance with claim 1, which is characterized by, the said state data of the shearer collected in Step (1) includes the speed, location, cutting current, cutting process step and cutting height of the shearer.
3. An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors in accordance with claim 1, which is characterized by, The said state data of the armoured face conveyor collected in Step (2) includes the speed, current, temperature, cooling water flow and lubrication state of the armoured face conveyor.
4. An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors in accordance with claim 1, which is characterized by, The steps to build the model through neural network algorithm described in Step (3) include: (1) To build a three-layer neural network, the input layer has 4 units, the hidden layer has 8 units and the output layer has 2 units; (2) To control speed of armoured face conveyor manually, in the process record the real-time speed, location, cutting current, cutting process step and cutting height of the shearer, and record the corresponding speed, current, temperature, cooling water flow and lubrication state of the armoured face conveyor, and then form history data sets with these data; (3) To train the neural network with the history data sets and get the model; (4) To control the speed of the armoured face conveyor automatically with the well-trained model.
5. An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors in accordance with claim 4, which is characterized by, "To control the speed of the armoured face conveyor automatically with the well trained model" described in Step (4) includes: (1) The coal flow rate on the armoured face conveyor is estimated by the model according to the state data information collected from the shearer, and then the speed of the armoured face conveyor is controlled automatically, so that the coal flow rate on the armoured face conveyor is kept in the set scope automatically; (2) To determine the load condition of the armoured face conveyor according to the state data of the armoured face conveyor, and to reduce the speed of the shearer automatically to prevent the armoured face conveyor from overloading or being seized up when the load goes beyond the set scope; (3) To stop the shearer promptly when the conveyor has fault so as to avoid coal pile up; (4) To raise the speed of the shearer to improve productivity when the load of the armoured face conveyor is lower than the set scope.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525091.6A CN111897376A (en) | 2020-06-10 | 2020-06-10 | Automatic speed regulation method for conveyor and coal mining machine without coal flow sensor |
| CN202010525091.6 | 2020-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021203532A1 true AU2021203532A1 (en) | 2022-01-06 |
Family
ID=73206673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021203532A Abandoned AU2021203532A1 (en) | 2020-06-10 | 2021-05-31 | An automatic speed control method for armoured face conveyor and shearer without coal flow rate sensors |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111897376A (en) |
| AU (1) | AU2021203532A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4753484A (en) * | 1986-10-24 | 1988-06-28 | Stolar, Inc. | Method for remote control of a coal shearer |
| CN102108862B (en) * | 2010-12-30 | 2012-09-05 | 三一重型装备有限公司 | Coal mining equipment and roller electrical speed regulating system |
| CN103174423B (en) * | 2013-02-05 | 2015-03-04 | 中国矿业大学 | Device and method for monitoring and identifying coal rock for coal cutter in real time |
| CN106406083A (en) * | 2015-07-28 | 2017-02-15 | 曲阜师范大学 | Fuzzy control coal dressing method |
| CN106842918B (en) * | 2016-12-23 | 2019-07-16 | 中煤张家口煤矿机械有限责任公司 | A kind of calculation method of the real-time coal amount of drag conveyor |
| CN210343344U (en) * | 2019-08-30 | 2020-04-17 | 山西潞安环保能源开发股份有限公司常村煤矿 | Intelligent speed control device for load adjustment coal mining machine of mining conveyor |
| CN110967974B (en) * | 2019-12-03 | 2022-05-17 | 西安科技大学 | Coal flow balance self-adaptive control method based on rough set |
-
2020
- 2020-06-10 CN CN202010525091.6A patent/CN111897376A/en active Pending
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2021
- 2021-05-31 AU AU2021203532A patent/AU2021203532A1/en not_active Abandoned
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|---|---|
| CN111897376A (en) | 2020-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |