CN113148593B - Automatic control system and method for port bulk cargo unloading hopper flow - Google Patents
Automatic control system and method for port bulk cargo unloading hopper flow Download PDFInfo
- Publication number
- CN113148593B CN113148593B CN202110401978.9A CN202110401978A CN113148593B CN 113148593 B CN113148593 B CN 113148593B CN 202110401978 A CN202110401978 A CN 202110401978A CN 113148593 B CN113148593 B CN 113148593B
- Authority
- CN
- China
- Prior art keywords
- hopper
- flow
- time
- change
- strain
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
- B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/42—Devices for emptying otherwise than from the top using belt or chain conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/60—Loading or unloading ships
- B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0208—Control or detection relating to the transported articles
- B65G2203/0258—Weight of the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
Abstract
The invention discloses a system and a method for automatically controlling the flow of a port bulk cargo unloading hopper. The strain sensor is used for measuring the strain change of the outer wall of the hopper or the supporting column, the relation between the stress and the weight of materials in the hopper is established in the dynamic strain acquisition instrument, corresponding flow information is obtained through calculation of the industrial personal computer, the flow of the hopper is automatically calibrated through the belt scale, the functions of monitoring the flow of the hopper for unloading bulk cargoes at a port and automatically calibrating the flow of the hopper can be realized, the problem that the loading and unloading operation in the loading and unloading process of bulk cargoes at the port has no control basis is solved, and the technical support is provided for the automation of loading and unloading of bulk cargoes.
Description
Technical Field
The invention relates to the technical field of port cargo handling automation, in particular to a system and a method for automatically controlling the flow of a bulk cargo unloading hopper of a port.
Background
At present, bulk cargo port loading and unloading material is generally realized by the manual control hopper of unloading, and the manual control in-process not only consumes manpower and materials, simultaneously, also can't carry out accurate estimation to the inside material weight of a plurality of hoppers of unloading and discharge flow, and the inhomogeneous problem of hopper blanking flow appears often, leads to the belt feeder to damage easily, influences equipment life and the progress of loading and unloading material.
Therefore, the technical problem to be solved by those skilled in the art is how to provide a more accurate and reliable system for automatically controlling the flow of the hopper for unloading bulk cargoes from a port with high automation degree.
Disclosure of Invention
In view of the above, the invention provides a system and a method for automatically controlling the flow of bulk cargo unloading hoppers of a port, which effectively solve the problems that the traditional manual operation mode of the unloading hoppers consumes manpower and material resources, the weight of materials and the unloading flow in a plurality of unloading hoppers cannot be accurately estimated, and the service life of equipment and the loading and unloading progress are influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the present invention provides an automatic control system for the hopper flow rate of bulk cargo ship unloading at a port, comprising:
the strain sensor is fixedly connected with the bottom of the outer wall of the hopper or a supporting column of the hopper and used for sensing strain information of the outer wall of the hopper or the supporting column of the hopper;
the dynamic strain acquisition instrument is electrically connected with the strain sensor and is used for acquiring strain information obtained by the strain sensor and processing the strain information to obtain the material quality in the hopper;
The belt metering scale is arranged at the tail end of the conveying belt below the hopper and is used for acquiring the material flow on the conveying belt;
the industrial personal computer is used for calculating the material flow of the hoppers according to the material mass in the hoppers, carrying out flow calibration on the strain sensors according to the material flow on the conveying belt, analyzing the working state of each hopper according to the material mass in the hoppers, the material flow of the hoppers and the total material flow of each hopper, generating and displaying corresponding prompt information and generating a hopper valve control instruction;
the valve controller is electrically connected with the industrial personal computer and is used for receiving the hopper valve control instruction; and
and the hopper valve is electrically connected with the valve controller and is used for receiving a hopper valve control instruction sent by the valve controller and executing corresponding opening and closing actions.
Further, the valve controller adopts a programmable logic controller. The programmable logic controller is a digital operation electronic system specially designed for automatic control in industrial environment, can accurately control a hopper valve, and improves the reliability of the system.
On the other hand, the invention also provides a method for automatically controlling the flow of the hopper for unloading bulk cargoes from the port, which comprises the following steps:
respectively carrying out weight calibration and flow calibration on the bottom of the outer wall of each hopper or a strain sensor arranged on a supporting column of the hopper;
starting the hoppers and the conveying belt, and calculating to obtain a dynamic change curve of the material quality of each hopper along with time according to the change of the measured value of the strain sensor on each hopper along with the time;
carrying out differential operation on the dynamic curve of the change of the material mass of the hopper along with the time to obtain the dynamic curve of the change of the material flow of the hopper along with the time;
comparing each numerical value in the dynamic curve of the change of the material quality of the hopper along with the time and the dynamic curve of the change of the material flow of the hopper along with the time with a corresponding preset threshold value, and analyzing to obtain the working state of each hopper;
and generating and displaying corresponding prompt information according to the working state of each hopper, generating a hopper valve control instruction, and controlling the hopper valve to execute corresponding opening and closing actions.
Further, the process of calibrating the weight of the strain sensor specifically comprises the following steps:
debugging and collecting strain and resetting the strain under the empty state of the hopper;
The method comprises the following steps of loading materials with known weight into a hopper, obtaining strain data collected by a strain sensor, and calculating to obtain a static calibration coefficient, wherein the calculation formula is as follows:
k＝m/ε
wherein k is a static calibration coefficient, m is the known weight of the material, and epsilon is strain data acquired by the strain sensor.
Further, the process of calibrating the flow rate of the strain sensor specifically includes:
adding sufficient materials into the hoppers, sequentially opening each hopper, and closing each hopper after the preset time period lasts;
calculating to obtain a change curve of the material quality of each hopper along with time according to the change of the measurement value of the strain sensor on each hopper along with the time;
obtaining a change curve of the material flow of the hopper along with time through differential operation, extracting a flow value of a stable section in the change curve of the material flow of the hopper along with time, and averaging the flow values of the stable section to obtain the average flow of the hopper;
acquiring the average flow value of the belt weigher in the preset time period;
calculating to obtain a flow calibration coefficient according to the average flow of the hopper and the average flow of the belt scale, wherein the calculation formula is as follows:
γ i ＝R i /q i
wherein, γ i For calibrating the coefficient of flow, R i Average value of flow, q, for belt scales i Is the average flow rate of the hopper.
Further, the process of analyzing and obtaining the working state of each hopper specifically comprises the following steps:
when the material quality value in the dynamic curve of the change of the material quality of the hopper along with the time is smaller than the lower-limit early warning value of the stored material of the hopper, the stored material of the hopper is analyzed to be insufficient;
when the material quality value in the dynamic curve of the change of the material quality of the hopper along with the time is larger than the upper limit early warning value of the stored material of the hopper, analyzing to obtain the overfilling of the stored material of the hopper;
when the flow value in the dynamic curve of the material flow of the hopper along with the change of time is smaller than the lower-limit early warning value of the hopper flow, the hopper flow is too low through analysis;
and when the sum of the material flow of each hopper is greater than the lower limit early warning value of the flow of the conveying belt, analyzing to obtain that the flow of the hopper is overhigh.
According to the technical scheme, compared with the prior art, the invention discloses and provides a system and a method for automatically controlling the flow of a port bulk cargo unloading hopper.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an automatic control system for the flow of a bulk cargo unloading hopper of a port, provided by the invention;
FIG. 2 is a schematic overall flow chart of a method for automatically controlling the flow of a hopper for unloading bulk cargoes from a port according to the present invention;
FIG. 3 is a schematic diagram illustrating an implementation principle of a method for automatically controlling the flow of a hopper for unloading bulk cargoes from a port according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a data curve during a flow calibration process according to an embodiment of the present invention;
fig. 5 is a dynamic curve of the change of the material mass of a first hopper with time and a dynamic curve of the change of the material flow with time when the hoppers and the conveying belt are in normal operation in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached figure 1, the embodiment of the invention discloses an automatic control system for the flow of a bulk cargo unloading hopper of a port, which comprises:
the system comprises at least one strain sensor 1, wherein the strain sensor 1 is fixedly connected with the bottom of the outer wall of a hopper 7 or a hopper supporting column 8, the strain sensor 1 is fixed in a welding mode in the embodiment, and the strain sensor 1 is used for sensing strain information of the outer wall of the hopper 1 or the hopper supporting column 8;
the dynamic strain acquisition instrument 2 is electrically connected with the strain sensor 1, and the dynamic strain acquisition instrument 2 is used for acquiring strain information obtained by the strain sensor 1 and processing the strain information to obtain the weight of the material in the hopper 7;
the belt metering scale 6 is arranged at the tail end of a conveying belt 9 below the hopper 7, and the belt metering scale 6 is used for acquiring the material flow on the conveying belt 9;
the industrial personal computer 5, the dynamic strain acquisition instrument 2 and the belt scale 6 are electrically connected with the industrial personal computer 5, the dynamic strain acquisition instrument 2 stores data on the industrial personal computer 5 for processing, the industrial personal computer 5 is used for calculating the material flow of the hopper 7 according to the weight of the material in the hopper 7, carrying out flow calibration on the strain sensor 1 according to the material flow on the conveying belt 9, analyzing the working state of each hopper 7 according to the weight of the material in the hopper 7, the material flow of the hopper 7 and the sum of the material flow of each hopper 7, specifically, comparing the weight of the material in the hopper 7 with a preset hopper capacity threshold value, comparing the material flow of the hopper 7 with a preset hopper flow threshold value, comparing the sum of the material flow of each hopper 7 with a belt conveying flow threshold value, and obtaining the working state of each hopper 7 according to the comparison result, generating and displaying corresponding prompt information and generating a hopper valve control instruction;
The device comprises a valve controller 3, an industrial personal computer 5 and a control system, wherein the valve controller 3 is electrically connected with the industrial personal computer 5, and the valve controller 3 is used for receiving a hopper valve control instruction; and
the hopper valve 4 is electrically connected with the valve controller 3, and the hopper valve 4 is used for receiving a hopper valve control instruction sent by the valve controller 3 and executing corresponding opening and closing actions, so that the actions of starting, shutting down, calibrating and the like can be realized.
Specifically, in order to improve the valve control accuracy and control reliability, the valve controller 3 in this embodiment may adopt a programmable logic controller.
On the other hand, referring to fig. 2 and fig. 3, the embodiment of the invention also discloses a method for automatically controlling the flow of a port bulk cargo unloading hopper, which comprises the following steps:
s1: and respectively carrying out weight calibration and flow calibration on the strain sensors arranged at the bottoms of the outer walls of the hoppers or on the support columns of the hoppers.
The process of weight calibration in this example is as follows:
and debugging and acquiring strain and resetting in the empty hopper state. Loading materials with known weight, such as m tons, in a hopper, measuring the strain of a strain sensor to obtain the strain epsilon, and calculating to obtain a static calibration coefficient, namely:
k＝m/ε。
the flow calibration process in this embodiment is as follows:
adding sufficient materials into the hoppers, controlling by using a control machine to open each hopper in sequence, keeping for T minutes and then closing, and controlling the opening and closing of each hopper according to the change epsilon of the measurement value of the strain sensor on each hopper along with the time i (t) calculating to obtain a change curve m of the material mass of each hopper along with time i (t)＝kε i (t)，Obtaining the ith hopper flow q through differential operation i (t)＝dm i (t)/dt, the average of the stationary phase is taken and recorded as the flow q i The average flow value of the belt scale in the time period is R i And obtaining a calibration coefficient, namely:
γ i ＝R i /q i 。
s2: starting the hoppers and the conveyor belt, and enabling the hoppers and the conveyor belt to normally run according to the change epsilon of the measured value of the strain sensor on each hopper along with the time i (t) calculating to obtain a dynamic curve of the change of the material mass of each hopper along with the time, namely M i (t)＝γ i kε i (t)。
S3: dynamic curve M of change of material quality of hopper with time i (t) performing a differential operation, namely:
Q i (t)＝dM i (t)/dt
obtaining a material flow rate change dynamic curve Q of the hopper along with the time i (t) displaying M on the industrial personal computer i (t) and Q i (t) data and curves.
S4: dynamic curve M of change of material quality of hopper with time i (t) and the material flow rate of the hopper as a function of time dynamic curve Q i And (t) comparing each numerical value with a corresponding preset threshold value, and analyzing to obtain the working state of each hopper.
S5: and generating and displaying corresponding prompt information according to the working state of each hopper, generating a hopper valve control instruction, and controlling the hopper valve to execute corresponding opening and closing actions.
In this embodiment, the specific analysis and comparison process of the working state of the hopper and the corresponding prompt information are as follows:
when the change dynamic curve M of the material quality of the hopper along with the time i (t) the mass value of the materials is less than the lower limit warning value M of the stored materials in the hopper low Prompting that the ith hopper is short of stock and is charged as soon as possible;
when the change dynamic curve M of the material quality of the hopper along with the time i (t) the mass value of the material is greater than the upper limit warning value M of the hopper material storage sup Lifting deviceShow that the ith hopper is full of material and does not need to be charged;
dynamic curve Q of material flow rate of hopper with time i (t) the medium flow value is less than the lower limit early warning value Q of the hopper flow low Prompting that the flow of the ith hopper is low and checking whether the material is blocked or not;
when the sum of the material flow rates of all the hoppers is sigma-Q i (t) is greater than the lower limit early warning value Q of the flow of the conveyor belt max The prompt is that the hopper flow is higher and the feeding speed is required to be reduced.
Referring to fig. 3, before the calibration of the strain sensors, the automatic control system for the flow of the bulk cargo ship unloading hopper of the port disclosed in this embodiment needs to be built, the strain sensors are welded and installed at the bottom of the outer wall of each hopper or on the supporting columns, a plurality of strain sensors can be installed on each hopper to ensure the measurement accuracy, and the average value of the measurements of the plurality of strain sensors is obtained as a result. And then all the strain sensors are connected with a dynamic strain acquisition instrument, and the dynamic strain acquisition instrument is connected with an industrial personal computer to realize dynamic acquisition of strain data. And then, the belt metering scale is arranged at the tail end of the conveying belt and is connected with an industrial personal computer, so that the dynamic acquisition of the flow data of the metering scale is realized. And finally, connecting the hopper gate with the programmable controller and connecting the hopper gate into the industrial personal computer to realize remote control of the action of the hopper gate, so that the system hardware is built.
After the working state of the discharge hopper is judged and prompted, whether the ship unloading is finished or not can be further judged, if the ship unloading is finished, the whole method flow is finished, and if the ship unloading is not finished, the step of collecting the hopper strain during the ship unloading operation can be returned again until the ship unloading is finished.
The following describes in detail the construction process of the above system and the implementation flow of the automatic control process of the hopper flow rate according to the present invention by a specific example with reference to fig. 3:
a port is provided with 4 coal discharge steel hoppers, each hopper can hold 80t of material, and the material is full (namely M) above 60t sup 60t), with material less than 20t being starved (i.e., M) low 20t), upper belt traffic limit of Q max ＝2800t/h(ton/hour), when the flow rate of a single hopper is lower than 10t/h, judging that the material is blocked (namely Q) low ＝10t/h)。
The process of constructing the automatic control system for the bulk cargo unloading hopper flow of the whole port and realizing the automatic control method comprises the following steps:
step one, respectively welding and installing 4 strain sensors on 4 hopper supporting columns.
And step two, connecting the 4 strain sensors with the 4 channels of dynamic strain acquisition instruments, and connecting the dynamic strain acquisition instruments with an industrial personal computer to realize dynamic acquisition of strain data.
And thirdly, mounting the belt scale at the tail end of the conveyor belt and connecting the belt scale with an industrial personal computer to realize dynamic acquisition of flow data of the belt scale.
And step four, connecting the hopper gate with the programmable controller and accessing the industrial personal computer to realize remote control of the action of the hopper gate, so that the system hardware is built.
And fifthly, calibrating the weight of the strain sensor of the hopper, debugging and collecting strain in the empty hopper state and resetting. The hopper was loaded with 60t of material and the strain sensor strain, measured 20 μ ∈, gave a static calibration factor, k, of 3.0t/μ ∈.
Step six, calibrating the flow of the strain sensor of each hopper, adding sufficient materials into the hopper, controlling by using a control machine to open each hopper in sequence, continuing for 5 minutes and then closing, and according to the change epsilon of the measured value of the strain sensor on each hopper along with the time i (t) calculating the change curve of the material mass of each hopper along with the time, namely m i (t)＝kε i (t) obtaining the flow rate q of the hopper i by differential operation i (t)＝
dm i (t)/dt, taking the first hopper as an example, as shown in FIG. 4, taking the average of the stable period (i.e. 1-4min period in FIG. 4) and recording as the flow rate, calculating as 420t/h, and the average of the flow rate after the belt metering is stable in this period (i.e. 1-4min period) is R i Obtaining a calibration coefficient gamma as 400t/h i ＝R i /q i ＝0.952。
Step seven, hopper and leatherWhen the tape unit is in normal operation, the M is displayed on the industrial personal computer i (t) and Q i (t) data and curves, the first hopper run for 10min is shown in FIG. 5, where after the 110s charge it was found that the material exceeded 60t indicating "the first hopper is full, does not charge" until the 150s material is less than 60 t. At time 490s, M is found i (t) is less than the early warning value of 20t, which prompts that the first hopper is short of material storage and is charged as soon as possible until the material exceeds 20t after the 530 th charging.
In summary, because the material in the hopper generates pressure on the hopper, the strain of the outer wall or the support column of the steel structure hopper of the hopper and the weight of the material in the hopper are in a linear corresponding relation in a working state of the hopper, based on the principle, the invention monitors the weight and the flow of the material in the hopper through dynamic strain measurement, and calibrates monitoring data according to a belt weigher, thereby realizing the automatic monitoring and calibrating functions of the flow of the bulk cargo unloading hopper at the port, and solving the problems that the traditional manual operation and control of the unloading hopper consumes manpower and material resources, the weight and the unloading flow of the material in a plurality of unloading hoppers cannot be accurately estimated, and the service life of equipment and the loading and unloading progress are influenced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method for automatically controlling the flow of a port bulk cargo ship unloading hopper is characterized by comprising the following steps:
respectively carrying out weight calibration and flow calibration on the strain sensors arranged at the bottom of the outer wall of each hopper or on a supporting column of the hopper;
Starting the hoppers and the conveying belt, and calculating to obtain a time-varying dynamic curve of the material mass of each hopper according to the time-varying measured values of the strain sensors on each hopper;
carrying out differential operation on the dynamic curve of the change of the material mass of the hopper along with the time to obtain the dynamic curve of the change of the material flow of the hopper along with the time;
comparing each numerical value in the dynamic curve of the change of the material quality of the hopper along with the time and the dynamic curve of the change of the material flow of the hopper along with the time with a corresponding preset threshold value, and analyzing to obtain the working state of each hopper;
and generating and displaying corresponding prompt information according to the working state of each hopper, generating a hopper valve control instruction, and controlling the hopper valve to execute corresponding opening and closing actions.
2. The method for automatically controlling the flow of the hopper for unloading bulk cargoes from the port according to claim 1, wherein the process of calibrating the weight of the strain sensor specifically comprises the following steps:
debugging and collecting strain and resetting in the empty state of the hopper;
and loading materials with known weight into the hopper, acquiring strain data acquired by the strain sensor, and calculating to obtain a static calibration coefficient.
3. The method as claimed in claim 2, wherein the static calibration factor is calculated by the formula:
k＝m/ε
wherein k is a static calibration coefficient, m is the known weight of the material, and epsilon is strain data acquired by the strain sensor.
4. The method for automatically controlling the flow of the hopper for unloading bulk cargoes from a port according to claim 1, wherein the process of calibrating the flow of the strain sensor specifically comprises the following steps:
adding sufficient materials into the hoppers, sequentially opening each hopper, and closing each hopper after the preset time period lasts;
calculating to obtain a change curve of the material quality of each hopper along with time according to the change of the measurement value of the strain sensor on each hopper along with the time;
obtaining a change curve of the material flow of the hopper along with time through differential operation, extracting a flow value of a stable section in the change curve of the material flow of the hopper along with time, and averaging the flow values of the stable section to obtain the average flow of the hopper;
acquiring the average flow value of the belt scale in the preset time period;
and calculating to obtain a flow calibration coefficient according to the average flow of the hopper and the average flow of the belt scale.
5. The method as claimed in claim 4, wherein the flow calibration coefficient is calculated by the following formula:
γ i ＝R i /q
wherein, gamma is i For calibrating the coefficient of flow, R i Average flow value, q, for belt scale i Is the average flow rate of the hopper.
6. The method for automatically controlling the flow of the bulk cargo ship unloading hopper at the port according to claim 1, wherein the process of analyzing and obtaining the working state of each hopper specifically comprises the following steps:
when the material quality value in the dynamic curve of the change of the material quality of the hopper along with the time is smaller than the lower-limit early warning value of the stored material of the hopper, the stored material of the hopper is analyzed to be insufficient;
when the material quality value in the dynamic curve of the change of the material quality of the hopper along with the time is larger than the upper limit early warning value of the stored material of the hopper, analyzing to obtain the overfilling of the stored material of the hopper;
when the flow value in the dynamic curve of the material flow of the hopper along with the change of time is smaller than the lower-limit early warning value of the hopper flow, the hopper flow is too low through analysis;
and when the sum of the material flow of each hopper is greater than the lower limit early warning value of the flow of the conveying belt, analyzing to obtain that the flow of the hopper is overhigh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401978.9A CN113148593B (en) | 2021-04-14 | 2021-04-14 | Automatic control system and method for port bulk cargo unloading hopper flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401978.9A CN113148593B (en) | 2021-04-14 | 2021-04-14 | Automatic control system and method for port bulk cargo unloading hopper flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113148593A CN113148593A (en) | 2021-07-23 |
| CN113148593B true CN113148593B (en) | 2022-07-29 |
Family
ID=76890579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110401978.9A Active CN113148593B (en) | 2021-04-14 | 2021-04-14 | Automatic control system and method for port bulk cargo unloading hopper flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113148593B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280101A (en) * | 2014-10-21 | 2015-01-14 | 重庆钢铁集团电子有限责任公司 | Automatic static metering system and automatic control method for continuous material unloading at dock |
| CN105314412A (en) * | 2014-07-31 | 2016-02-10 | 上海梅山钢铁股份有限公司 | Unloading flow stabilizing device for ship unloader and control method |
| CN105731095A (en) * | 2014-12-09 | 2016-07-06 | 中国中轻国际工程有限公司 | Solid hot material quantitative charging system and control method thereof |
| CN105775791A (en) * | 2016-03-17 | 2016-07-20 | 天地科技股份有限公司 | Discontinuous accumulated loading system and method for coal train loading |
| CN205932553U (en) * | 2016-08-29 | 2017-02-08 | 宁波港股份有限公司镇海港埠分公司 | Use visualization technology's bulk cargo operating system |
| CN106743338A (en) * | 2016-12-02 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of belt feeder logistics capacity monitoring system |
| CN110275465A (en) * | 2019-05-09 | 2019-09-24 | 上海海事大学 | A kind of boat-carrying data collecting instrument and its collecting method |
| CN111517127A (en) * | 2020-05-29 | 2020-08-11 | 杭州奥拓机电股份有限公司 | Dynamic and static interaction metering system and metering method |
| CN111891775A (en) * | 2020-08-25 | 2020-11-06 | 山东固润工程技术有限公司 | Intelligent loading hopper and material transferring method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389742B (en) * | 2011-08-16 | 2014-01-08 | 段爱勤 | High-precision dispensing equipment and control method thereof |
| CN102774629B (en) * | 2012-07-26 | 2015-05-20 | 中国神华能源股份有限公司 | Discharge control method and system for silo |
| US10239712B2 (en) * | 2017-06-09 | 2019-03-26 | Robert Ober & Associates, LLC | Terminal for transfer of dry, flowable, granular materials |
-
2021
- 2021-04-14 CN CN202110401978.9A patent/CN113148593B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314412A (en) * | 2014-07-31 | 2016-02-10 | 上海梅山钢铁股份有限公司 | Unloading flow stabilizing device for ship unloader and control method |
| CN104280101A (en) * | 2014-10-21 | 2015-01-14 | 重庆钢铁集团电子有限责任公司 | Automatic static metering system and automatic control method for continuous material unloading at dock |
| CN105731095A (en) * | 2014-12-09 | 2016-07-06 | 中国中轻国际工程有限公司 | Solid hot material quantitative charging system and control method thereof |
| CN105775791A (en) * | 2016-03-17 | 2016-07-20 | 天地科技股份有限公司 | Discontinuous accumulated loading system and method for coal train loading |
| CN205932553U (en) * | 2016-08-29 | 2017-02-08 | 宁波港股份有限公司镇海港埠分公司 | Use visualization technology's bulk cargo operating system |
| CN106743338A (en) * | 2016-12-02 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of belt feeder logistics capacity monitoring system |
| CN110275465A (en) * | 2019-05-09 | 2019-09-24 | 上海海事大学 | A kind of boat-carrying data collecting instrument and its collecting method |
| CN111517127A (en) * | 2020-05-29 | 2020-08-11 | 杭州奥拓机电股份有限公司 | Dynamic and static interaction metering system and metering method |
| CN111891775A (en) * | 2020-08-25 | 2020-11-06 | 山东固润工程技术有限公司 | Intelligent loading hopper and material transferring method |
Non-Patent Citations (2)
| Title |
|---|
| Guo,LW(Guo Liwei) ; Liu,B(Liu Bo).Performance analysis of feeding device of port pneumatic grain unloader in CFD.《MECHATRONICS ENGINEERING, COMPUTING AND INFORMATION TECHNOLOGY》.2015,全文. * |
| 卸船机漏斗测重系统准确性分析与卸料流量控制;张少俊,陈红东;《港口装卸》;20120831;第8-9页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113148593A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3172540B1 (en) | Weighing scale diagnostics method | |
| US5058422A (en) | Electronic balance | |
| CA2815398C (en) | High precision belt weighing device | |
| JP3732614B2 (en) | Quantitative scale | |
| US20030158684A1 (en) | Method and apparatus for measuring weight using uncalibrated load cells | |
| JPS5984117A (en) | Method and device for selecting combination balance weighing acceptable minimum weight | |
| CN106919127B (en) | Material level detection method based on software virtual technology | |
| JP5627261B2 (en) | Weighing device | |
| CN105102940A (en) | System for measuring level of dry bulk material in container | |
| CN109556687A (en) | Weight measurements, device, equipment and computer readable storage medium | |
| CN113148593B (en) | Automatic control system and method for port bulk cargo unloading hopper flow | |
| US4703815A (en) | Span adjusting device for weigher | |
| JP4814485B2 (en) | Abnormality detection method for weighing device and weighing device | |
| JP4744364B2 (en) | Multiple weight sorter | |
| CN207050839U (en) | A kind of matter verifying device and electronic belt weigher system | |
| JP5048822B2 (en) | Abnormality detection method for weighing device and weighing device | |
| EP0758078A2 (en) | Combinational weighing or counting apparatus | |
| JPH0743196A (en) | Stable time checking device for weighing signal in combined weighing machine | |
| JPS5972027A (en) | Display device of electron balance | |
| JP2002243562A (en) | Digital load cell and multi-load cell type weighing machine | |
| JP3732615B2 (en) | Quantitative scale | |
| JP4578216B2 (en) | Control method of weight filling apparatus and weight filling apparatus | |
| CN216310587U (en) | Automatic calculation system for small batch of blast furnace | |
| JP5545628B2 (en) | Combination weigher and control method of conveyance unit in combination weigher | |
| US4792003A (en) | Span adjusting device for weigher |
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 |