Control method of salt pond tarpaulin winding and unwinding device

Abstract

The invention discloses a control method of a salt pond tarpaulin winding and unwinding device, and relates to the field of automatic tarpaulin winding and unwinding control. The take-up and pay-off device comprises reels at the two ends of the salt pond, multiple sets of winches, a control device and a detection device. The control method comprises the steps that the control device controls the reels and the winches to rotate at the preset speed; the detection device detects a first conveying speed and a second conveying speed of movement of two ends of the tarpaulin in real time and transmits the speed to the control device; the control device compares the two speeds with a preset speed, and if deviation exists, the rotating speed of the reel and the rotating speed of the winch are adjusted to be consistent with the preset speed; the detection device detects first tension of ropes at the multiple groups of winches in real time and transmits the first tension to the control device; the control device compares the first tension with first preset tension, and if a certain first tension deviates, the rotating speed of the corresponding winch is adjusted, so that the first tension is consistent with the first preset tension. The method can reduce manual intervention, avoid tarpaulin folding or stretching, prolong the service life of the tarpaulin and improve the automatic control level.

Description

Technical Field

[0001] This invention relates to the field of automatic control of tarpaulin deployment and take-up, and more particularly to a control method for a salt pond tarpaulin deployment and take-up device. Background Technology

[0002] In the brine evaporation stage of the salt-making industry, salt ponds need to be concentrated by sun-drying to precipitate salt particles. On rainy days, tarpaulins must be used to cover the brine to prevent dilution and ensure continuous production. However, the current operation of raising and lowering tarpaulins in salt ponds still largely relies on traditional manual methods, which have significant shortcomings in terms of efficiency, safety, and equipment protection. Firstly, although the tarpaulin is assisted by rollers and winches at both ends in the traditional mode, it lacks a coordinated control mechanism. The speed of winding and unwinding at both ends is prone to deviation, which can cause the tarpaulin to fold or be pulled too much. At this time, a lot of manpower is needed to observe and adjust in real time. During the flood season from June to August, about 25 operations are carried out, each taking 40-60 minutes. The overall cost is high and the efficiency is low.

[0003] Secondly, manual inspection is not accurate enough. Hidden damage such as excessive stretching of the tarpaulin is difficult to detect with the naked eye. In addition, manual adjustment is lagging. From the time the operator discovers the speed deviation to the time he reaches the control panel to adjust the parameters, there is a delay of 3-5 seconds. This short delay is enough to cause the tarpaulin to fold or be overstretched by 20-30 centimeters, thereby shortening the service life of the tarpaulin. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a control method for a salt pond tarpaulin deployment and retraction device.

[0005] To achieve the above objectives, the present invention provides a control method for a salt pond tarpaulin deployment and retraction device, wherein the deployment and retraction device includes a roller located at both ends of the salt pond, multiple sets of winches, a control device, and a detection device, wherein the multiple sets of winches are respectively fixedly connected to one end of the tarpaulin via ropes. The control method includes: The control device controls the rotation of the reel and the winch at preset speeds respectively; The detection device detects the first conveying speed and the second conveying speed of the tarpaulin moving at both ends in real time and transmits the data to the control device. The control device compares the first conveying speed and the second conveying speed with the preset speed respectively. If there is a deviation, it adjusts the rotation speed of the reel and the winch respectively so that the first conveying speed and the second conveying speed are consistent with the preset speed. The detection device detects the magnitude of the first tension of the ropes at multiple winches in real time and transmits it to the control device. The control device compares the multiple first tensions with the first preset tension respectively. If there is a deviation between a certain first tension and the first preset tension, the speed of the corresponding winch is adjusted to make the first tension consistent with the first preset tension.

[0006] Preferably, the control method further includes: The detection device also detects whether the tarpaulin has moved into place and transmits the detection information to the control device. When the tarpaulin is detected to have moved into place, the control device controls the winch and the reel to stop working.

[0007] Preferably, the tarpaulin deployment and retraction includes a tarpaulin release operation and a tarpaulin retraction operation, wherein the control device controls the rotation of the reel and the winch at preset speeds, and the steps include: The control device controls the start-up of multiple sets of winches and pre-tightens the rope; The detection device detects the second tension of the rope at each of the winches in real time and transmits it to the control device; The control device receives and compares the second tension with the second preset tension. When the second tension is equal to the second preset tension, it controls the winch to stop working. When the tarpaulin is released, the control device simultaneously controls multiple sets of winches to rotate at the preset speed. After the winches have rotated for a preset time, the control device controls the reel to rotate at the preset speed. When the tarpaulin is being recycled, the control device controls the roller to rotate at a preset speed. After the roller has rotated for a preset time, the control device simultaneously controls multiple sets of winches to rotate at the preset speed.

[0008] Preferably, the detection device includes a first speed sensor and a second speed sensor. The first speed sensor is connected to the outer periphery of the reel, and the second speed sensor is respectively disposed between each winch and the tarpaulin and wound with a rope. The first speed sensor and the second speed sensor are respectively communicatively connected to the control device. The detection device detects the rotational speed of the reel using the first speed sensor and the moving speed of the rope using the second speed sensor, thereby detecting the first and second conveying speeds at both ends of the tarpaulin.

[0009] Preferably, the detection device further includes a tension sensor, which is disposed between each of the winches and the tarpaulin and is wound with a rope, and the tension sensor is communicatively connected to the control device; The detection device detects the tension of the rope by sensing the tension sensor, thereby detecting the first tension.

[0010] Preferably, the second preset tension is less than the first preset tension. When the control device adjusts the corresponding winch speed to make the first tension consistent with the first preset tension, a graded adjustment is adopted, which includes: When the tension sensor detects that the first tension is less than the second preset tension, the control device controls the winch to reduce its speed until the tension sensor detects that the first tension is the same as the first preset tension, and then stops reducing the speed. When the tension sensor detects that the first tension is greater than the second preset tension and less than the first preset tension, the control device adjusts the speed of the winch according to the value detected by the second speed sensor until the second conveying speed is equal to the preset speed. When the tension sensor detects that the first tension is greater than the first preset tension, the control device controls the winch to increase its rotational speed until the tension sensor detects that the first tension is the same as the first preset tension, and then stops increasing the rotational speed.

[0011] Preferably, the detection device further includes a first limiting device, a second limiting device, and a sensing device. The first limiting device and the second limiting device are respectively installed at a preset end point position and a preset starting point position of the salt pond tarpaulin winding and unwinding. The sensing devices are respectively located on both sides of the tarpaulin near the winch end. The sensing devices are sensively connected to the first limiting device and the second limiting device, respectively. The first limiting device and the second limiting device are communicatively connected to the control device. When the tarpaulin moves and the sensing device is positioned at the first or second limiting device, the first or second limiting device generates a sensing signal and sends the sensing signal to the control device. The control device receives the signal and controls the winch and the reel to stop working.

[0012] Preferably, the retracting device further includes a display device, which is electrically connected to the control device; The control device transmits the real-time operating status of the reel and winch to the display device, which indicates the status using different colors. When the display device shows a red light, it indicates that the reel and winch are in a stopped state. When the display device shows a green light, it indicates that the reel and winch are in operation. When the display device shows a yellow light, it indicates that the reel and winch are in a fault maintenance state.

[0013] Preferably, the launching and receiving device further includes a cloud processing device, which is communicatively connected to the control device; The control device transmits the working status and detection information of the take-up and release device to the cloud processing device in real time, and the cloud processing device displays and allows users to monitor remotely. Users can send control commands through the cloud processing device. The control device receives the control commands and controls and adjusts the start and stop of the reel and winch, the preset speed and the first preset tension.

[0014] Preferably, the receiving and releasing device further includes a meteorological monitoring device, which is installed around the salt pond; The meteorological monitoring device collects meteorological parameters of the salt lake area in real time and transmits the meteorological parameters to the control device, which then uploads them to the cloud processing device.

[0015] Based on this, the beneficial effects of the present invention are as follows: The control method of this invention, in the initial stage of tarpaulin operation, drives multiple sets of winches to pre-tighten the ropes, preventing initial slack from affecting the flatness of the tarpaulin and laying a stable foundation for subsequent operation. During the unwinding and winding stage, the first and second conveying speeds at both ends of the tarpaulin are monitored in real time and compared with preset speeds. If deviations occur, the rotation speeds of the reel and winches are adjusted to prevent tarpaulin wrinkling and deformation due to speed differences. During operation, the first tension of multiple sets of winches is monitored in real time and compared with a first preset tension. If deviations occur, coordinated adjustments are made to ensure synchronous movement of one end of the tarpaulin, reducing tarpaulin deformation. At the end of the tarpaulin operation, the reel and winches are automatically stopped by detecting whether the tarpaulin has moved into position. The entire process requires minimal manual intervention, significantly improving the automation level of tarpaulin unwinding and winding in salt ponds, reducing labor costs, and ensuring salt pond production efficiency and salt quality. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A flowchart illustrating a method for controlling the deployment and retraction of tarpaulins in salt ponds according to one embodiment of the present invention; Figure 2 A schematic diagram illustrating the structure of a salt pond tarpaulin collection and dispensing device according to one embodiment of the present invention; Figure 3 This illustration shows one embodiment of the present invention. Figure 2 A larger image of a portion of point A in the middle; Figure 4 This schematic diagram illustrates the structure of an orbiter according to one embodiment of the present invention. Explanation of reference numerals in the attached drawings: 10-spool, 20-winner, 30-control device, 40-detection device, 401-first speed sensor, 402-second speed sensor, 403-tension sensor, 404-first limit device, 405-second limit device, 50-rail guide, 501-slide rail, 502-first guide rail, 503-second guide rail, 504-spring sheet, 505-hanging ball, 60-display device. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0019] It should be understood that although the terms first, second, third, etc., may be used to describe the acquisition modules in the embodiments of the present invention, these acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

[0020] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0021] It should be noted that the directional terms such as "upper," "lower," "left," and "right" used in the embodiments of the present invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of the present invention. Furthermore, in the context, it should be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0022] Figure 1 This schematic diagram illustrates a method for controlling the deployment and retraction of tarpaulins in salt ponds according to one embodiment of the present invention. Figure 2 This schematic diagram illustrates the structure of a salt pond tarpaulin collection and dispensing device according to one embodiment of the present invention. Figure 3 This illustration shows one embodiment of the present invention. Figure 2 A magnified view of a portion of point A, as shown below. Figure 1-3 As shown, a control method for a salt pond tarpaulin deployment and deployment device according to the present invention includes: The winding and unwinding device includes a reel 10 located at both ends of the salt pond, multiple sets of winches 20, a control device 30, and a detection device 40. The multiple sets of winches 20 are respectively fixedly connected to one end of the tarpaulin via ropes. Its control methods include: S01: The control device 30 controls the rotation of the reel 10 and the winch 20 at preset speeds respectively; S02: The detection device 40 detects the first conveying speed and the second conveying speed of the tarpaulin moving at both ends in real time and transmits the data to the control device 30. S03: The control device 30 compares the first conveying speed and the second conveying speed with the preset speed respectively. If there is a deviation, it adjusts the rotation speed of the reel 10 and the winch 20 respectively so that the first conveying speed and the second conveying speed are consistent with the preset speed. S04: The detection device 40 detects the first tension of the ropes at multiple sets of winches 20 in real time and transmits it to the control device 30; S05: The control device 30 compares the multiple first tensions with the first preset tension respectively. If there is a deviation between a certain first tension and the first preset tension, the speed of the corresponding winch 20 is adjusted to make the first tension consistent with the first preset tension.

[0023] Through the above settings, this invention detects and adjusts the first and second conveying speeds at both ends of the tarpaulin to ensure they match the preset speeds, guaranteeing the flatness of the tarpaulin's operation and preventing folding or excessive stretching caused by one end of the tarpaulin moving too fast or too slow. Furthermore, by detecting and adjusting the first tension of the ropes at multiple sets of winches 20, the consistency of the multiple sets of winches pulling the tarpaulin is achieved, ensuring synchronous movement at one end of the tarpaulin and preventing deformation. Through automatic control and adjustment, manpower can be significantly reduced, and the efficiency of automated work can be improved.

[0024] Furthermore, the control method of the present invention also includes: S06: The detection device 40 also detects whether the tarpaulin has moved into place and transmits the detection information to the control device 30. When the tarpaulin is detected to have moved into place, the control device 30 controls the winch 20 and the reel 10 to stop working.

[0025] The above steps enable automatic stopping of tarpaulin deployment and retraction, further improving the overall level of automation.

[0026] Further, in step S01, the tarpaulin deployment and retraction includes a tarpaulin release operation and a tarpaulin retraction operation. The control device 30 controls the rotation of the reel 10 and the winch 20 at preset speeds, and the steps include: S101: Control device 30 controls multiple sets of winches 20 to start and pre-tighten the rope; S102: The detection device 40 detects the second tension of the rope at each winch 20 in real time and transmits it to the control device 30; S103: The control device 30 receives and compares the second tension with the second preset tension. When the second tension is equal to the second preset tension, the control device 30 stops the winch 20 from working. S104: When the tarpaulin is released, the control device 30 controls multiple sets of winches 20 to rotate at a preset speed. After the winches 20 have rotated for a preset time, the control device 30 controls the reel 10 to rotate at a preset speed. When the tarpaulin is being recycled, the control device 30 controls the roller 10 to rotate at a preset speed. After the roller 10 has rotated for a preset time, the control device 30 simultaneously controls multiple sets of winches 20 to rotate at a preset speed.

[0027] The preset speed is related to the length of the salt pool and the user's planned working time. For example, if the length of the salt pool is 100m and the user's planned working time is 20 minutes, the preset speed is 100 / 20=5m / min. The second preset tension does not exceed the ultimate tensile force of the rope. In the scheme of this application, the preset speed is 3m / min, the second preset tension is 200N, and the preset time is 3s.

[0028] This setup, through pre-tensioning, can prevent tarpaulin from folding, stretching, deforming, or unevenly stressed at the source, ensuring the flatness and equipment safety during subsequent unfolding and retraction, and laying a stable foundation for subsequent operations. Meanwhile, when the tarpaulin is released, the purpose is to unfold the tarpaulin wound on the roller 10 and cover the salt pond. At this time, the "release power" of the tarpaulin is provided by the winch 20, which pulls the tarpaulin away from the roller 10 through the rope of the winch 20. If the roller 10 is turned first and the winch 20 is not pulled, the tarpaulin will be dragged loose at the roller 10 in advance, causing the tarpaulin to droop and fold on the surface of the pond. However, if the winch 20 is turned for 3 seconds first, a stable pulling force can be formed through the rope to ensure that the tarpaulin is always taut and avoids folding. Similarly, when carrying out tarpaulin recycling operations, the purpose is to wind the tarpaulin on the salt pond back onto the reel 10. At this time, the "recycling power" of the tarpaulin is provided by the reel 10, which winds the tarpaulin toward itself through its own transmission. If the winch 20 is turned first and the reel 10 is not pulled, the tarpaulin will be pulled loose at the winch 20 in advance. However, if the reel 10 is turned for 3 seconds first, the pulling force provided by the reel 10 can also ensure that the tarpaulin is always taut, thereby effectively preventing folding.

[0029] Further, in step S02, the detection device 40 includes a first speed sensor 401 and a second speed sensor 402. The first speed sensor 401 is connected to the outer periphery of the reel 10 for transmission. The second speed sensor 402 is respectively disposed between each winch 20 and the tarpaulin and is wound with a rope. The first speed sensor 401 and the second speed sensor 402 are respectively connected to the control device 30 for communication. During testing, the testing device 40 detects the rotational speed of the roller 10 through the first speed sensor 401 and the moving speed of the rope through the second speed sensor 402, so as to detect the first conveying speed and the second conveying speed at both ends of the tarpaulin.

[0030] Similarly, in step S04, the detection device 40 also includes a tension sensor 403, which is disposed between each winch 20 and the tarpaulin and is wound with a rope. The tension sensor 403 is communicatively connected to the control device 30. When testing is performed, the testing device 40 senses the tension of the rope by the tension sensor 403 to detect the first tension.

[0031] Among them, such as Figure 3 As shown, the second speed sensor 402 is meshed with the roller gear around which the rope is wound. The movement of the rope causes the roller to rotate, thereby enabling the second speed sensor 402 to detect the speed of the rope movement.

[0032] The tension sensor 403 is connected to a roller around which the rope is wound. When the rope tightens, it squeezes the roller, which in turn squeezes the tension sensor 403 to achieve the detection of the first tension.

[0033] By setting up sensors, the conveying speed at both ends of the tarpaulin and the tension data of the winch rope can be accurately obtained, improving the accuracy of automated control and reducing manual intervention.

[0034] Furthermore, the second preset tension is less than the first preset tension, and the value of the first preset tension also does not exceed the ultimate tensile strength of the rope. In this application, the first preset tension is 350N. In step S05, when the control device 30 adjusts the corresponding speed of the winch 20 to make the first tension consistent with the first preset tension, a graded adjustment is adopted, which includes: When the tension sensor 403 detects that the first tension is less than the second preset tension, the control device 30 controls the winch 20 to reduce its speed until the tension sensor 403 detects that the first tension is the same as the first preset tension and then stops reducing the speed. When the tension sensor 403 detects that the first tension is greater than the second preset tension and less than the first preset tension, the control device 30 adjusts the speed of the winch 20 according to the value detected by the second speed sensor 402 until the second conveying speed is equal to the preset speed. When the tension sensor 403 detects that the first tension is greater than the first preset tension, the control device 30 controls the winch 20 to increase its speed until the tension sensor 403 detects that the first tension is the same as the first preset tension, and then stops increasing the speed.

[0035] By implementing the above-mentioned graded adjustment steps, fluctuations caused by single adjustments are avoided, and coordinated control of tension and speed is achieved, thereby reducing tarpaulin deformation.

[0036] Furthermore, the detection device 40 also includes a first limiting device 404, a second limiting device 405, and a sensing device (not shown in the figure). The first limiting device 404 and the second limiting device 405 are respectively installed at the preset end point and the preset starting point of the salt pond tarpaulin. The sensing devices are respectively installed on both sides of the tarpaulin near the end of the winch 20. The sensing devices are connected to the first limiting device 404 and the second limiting device 405. The first limiting device 404 and the second limiting device 405 are respectively connected to the control device 30. When the tarpaulin moves and the sensing device is positioned at the first limiting device 404 or the second limiting device 405, the first limiting device 404 or the second limiting device 405 generates a sensing signal and transmits the sensing signal to the control device 30. The control device 30 receives the signal and controls the winch 20 and the reel 10 to stop working.

[0037] The first limiting device 404 and the second limiting device 405 can be configured as magnetic sensors, and the sensing device can be configured as a magnet or a magnetic block.

[0038] The above controls enable automatic stop control of tarpaulin deployment and retraction operations, improving the overall level of automation.

[0039] Furthermore, Figure 4 This schematic diagram illustrates the structure of an orbiter according to one embodiment of the present invention, as shown below. Figure 4As shown, the feeding and unloading device of the present invention also includes a rail feeder 50, which includes a slide rail 501, a first guide rail 502, a second guide rail 503 and a spring plate 504. The slide rail 501 is fixedly installed on the side wall of the salt pond and extends along the conveying direction of the tarpaulin. The first guide rail 502 is connected to the slide rail 501 at an obtuse angle to the end near the roller 10. The second guide rail 503 is connected to the first guide rail 502 at an obtuse angle to the side near the roller 10. The first guide rail 502 and the second guide rail 503 extend away from the side wall of the salt pond, respectively. The spring plate 504 is disposed at the connection between the second guide rail 503 and the first guide rail 502. One end of the spring plate 504 is elastically connected to the second guide rail 503, and the other end extends towards the first guide rail 502. Multiple hanging balls 505 are spaced apart at both edges of the tarpaulin. The hanging balls 505 can be inserted into the slide rail 501, the first guide rail 502 and the second guide rail 503 and slidably connected to them. When the tarpaulin is released, the control device 30 controls the hanging balls 505 on the tarpaulin to enter the first guide rail 502 and the second guide rail 503 respectively, and controls the hanging balls 505 on the second guide rail 503 to enter the slide rail 501 through the spring plate 504, and controls the hanging balls 505 on the first guide rail 502 to arch the spring plate 504 and enter the slide rail 501. When the tarpaulin is being recycled, the control device 30 controls the hanging ball 505 on the slide rail 501 to move toward the roller 10, and all of them enter the second guide rail 503 through the spring plate 504.

[0040] The included angle between the first guide rail 502 and the second guide rail 503 is between 30° and 45°. In the scheme of this application, the first guide rail 502 is 1m long, the second guide rail is 0.7m long, and the included angle between them is 45°.

[0041] Through the above control, when the tarpaulin is retracted, some of the hanging balls 505 on the edge of the tarpaulin slide out of the second guide rail 503 and fall onto the surface of the salt pond. When the hanging balls 505 are affected by external factors such as wind and change position, although the hanging balls 505 cannot correspond to the second guide rail 503, through the above structural setting, the hanging balls 505 can still be in the space between the first guide rail 502 and the second guide rail 503, and will not be located on the side of the first guide rail 502 away from the side wall of the salt pond. When the tarpaulin is released again, some of the hanging balls 505 can enter the second guide rail 503 and some of the hanging balls 505 can enter the first guide rail 502, realizing that all the hanging balls 505 are automatically put into the rails without manual operation, saving manpower, improving the automation and continuity of the overall tarpaulin retraction and release control, and greatly improving work efficiency.

[0042] Furthermore, the retraction and extension device of the present invention also includes a display device 60, which is electrically connected to the control device 30; The control device 30 transmits the working status of the reel 10 and the winch 20 to the display device 60 in real time, and the display device 60 indicates the status using different colors: When the display device shows a red light, it indicates that the reel 10 and the winch 20 are in a stopped state. When the display device shows a green light, it indicates that the reel 10 and the winch 20 are in working condition. When the display device shows a yellow light, it indicates that the reel 10 and the winch 20 are in a fault maintenance state.

[0043] With the above settings, the working status of the reel 10 and the winch 20 can be transmitted to the display device 60 in real time. The display device 60 then uses red, yellow and green lights to intuitively indicate the working status of the entire system. This eliminates the need for manual inspection, allowing for quick monitoring of the operation, ensuring smooth operation, and improving work efficiency.

[0044] Furthermore, the retraction and deployment device of the present invention also includes a cloud processing device (not shown in the figure), which is communicatively connected to the control device 30; The control device 30 transmits the working status and detection information of the take-up and release device to the cloud processing device in real time, and the cloud processing device displays and allows users to monitor remotely. Users can send control commands through the cloud processing device. The control device 30 receives the control commands and controls and adjusts the start and stop of the reel 10 and the winch 20, the preset speed and the first preset tension.

[0045] With the above settings, the cloud processing device can display the tarpaulin deployment and retraction status, and users can remotely control it through the cloud processing module, which can reduce on-site operations, improve the flexibility and timeliness of control, and ensure efficient tarpaulin deployment and retraction.

[0046] Furthermore, the release and recovery device also includes a weather monitoring device (not shown in the figure), which is located around the salt pond and is communicatively connected to the control device 30. The meteorological monitoring device collects meteorological parameters of the salt pond area in real time, including rainfall, temperature, humidity and other data, and transmits the meteorological parameters to the control device 30. The control device 30 then uploads the data to the cloud processing device. At this time, the user can issue the control command for tarpaulin release in advance based on the predicted meteorological parameters, so as to avoid delays caused by rain and dilution of brine, ensure the continuity of salt pond production, and reduce the lag and error of manual meteorological observation.

[0047] In summary, through the control method of this invention, in the initial stage of tarpaulin operation, the control device 30 drives multiple sets of winches 20 to pre-tighten the ropes, avoiding initial slack from affecting the flatness of the tarpaulin and laying a stable foundation for subsequent operation. During the unwinding and winding stage, the first and second conveying speeds at both ends of the tarpaulin are detected in real time and compared with preset speeds. If deviations occur, the rotation speeds of the roller 10 and winches 20 are adjusted to prevent tarpaulin wrinkling and deformation due to speed differences. During operation, the first tension of multiple sets of winches 20 is detected in real time and compared with the first preset tension. If deviations occur, coordinated adjustments are made to ensure synchronous movement of one end of the tarpaulin, reducing tarpaulin deformation. At the end of the tarpaulin operation, the roller 10 and winches 20 are automatically stopped by detecting whether the tarpaulin has moved into position. The entire process requires minimal manual intervention, significantly improving the automation level of tarpaulin unwinding and winding in salt ponds, reducing labor costs, and ensuring salt pond production efficiency and salt quality.

[0048] The above description is merely a preferred embodiment of the present invention. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A control method for a salt pond tarpaulin deployment and retraction device, characterized in that, The winding and unwinding device includes a reel located at both ends of the salt pond, multiple sets of winches, a control device, and a detection device. The multiple sets of winches are respectively fixedly connected to one end of the tarpaulin via ropes. The control method includes: The control device controls the rotation of the reel and the winch at preset speeds respectively; The detection device detects the first conveying speed and the second conveying speed of the tarpaulin moving at both ends in real time and transmits the data to the control device. The control device compares the first conveying speed and the second conveying speed with the preset speed respectively. If there is a deviation, it adjusts the rotation speed of the reel and the winch respectively so that the first conveying speed and the second conveying speed are consistent with the preset speed. The detection device detects the magnitude of the first tension of the ropes at multiple winches in real time and transmits it to the control device. The control device compares the multiple first tensions with the first preset tension respectively. If there is a deviation between a certain first tension and the first preset tension, the speed of the corresponding winch is adjusted to make the first tension consistent with the first preset tension.

2. The control method for a salt pond tarpaulin deployment and retraction device according to claim 1, characterized in that, The control method further includes: The detection device also detects whether the tarpaulin has moved into place and transmits the detection information to the control device. When the tarpaulin is detected to have moved into place, the control device controls the winch and the reel to stop working.

3. The control method for a salt pond tarpaulin deployment and retraction device according to claim 1, characterized in that, The tarpaulin deployment and retraction includes tarpaulin release and tarpaulin retrieval operations. The control device controls the rotation of the reel and the winch at preset speeds, and the steps include: The control device controls the start-up of multiple sets of winches and pre-tightens the rope; The detection device detects the second tension of the rope at each of the winches in real time and transmits it to the control device; The control device receives and compares the second tension with the second preset tension. When the second tension is equal to the second preset tension, it controls the winch to stop working. When the tarpaulin is released, the control device simultaneously controls multiple sets of winches to rotate at the preset speed. After the winches have rotated for a preset time, the control device controls the reel to rotate at the preset speed. When the tarpaulin is being recycled, the control device controls the roller to rotate at a preset speed. After the roller has rotated for a preset time, the control device simultaneously controls multiple sets of winches to rotate at the preset speed.

4. The control method for a salt pond tarpaulin deployment and retraction device according to claim 3, characterized in that, The detection device includes a first speed sensor and a second speed sensor. The first speed sensor is connected to the outer periphery of the reel. The second speed sensor is respectively disposed between each winch and the tarpaulin and is wound with a rope. The first speed sensor and the second speed sensor are respectively connected to the control device in communication. The detection device detects the rotational speed of the reel using the first speed sensor and the moving speed of the rope using the second speed sensor, thereby detecting the first and second conveying speeds at both ends of the tarpaulin.

5. The control method for a salt pond tarpaulin deployment and retraction device according to claim 4, characterized in that, The detection device also includes a tension sensor, which is disposed between each winch and the tarpaulin and is wound with a rope. The tension sensor is communicatively connected to the control device. The detection device detects the tension of the rope by sensing the tension sensor, thereby detecting the first tension.

6. The control method for a salt pond tarpaulin deployment and retraction device according to claim 5, characterized in that, When the second preset tension is less than the first preset tension, and the control device adjusts the corresponding winch speed to make the first tension consistent with the first preset tension, a graded adjustment is adopted, which includes: When the tension sensor detects that the first tension is less than the second preset tension, the control device controls the winch to reduce its speed until the tension sensor detects that the first tension is the same as the first preset tension, and then stops reducing the speed. When the tension sensor detects that the first tension is greater than the second preset tension and less than the first preset tension, the control device adjusts the speed of the winch according to the value detected by the second speed sensor until the second conveying speed is equal to the preset speed. When the tension sensor detects that the first tension is greater than the first preset tension, the control device controls the winch to increase its rotational speed until the tension sensor detects that the first tension is the same as the first preset tension, and then stops increasing the rotational speed.

7. The control method for a salt pond tarpaulin deployment and retraction device according to claim 2, characterized in that, The detection device further includes a first limiting device, a second limiting device, and a sensing device. The first limiting device and the second limiting device are respectively installed at the preset end point and the preset starting point of the salt pond tarpaulin winding and unwinding. The sensing devices are respectively located on both sides of the tarpaulin near the winch end. The sensing devices are respectively connected to the first limiting device and the second limiting device. The first limiting device and the second limiting device are respectively connected to the control device. When the tarpaulin moves and the sensing device is positioned at the first or second limiting device, the first or second limiting device generates a sensing signal and sends the sensing signal to the control device. The control device receives the signal and controls the winch and the reel to stop working.

8. The control method for a salt pond tarpaulin deployment and retraction device according to claim 1, characterized in that, The retracting and extending device also includes a display device, which is electrically connected to the control device; The control device transmits the real-time operating status of the reel and winch to the display device, which indicates the status using different colors. When the display device shows a red light, it indicates that the reel and winch are in a stopped state. When the display device shows a green light, it indicates that the reel and winch are in operation. When the display device shows a yellow light, it indicates that the reel and winch are in a fault maintenance state.

9. The control method for a salt pond tarpaulin deployment and retraction device according to claim 1, characterized in that, The launching and receiving device also includes a cloud processing device, which is communicatively connected to the control device. The control device transmits the working status and detection information of the take-up and release device to the cloud processing device in real time, and the cloud processing device displays and allows users to monitor remotely. Users can send control commands through the cloud processing device. The control device receives the control commands and controls and adjusts the start and stop of the reel and winch, the preset speed and the first preset tension.

10. The control method for a salt pond tarpaulin deployment and retraction device according to claim 9, characterized in that, The receiving and releasing device also includes a meteorological monitoring device, which is installed around the salt pond. The meteorological monitoring device collects meteorological parameters of the salt lake area in real time and transmits the meteorological parameters to the control device, which then uploads them to the cloud processing device.

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