Integrated gate and limit position acquisition method and device

Abstract

The application provides an integrated gate position and limit acquisition method and device, which converts linear motion of a gate into rotation of a gear through accurate transmission ratio between gears, and then amplifies or reduces tiny displacement change, thereby improving sensitivity and accuracy of gate position monitoring, and solving the problem of low accuracy of traditional devices. According to height of the gate and actual requirements, the position is adjusted, the application combines a traditional gate position meter and a limit switch to form an integrated device, variable ratio gears, PLC and a resistance strain type linear displacement sensor work cooperatively to realize omnibearing and high-precision monitoring and control of the gate position, the integrated design not only reduces the size and complexity of the device, but also improves stability and reliability of the device by optimizing connection and communication between parts, and in terms of installation, the integrated design makes the overall structure of the device more compact, and reduces installation steps and required space.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology and relates to an integrated gate position and limit position acquisition method and device. Background Technology

[0002] Integrated gate position and limit switch acquisition devices are key equipment used in water conservancy, power, and municipal engineering fields to collect gate position information and limit switch status. Their working principle is as follows: The mechanical displacement of the gate is converted into electrical or digital signals to obtain gate position information, and limit switches and other devices are used to trigger signals to determine the limit switch status. In practical applications, integrated gate position and limit switch acquisition devices typically include the following key components:

[0003] 1. Mechanical structure: including gear set, limit switch slide, micro limit switch baffle and base, etc., responsible for accurately transmitting the movement of the gate and converting it into a detectable signal.

[0004] 2. Electrical Components: Composed of electrical components such as PLC, linear displacement sensor, and micro limit switch, which realize the functions of signal processing, transmission and control.

[0005] Currently, various types of gate position and limit switch acquisition devices are available on the market to achieve effective control and monitoring of gates. Some use contact-type acquisition devices, such as mechanical limit switches and resistive displacement sensors; others use non-contact acquisition devices, such as infrared, ultrasonic, and laser sensors; and still others have enhanced their anti-interference capabilities and stability through optimized structural design.

[0006] However, the aforementioned existing devices still have the following problems:

[0007] 1. Existing gate position and limit switch acquisition devices are insufficient to meet the high-precision requirements of certain scenarios. For example, some devices have large measurement errors in the 0-10m range, failing to reach the high-precision standard of ±1cm, and thus cannot accurately control and monitor the gate opening.

[0008] 2. Most devices are inconvenient to install, cannot flexibly adapt to different gate structures and installation environments, and are difficult to maximize the use of the stroke within a limited internal stroke range, making them unsuitable for the vast majority of gate openings.

[0009] 3. Low level of informatization and limited communication methods make it difficult to meet the needs of automated control, affecting the service life and reliability of equipment. Summary of the Invention

[0010] To address the aforementioned issues, this invention proposes an integrated gate position and limit position acquisition method and device. Based on innovative mechanical structure design and electrical component optimization, coupled with precise control methods, it improves the device's accuracy, installation convenience, applicability, and reliability, thus meeting practical needs such as water conservancy automation.

[0011] To achieve the above objectives, the technical solution of the present invention is as follows:

[0012] The integrated gate position and limit switch acquisition method includes the following steps:

[0013] In the initial state, there is a certain distance between the limit block and the limit groove, and they do not contact each other; when the door panel moves, the connecting plate moves with the door panel, and the right-angle gear one, which is engaged with the gear groove of the connecting plate, rotates. The right-angle gear one drives the right-angle gear two, which is fixed to it, to rotate together. The monitor monitors the rotation of the right-angle gear two. Through the transmission ratio between the gears, the linear motion of the gate is converted into the rotation of the gears.

[0014] The resistance strain gauge linear displacement sensor monitors the actual opening degree of the gate in real time and transmits the data to the PLC. At the same time, the encoder transmits the data reflecting the gate position to the PLC. The PLC continuously compares and analyzes these two sets of data. When it detects a mismatch between the opening degree and the encoder data, it issues an alarm.

[0015] When the lower end of the connecting plate is in contact with the baffle, the baffle sends a sensing signal to the controller. After receiving the signal, the controller drives the cylinder to start. The start of the cylinder will drive the limit block to move. The limit block approaches the limit groove and engages with the limit groove, thereby limiting and fixing the connecting plate. The door panel that is fixedly connected to the connecting plate is also limited and fixed.

[0016] Furthermore, when an imbalance is detected between the opening degree and the encoder data, an alarm is issued, and a gear set with a suitable gear speed ratio is selected. After adjustment, the PLC continuously monitors the data transmitted from the linear displacement sensor and the encoder, and compares the opening degree and encoder data again. If an imbalance still exists, the above steps are repeated until the opening degree and encoder data match, ensuring that the gate position is consistent with the set value.

[0017] An integrated gate position and limit switch acquisition device, used to implement the aforementioned integrated gate position and limit switch acquisition method, includes a gate plate, within which a door panel capable of vertical movement is installed. A connecting plate is provided on one side of the gate plate, and the connecting plate is fixedly connected to the door panel. A slot is formed on the surface of the gate plate, and a connecting block is fixed in the slot. A right-angle gear one is rotatably connected to the connecting block. The right-angle gear one is fixedly connected to a right-angle gear two via a connecting rod. The right-angle gear two is rotatably connected to the gate plate. A controller is fixed on the connecting plate. A set of gear grooves is formed on the side of the connecting plate facing the door panel, and the gear grooves can movably engage with the external teeth of the right-angle gear one. A slider is provided on the surface of the connecting plate. The gate plate has a set of limiting grooves longitudinally formed on its surface. Sliding grooves are provided on both sides of the limiting grooves, and these sliding grooves are parallel to the limiting grooves. A limiting block is provided on the side of the slider facing the sliding groove, and the limiting block can engage with the limiting groove. The limiting block is connected to a drive mechanism, which can drive the limiting block to move in a direction perpendicular to the sliding groove. The gate plate also has a trigger mechanism located on the moving path of the connecting block. When triggered by the connecting block, the trigger mechanism transmits a trigger signal to the controller. The gate plate also includes a monitor for collecting rotation data of the right-angle gear and transmitting it to the controller. The controller receives the data and controls the operation of the drive mechanism.

[0018] Furthermore, a bracket is fixed on the gate plate, the second right-angle gear is rotatably connected to the bracket, and the monitor is fixed on the bracket to collect the rotation data of the second right-angle gear.

[0019] Furthermore, two limiting rods are fixed on the surface of the connecting plate. The limiting rods are arranged parallel to the slide groove, and the slider is sleeved on the limiting rods and can slide along the limiting rods.

[0020] Furthermore, the surface of the connecting plate is provided with a set of circular grooves with internal threads, and two fixing plates are fixedly connected to the left surface of the slider. The distance between the two fixing plates is equal to the distance between adjacent circular grooves, and the two fixing plates are connected to the connecting plate by screws.

[0021] Furthermore, the driving mechanism is a cylinder, and the cylinder piston is fixedly connected to the limiting block.

[0022] Furthermore, the triggering mechanism is a baffle.

[0023] Furthermore, the monitor is an encoder.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention converts the linear motion of the gate into gear rotation through a precise gear transmission ratio, thereby amplifying or reducing minute displacement changes and improving the sensitivity and accuracy of gate position monitoring. This solves the problem of low accuracy in traditional devices. When there is a mismatch between the actual gate opening and the encoder data, a more suitable gear transmission ratio can be obtained through repeated calculations and data acquisition, guiding hardware debugging and replacement, and achieving precise control of the gate position.

[0026] 2. This invention adjusts the slider position according to the gate height and actual needs, combining a traditional gate position gauge and limit switch into an integrated device, simplifying the on-site installation process and shortening the construction cycle. The variable ratio gear, PLC, and resistance strain gauge linear displacement sensor work together to achieve comprehensive, high-precision monitoring and control of the gate position. This integrated design not only reduces the size and complexity of the device but also improves its stability and reliability by optimizing the connections and communication between the various parts.

[0027] 3. This invention adopts a modular design, supporting quick replacement of gear sets or sensors, reducing maintenance costs. Compared with similar products on the market, it reduces material waste by 20% to 30% through optimized gear ratio design, extends the service life of the gate, and reduces maintenance costs due to safety accidents caused by over-extension. The dual limit protection (mechanical + electrical) and electromagnetic isolation design significantly reduce equipment damage and personnel operation risks. The PLC real-time monitoring and remote communication functions support intelligent management, reduce human operation errors, and are compatible with more than 90% of gate opening requirements. It is suitable for various scenarios such as water conservancy projects, flood control facilities, and agricultural irrigation.

[0028] 4. This invention solves the pain points of traditional gate and limit devices, such as low accuracy, susceptibility to environmental interference, and complex installation, through the integrated innovation of precision mechanical transmission, intelligent electrical control, and environmentally adaptable design. The whole device achieves high-precision positioning through the collaboration of variable ratio gears and PLC, and mechanical triggering and sealing protection ensure long-term reliable operation. It is low-cost, low-maintenance, and long-life, which significantly improves the management efficiency of water conservancy projects. Attached Figure Description

[0029] Figure 1 A schematic diagram of the overall structure of the integrated gate position and limit position acquisition device provided by the present invention.

[0030] Figure 2 This is a schematic diagram of the overall exploded structure of the integrated gate position and limit position acquisition device provided by the present invention.

[0031] Figure 3 This is a schematic diagram of the connecting plate structure in the integrated gate position and limit position acquisition device provided by the present invention.

[0032] Figure 4Another angle view of the connecting plate in the integrated gate and limit acquisition device provided by the present invention.

[0033] Figure 5 A schematic diagram of the connection between two right-angle gears in the integrated gate and limit acquisition device provided by the present invention.

[0034] Figure 6 This is a schematic diagram of the slider structure in the integrated gate position and limit position acquisition device provided by the present invention.

[0035] List of identifiers in attached diagrams:

[0036] 1. Gate plate; 2. Connecting plate; 3. Controller; 4. Limit groove; 5. Slot; 6. Baffle; 7. Cylinder; 8. Slide groove; 9. Limit rod; 10. Connecting block; 11. Right angle gear one; 12. Right angle gear two; 13. Circular groove; 14. Fixing plate; 15. Slider; 16. Gear groove; 17. Bracket; 18. Monitor; 19. Limit block; 20. Rectangular groove. Detailed Implementation

[0037] The technical solutions provided by the present invention will be described in detail below with reference to specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0038] Please see Figures 1 to 6 The integrated gate position and limit position acquisition device provided by the present invention includes a gate plate 1, and a door plate that can move up and down is provided inside the gate plate 1. The up and down movement mechanism of the door plate is the same as that of the prior art, and will not be described again in the present invention. Figure 2As shown, a connecting plate 2 is provided on the left side of the gate 1. The connecting plate 2 is fixedly connected to the door panel inside the gate 1, and a controller 3 is fixedly installed on the left surface of the connecting plate 2. The controller 3 receives signals from the monitor, baffle, etc., and makes decisions based on these signals to drive the actuators such as cylinders to operate. A slot 5 is provided on the left surface of the gate 1. A connecting block 10 is fixedly connected in the slot 5. A right angle gear 11 is rotatably connected in the connecting block 10. A right angle gear 12 is rotatably connected to the rear surface of the gate 1. A connecting rod is fixedly connected to the front surface of the right angle gear 12. The right angle gear 11 is fixedly connected to the connecting rod. A set of gear grooves 16 is provided on the right surface of the connecting plate 2. The set of gear grooves 16 is sawtooth-shaped and can be movably engaged with the right angle gear 11, that is, the right angle gear 11 can roll along the gear grooves 6. A bracket 17 is fixedly installed on the rear surface of the gate 1. A monitor 18 is fixedly installed in the bracket 17. The right angle gear 12 is rotatably connected to the bracket 17. During operation, the gate's movement causes the connecting plate 2 to move as well. This movement drives the engaged right-angle gear 11 to rotate, which in turn drives the fixed right-angle gear 12 to rotate as well. The monitor 18 monitors the rotation of the right-angle gear 12. The monitor can be an encoder, which is associated with the rotating gear. As the gear rotates, the encoder moves accordingly, converting the speed, position, and angle of the mechanical movement into electrical signals using methods such as optocoupler scanning, thus obtaining encoder data. The monitor indirectly obtains the gate's displacement by monitoring gear rotation, thereby determining the gate's opening position. This invention, through a precise transmission ratio between gears, converts the gate's linear motion into gear rotation, amplifying or reducing minute displacement changes, improving the sensitivity and accuracy of gate position monitoring, and solving the problem of low accuracy in traditional devices. Specifically, by adjusting the ratio of the diameter or number of teeth of the driving and driven gears (i.e., the transmission ratio), a small linear displacement can be amplified into a larger angular rotation of the gears. This makes it easier for a monitor (such as an encoder) to capture the displacement change, improving the sensitivity and accuracy of the monitoring. If the displacement change itself is large, direct monitoring may result in large errors due to insufficient precision. In this case, by reducing the displacement change, the large displacement can be converted into a smaller rotation angle of the gears. This allows for more precise monitoring of the gear rotation using more sophisticated monitoring equipment (such as an encoder), thereby improving the accuracy of gate position monitoring.

[0039] Specifically, the right-angle gear 11 and right-angle gear 212 must have a specific proportional relationship to achieve the required precision of this invention. Through research on precision gear speed ratios, and based on the diameters of different types of driving and driven gears, a set of gear ratio formulas is calculated and formulated. Different standard precision gear sets are then configured. The device requires a maximum permissible error of ±1cm within the 0-10m range, and a mechanical transmission precision ≤0.1mm. The aforementioned gear ratio formula is:

[0040]

[0041] Where i is the transmission ratio, D1 and D2 are the diameters of right-angle gear one and right-angle gear two, respectively, and N1 and N2 are the number of teeth of the two gears. By adjusting the transmission ratio, the linear displacement L of the gate can be converted into the rotation angle θ of the gears:

[0042]

[0043] A slider 15 is provided in front of the connecting plate 2. Two limiting rods 9 are fixedly connected to the surface of the connecting plate 2. Both limiting rods 9 are movably connected to the slider 15. The slider 15 has two sliding holes. The slider 15 is fitted onto the limiting rods through the sliding holes, and the limiting rods play a limiting and guiding role for the slider. Two sliding grooves 8 are opened on the front surface of the gate plate 1. Both sliding grooves 8 are movably connected to the slider 15. A baffle 6 is fixedly installed on the front surface of the gate plate 1. The baffle 6 serves as a triggering mechanism and is located below the sliding grooves. The gate plate 1 (excluding the movable gate) is movably connected to the connecting plate 2. The connecting plate 2 is fixedly connected to the door panel provided inside the gate plate 1. A limiting block 19 is movably engaged inside the slider 15. A cylinder 7 is fixedly installed on the front surface of the slider 15. The piston of the cylinder 7 is fixedly connected to the limiting block 19. A set of limiting grooves 4 are opened on the front surface of the gate plate 1. All of these limiting grooves 4 can engage with the limiting blocks 19. In this example, the limiting blocks and limiting grooves are provided with serrations of matching size. Cylinder 7 can also be replaced by other linear drive components, such as a linear motor. In terms of installation, the integrated design makes the overall structure of the device more compact, reducing installation steps and required space, and solving the problem of inconvenient installation. A set of internally threaded circular grooves 13 are formed on the front surface of the connecting plate 2. Each of these grooves 13 is threaded onto two hexagonal socket screws. Two fixing plates 14 are fixedly connected to the left surface of the slider 15, and both fixing plates 14 are threaded onto the aforementioned hexagonal socket screws. A rectangular groove 20 is formed on the surface of the slider 15 facing the connecting plate. The rectangular groove 20 is movably engaged with the limit block 19. When the connecting plate 2 moves downwards, its lower end will contact the baffle 6. A contact sensor, such as a microswitch, can be installed at the baffle 6. When the lower end of the connecting plate contacts the baffle, and the baffle 6 is subjected to external force generated by the displacement of the connecting plate 2, the microswitch will convert the pressure on the baffle into an electrical signal, and send the output switch signal to the controller 3 for processing. After receiving the signal, controller 3 will drive cylinder 7 to start. Cylinder 7 will then move the fixed limit block 19, which moves towards the connecting plate and engages with a set of limit grooves 4 on the front surface of gate 1. This limits and fixes the connecting plate 2. Since the connecting plate 2 is fixedly connected to the gate panel inside gate 1, the gate panel is also limited and fixed. Turning the two Allen screws will loosen the limit fixing of slider 15, allowing slider 15 to slide on the connecting plate 2. Its position can be adjusted according to the gate height and actual needs.

[0044] The working principle of this invention is as follows:

[0045] During operation, the movement of the gate plate causes the connecting plate 2 to move together. The movement of the connecting plate 2 drives the right-angle gear 11 to rotate. When the right-angle gear 11 rotates, it drives the fixed right-angle gear 12 to rotate together. A monitor 18 is set on the surface of the right-angle gear 12 for monitoring. Through the precise transmission ratio between the gears, the linear motion of the gate is converted into the rotation of the gears, thereby amplifying or reducing the minute displacement changes, improving the sensitivity and accuracy of gate position monitoring, and solving the problem of low accuracy of traditional devices. When the connecting plate 2 moves downward, its lower end will fit against the baffle 6. When the baffle 6 is subjected to the external force generated by the displacement of the connecting plate 2, it will send the sensing signal to the controller 3 for processing. When the controller 3 receives the signal, it will drive the cylinder 7 to start. The start of the cylinder 7 will drive the fixed limit block 19 to move together. The limit block 19 moves forward and will engage with a set of limit grooves 4 opened on the front surface of the gate plate 1. At this time, the connecting plate 2 is limited and fixed. The connecting plate 2 is fixedly connected to the door panel inside the gate plate 1. At this time, the door panel is limited and fixed.

[0046] This device can be further connected to an external PLC to monitor the actual opening degree of the gate panel in real time via a resistance strain gauge linear displacement sensor and transmit the data to the PLC. Simultaneously, the encoder also transmits its acquired data reflecting the gate position (via the controller) to the PLC for mutual verification. The PLC continuously compares and analyzes these two sets of data to determine if there is a mismatch between the opening degree and the encoder data. When a mismatch is detected, an alarm message is sent, prompting for debugging, inspection, or gear replacement. A gear set with higher precision and a more suitable gear ratio can be used. A threshold can be preset in the PLC control. When the difference between the actual gate opening degree and the opening degree reflected by the encoder data exceeds this threshold, a mismatch is considered. If the difference is within the threshold range, they are considered consistent. In actual monitoring, there will inevitably be slight deviations between the actual gate opening degree and the encoder data due to factors such as mechanical transmission clearance and sensor accuracy. If no threshold is set, the PLC may frequently adjust due to extremely small errors, leading to system instability. Furthermore, the PLC analyzes the pre-set program logic, first determining the direction and degree of the misalignment, i.e., whether the actual gate opening is greater than or less than the opening reflected by the encoder data, and the magnitude of the difference between the two. Based on the judgment result, the PLC calculates the gear transmission ratio that needs to be adjusted. Through experiments, we established an adjustment parameter k based on the difference between the actual gate opening and the opening reflected by the encoder data, k = α × ε + β × ε sum +γ×(ε-ε pre ), where α, β, and γ are adjustment coefficients, and ε is the opening difference. sumε is the cumulative value of the opening difference. pre This represents the difference in aperture size obtained from the previous measurement. If there is no previously obtained difference in aperture size, then (ε-ε) pre The overall value is set to 0. The new gear ratio can be obtained using the following formula: i new =i(1±k)×i. Based on the new gear ratio, select a suitable gear set. After adjusting the gear set, the PLC continuously monitors the data from the linear displacement sensor and encoder, and compares the actual gate opening with the encoder data again. If there is still a mismatch, continue to adjust according to the above steps until the opening matches the encoder data, ensuring that the gate position is consistent with the set value, and achieving precise control of the gate position, ensuring that the gate position is consistent with the set value.

[0047] This invention combines a traditional gate position gauge and a limit switch into an integrated device. The variable ratio gear, PLC, and resistance strain gauge linear displacement sensor work together to achieve comprehensive and high-precision monitoring and control of the gate position. This integrated design not only reduces the size and complexity of the device, but also improves the stability and reliability of the device by optimizing the connection and communication between the parts. The microswitch's single-sided dual-trigger design (front and rear trigger points) provides redundant protection, preventing over-travel due to single-point failure. Sealed design and waterproof / lightning protection measures ensure stable operation in harsh environments ranging from -20℃ to +50℃ and 90% humidity. High-voltage and low-voltage lines are completely physically isolated, avoiding electromagnetic interference and electric shock risks. The prototype has passed laboratory testing (such as transmission accuracy and life cycle testing) and its stability has been verified in actual engineering projects. In case of failure, the preset RS485 communication interface supports remote diagnostics, reducing downtime. Overall ±1cm error control (0-10m travel) and 0.01mm-level sensor accuracy far exceed traditional mechanical / electronic limit devices. Mechanical life ≥100,000 cycles, mean time between failures ≥25,000 hours, reducing maintenance frequency. The sealed structure, waterproof design, and corrosion-resistant materials adapt to harsh environments common in water conservancy projects, such as humidity, dust, and large temperature differences. Mechanical triggering does not rely on a power supply, and its electromagnetic interference resistance is significantly better than electronic limit switches.

[0048] This device, through integrated innovation of precision mechanical transmission, intelligent electrical control, and environmentally adaptable design, solves the pain points of traditional gate and limit devices, such as low accuracy, susceptibility to environmental interference, and complex installation. The overall design achieves high-precision positioning through the coordinated use of variable ratio gears and a PLC. Mechanical triggering and sealing protection ensure long-term reliable operation. It boasts low cost, low maintenance, and long lifespan, significantly improving the efficiency of water conservancy project management. The integrated gate and limit device plays a crucial role in flood control, agricultural irrigation, and environmental protection. During gate operation, it controls the gate's position, preventing misalignment or exceeding limits, thus avoiding safety accidents, protecting personnel and equipment, and helping managers achieve precise water resource scheduling and efficient utilization. It improves water resource management efficiency, gate operating efficiency, reduces downtime due to human error, extends gate lifespan, and ensures the normal operation of water conservancy projects. The device is simple to install, highly stable, and each unit saves costs compared to similar devices on the market, offering a significant price advantage. It also improves water resource utilization efficiency in flood control, agricultural irrigation, and environmental protection, extending gate lifespan and is expected to generate significant economic and social benefits.

[0049] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. An integrated gate position and limit acquisition device, comprising a gate plate, wherein the gate plate is provided with a door panel capable of vertical movement, characterized in that, To implement an integrated gate position and limit position acquisition method, a connecting plate is provided on one side of the gate, and the connecting plate is fixedly connected to the gate panel; a slot is formed on the surface of the gate, and a connecting block is fixed in the slot; a right-angle gear one is rotatably connected to the connecting block; the right-angle gear one is fixedly connected to a right-angle gear two through a connecting rod; the right-angle gear two is rotatably connected to the gate; a controller is fixed on the connecting plate; a set of gear grooves is formed on the side of the connecting plate facing the gate panel; the gear grooves can be movably engaged with the external teeth of the right-angle gear one; a slider is provided on the surface of the connecting plate; a set of limit grooves is formed longitudinally on the surface of the gate, and sliding grooves are provided on both sides of the limit grooves. The slide groove and the limiting groove are arranged parallel to each other. A limiting block is provided on the side of the slider facing the slide groove. The limiting block can engage with the limiting groove. The limiting block is connected to the driving mechanism, which can drive the limiting block to move in a direction perpendicular to the slide groove. A triggering mechanism is also provided on the gate plate. The triggering mechanism is on the moving path of the connecting plate. When the triggering mechanism is triggered by the connecting plate, it transmits a trigger signal to the controller. It also includes a monitor. The monitor is used to collect the rotation data of the right angle gear II and transmit it to the controller. The controller is used to receive the data and control the action of the driving mechanism. The triggering mechanism is a baffle, and the monitor is an encoder. The integrated gate position and limit position acquisition method includes the following steps: In the initial state, there is a certain distance between the limit block and the limit groove, and they do not contact each other; when the door panel moves, the connecting plate moves with the door panel, and the right-angle gear one, which is engaged with the gear groove of the connecting plate, rotates. The right-angle gear one drives the right-angle gear two, which is fixed to it, to rotate together. The monitor monitors the rotation of the right-angle gear two. Through the transmission ratio between the gears, the linear motion of the gate is converted into the rotation of the gears. The resistance strain gauge linear displacement sensor monitors the actual opening degree of the gate in real time and transmits the data to the PLC. At the same time, the encoder transmits the data reflecting the gate position to the PLC. The PLC continuously compares and analyzes these two sets of data. When it detects a mismatch between the opening degree and the encoder data, it issues an alarm, selects a gear set with a suitable gear ratio, and after adjustment, the PLC continues to monitor the data from the linear displacement sensor and the encoder, comparing the opening degree and the encoder data again. If a mismatch still exists, it continues to adjust according to the above steps until the opening degree and the encoder data match, ensuring that the gate position is consistent with the set value. When the lower end of the connecting plate is in contact with the baffle, the baffle sends a sensing signal to the controller. After receiving the signal, the controller drives the cylinder to start. The start of the cylinder will drive the limit block to move. The limit block approaches the limit groove and engages with the limit groove, thereby limiting and fixing the connecting plate. The door panel that is fixedly connected to the connecting plate is also limited and fixed.

2. The integrated gate position and limit position acquisition device according to claim 1, characterized in that, A bracket is fixed on the gate plate, the second right-angle gear is rotatably connected to the bracket, and the monitor is fixed on the bracket to collect the rotation data of the second right-angle gear.

3. The integrated gate position and limit position acquisition device according to claim 1, characterized in that, Two limiting rods are fixed on the surface of the connecting plate. The limiting rods are arranged parallel to the slide groove. The slider is sleeved on the limiting rods and can slide along the limiting rods.

4. The integrated gate position and limit position acquisition device according to claim 1, characterized in that, The connecting plate has a set of circular grooves with internal threads on its surface. Two fixing plates are fixedly connected to the left surface of the slider. The distance between the two fixing plates is equal to the distance between adjacent circular grooves. The two fixing plates are connected to the connecting plate by screws.

5. The integrated gate position and limit position acquisition device according to claim 1, characterized in that, The driving mechanism is a cylinder, and the cylinder piston is fixedly connected to the limiting block.

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