Circuit board with anti-swing function

Abstract

This utility model discloses a circuit board with anti-sway function, including a circuit board body. The circuit board body is equipped with a bus control circuit, a central frequency converter management circuit, a protection monitoring circuit, a frequency converter adjustment circuit, and an anti-sway control circuit. Mounting holes are provided at each of the four corners of the circuit board body. The central frequency converter management circuit is connected to the protection monitoring circuit, the bus control circuit, the frequency converter adjustment circuit, and the anti-sway control circuit. The anti-sway control circuit is connected to a PID feedback circuit, a load swing angle monitoring circuit, a speed correction circuit, a motor control circuit, and a speed setting circuit. This utility model's circuit board with anti-sway function utilizes PID closed-loop feedback to optimize the trolley speed, thereby controlling the swing angle of the lifting rope. It adaptively adjusts control parameters under different rope lengths, achieving good anti-sway performance under various rope lengths, thus improving the crane's operational safety and work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of crane frequency converter circuit control technology, and in particular to a circuit board with anti-sway function. Background Technology

[0002] A circuit board with anti-sway function is a circuit structure used for controlling the frequency converter circuit of a crane. The basic task of a crane is to vertically lift heavy objects, and it can also move heavy objects horizontally over short distances to meet the requirements of loading, unloading, transferring, and installing heavy objects. Cranes are essential mechanical equipment in modern production. They are of great significance in reducing heavy manual labor, improving labor productivity, realizing the mechanization and automation of the production process, and improving people's material and cultural life. With the continuous development of technology, people's requirements for circuit boards with anti-sway function are also getting higher and higher.

[0003] Existing crane control circuit boards have certain drawbacks in use. Cranes are important logistics and transportation equipment, widely used in docks, hydropower stations, factory workshops, material storage, and other fields. Because cranes are flexible, underdamped systems, the load inevitably sways during startup, acceleration, deceleration, and stopping due to inertial forces. If the sway angle is not limited, it will not only significantly affect the crane's loading and unloading efficiency but also seriously threaten the safety of surrounding equipment and personnel. Therefore, we propose a circuit board with anti-sway functionality. Utility Model Content

[0004] Technical problem solved: To address the shortcomings of existing technologies, this utility model provides a circuit board with anti-sway function. It utilizes PID closed-loop feedback to optimize the trolley speed and control the swing angle of the hoisting rope. The control parameters are adaptively adjusted under different rope lengths, so that a good anti-sway effect can be obtained under different rope lengths, thereby improving the operating safety and working efficiency of the crane and effectively solving the problems in the background technology.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows: a circuit board with anti-sway function, wherein a bus control circuit, a central frequency conversion management circuit, a protection monitoring circuit, a frequency conversion adjustment circuit and an anti-sway control circuit are installed on the main body of the circuit board. Mounting holes are provided at the four corners of the main body of the circuit board. The central frequency conversion management circuit is connected to the protection monitoring circuit, the bus control circuit, the frequency conversion adjustment circuit and the anti-sway control circuit. The anti-sway control circuit is connected to a PID feedback circuit, a load swing angle monitoring circuit, a speed correction circuit, a motor control circuit and a speed setting circuit.

[0006] Preferably, the frequency conversion regulation circuit is connected to a stepless speed regulation circuit, a four-quadrant motion control circuit, an acceleration / deceleration control circuit, a current feedback circuit, and a frequency conversion speed control circuit, and the protection monitoring circuit is connected to a short circuit monitoring circuit, an overload monitoring circuit, an overvoltage monitoring circuit, and an overheat monitoring circuit.

[0007] Preferably, the bus control circuit is connected to a communication protocol circuit, which is connected to an anti-hook slippage protection circuit, a brake monitoring and protection circuit, and a crane status protection circuit.

[0008] Preferably, the frequency conversion regulating circuit controls the stepless speed regulation circuit, the four-quadrant motion control circuit, the acceleration / deceleration control circuit, the current feedback circuit, and the frequency conversion speed regulation control circuit, and the output terminals of the short-circuit monitoring circuit, the overload monitoring circuit, the overvoltage monitoring circuit, and the overheat monitoring circuit are electrically connected to the input terminal of the protection monitoring circuit.

[0009] Preferably, the output terminals of the anti-hook slippage protection circuit, the brake monitoring and protection circuit, and the crane status protection circuit are electrically connected to the input terminal of the bus control circuit through a communication protocol circuit.

[0010] Preferably, the central frequency conversion management circuit is bidirectionally connected to the bus control circuit, protection monitoring circuit, frequency conversion adjustment circuit and anti-sway control circuit, and the anti-sway control circuit is bidirectionally connected to the PID feedback circuit, the load swing angle monitoring circuit, the speed correction circuit, the motor control circuit and the speed setting circuit.

[0011] Beneficial Effects: Compared with the prior art, this utility model provides a circuit board with anti-sway function, which has the following beneficial effects: This circuit board with anti-sway function utilizes PID closed-loop feedback to optimize the trolley speed and control the swing angle of the hoisting rope. It adaptively adjusts the control parameters under different rope lengths, so that a good anti-sway effect can be obtained under different rope lengths, thereby improving the operating safety and working efficiency of the crane. It is applied to cranes with anti-sway crane frequency converters. Based on the mathematical modeling method, the bridge crane is analyzed. At the same time, based on the model, state feedback control and fuzzy theory control methods are studied to design a crane system with good closed-loop feedback characteristics and anti-sway. At the same time, the insensitivity of fuzzy control theory to model changes is utilized to eliminate the influence of nonlinearity, time-varying nature and uncertainty of the bridge crane swing system. The theoretical research results are applied to the hardware integration of a single-chip microcomputer and implemented in the frequency converter control program to realize the practical application of the bridge crane anti-sway control system.

[0012] The crane can eliminate swaying in a short time during acceleration and deceleration. The control algorithm has good robustness. It can effectively resist external interference during hoisting and requires the system to start operation directly when the load has an initial sway angle. Based on anti-sway control, it can achieve rapid tracking of speed and position, and achieve precise positioning of the trolley. In actual operation, the crane is affected by wind resistance and its own nonlinearity. Fuzzy control algorithm is used to eliminate the uncertainty of the bridge crane's swaying system. Cranes equipped with dedicated anti-sway crane frequency converters can reduce unnecessary load swaying. This function reduces load swaying by adjusting the speed setpoint provided by the operator. It allows the crane operator to better control the crane, reducing working time through higher speeds and shorter acceleration and deceleration times. This function does not require any additional anti-sway sensors. This function needs to work with the trolley to control the acceleration and deceleration of the trolley and trolley to achieve the anti-sway function. The entire circuit board with anti-sway function has a simple structure, is easy to operate, and has better performance than traditional methods. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a circuit board with anti-sway function according to the present invention.

[0014] Figure 2 This is a schematic diagram of the anti-sway control circuit in a circuit board with anti-sway function according to this utility model.

[0015] Figure 3 This is a schematic diagram of the frequency conversion adjustment circuit in a circuit board with anti-sway function according to the present invention.

[0016] Figure 4 This is a schematic diagram of the protective monitoring circuit in a circuit board with anti-sway function according to this utility model.

[0017] Figure 5 This is a schematic diagram of the bus control circuit in a circuit board with anti-sway function according to this utility model.

[0018] In the diagram: 1. Circuit board body; 2. Bus control circuit; 3. Communication protocol circuit; 4. Central frequency converter management circuit; 5. Protection and monitoring circuit; 6. Mounting hole; 7. Frequency conversion adjustment circuit; 8. Anti-sway control circuit; 9. PID feedback circuit; 10. Load swing angle monitoring circuit; 11. Speed ​​correction circuit; 12. Motor control circuit; 13. Speed ​​setting circuit; 14. Stepless speed regulation circuit; 15. Four-quadrant motion control circuit; 16. Acceleration and deceleration control circuit; 17. Current feedback circuit; 18. Frequency conversion speed regulation control circuit; 19. Short circuit monitoring circuit; 20. Overload monitoring circuit; 21. Overvoltage monitoring circuit; 22. Overheat monitoring circuit; 23. Anti-hook slippage protection circuit; 24. Brake monitoring and protection circuit; 25. Crane status protection circuit. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1-5As shown, a circuit board with anti-sway function includes a circuit board body 1. The circuit board body 1 is equipped with a bus control circuit 2, a central frequency conversion management circuit 4, a protection monitoring circuit 5, a frequency conversion adjustment circuit 7, and an anti-sway control circuit 8. Mounting holes 6 are provided at each of the four corners of the circuit board body 1. The central frequency conversion management circuit 4 is connected to the protection monitoring circuit 5, the bus control circuit 2, the frequency conversion adjustment circuit 7, and the anti-sway control circuit 8. The anti-sway control circuit 8 is connected to a PID feedback circuit 9, a load swing angle monitoring circuit 10, a speed correction circuit 11, a motor control circuit 12, and a speed setting circuit 13. The PID closed-loop feedback optimizes the trolley speed, thereby controlling the swing angle of the lifting rope. The control parameters are adaptively adjusted under different rope lengths, ensuring good anti-sway performance under various rope lengths, thus improving the crane's operational safety and work efficiency.

[0023] Furthermore, the frequency conversion regulating circuit 7 is connected to the stepless speed regulation circuit 14, the four-quadrant motion control circuit 15, the acceleration and deceleration control circuit 16, the current feedback circuit 17 and the frequency conversion speed regulation control circuit 18, and the protection monitoring circuit 5 is connected to the short circuit monitoring circuit 19, the overload monitoring circuit 20, the overvoltage monitoring circuit 21 and the overheat monitoring circuit 22.

[0024] Furthermore, the bus control circuit 2 is connected to the communication protocol circuit 3, which is connected to the anti-hook protection circuit 23, the brake monitoring and protection circuit 24, and the crane status protection circuit 25.

[0025] Furthermore, the output terminals of the variable frequency control circuit 7, which controls the stepless speed regulation circuit 14, the four-quadrant motion control circuit 15, the acceleration / deceleration control circuit 16, the current feedback circuit 17, and the variable frequency speed regulation control circuit 18, as well as the output terminals of the short circuit monitoring circuit 19, the overload monitoring circuit 20, the overvoltage monitoring circuit 21, and the overheat monitoring circuit 22, are electrically connected to the input terminal of the protection monitoring circuit 5.

[0026] Furthermore, the output terminals of the anti-hook protection circuit 23, the brake monitoring and protection circuit 24, and the crane status protection circuit 25 are electrically connected to the input terminal of the bus control circuit 2 through the communication protocol circuit 3.

[0027] Furthermore, the central frequency converter management circuit 4 is bidirectionally connected to the bus control circuit 2, the protection monitoring circuit 5, the frequency conversion adjustment circuit 7, and the anti-sway control circuit 8. The anti-sway control circuit 8 is bidirectionally connected to the PID feedback circuit 9, the load swing angle monitoring circuit 10, the speed correction circuit 11, the motor control circuit 12, and the speed setting circuit 13.

[0028] Its internal anti-sway module obtains the real-time swing angle of the suspended load, and based on the real-time swing angle and the feedback current obtained by the inverter's current acquisition module, it implements PID feedback control with a microcontroller chip program to realize motor operation and adapt to different working conditions on site.

[0029] Working Principle: This utility model includes a circuit board body 1, a bus control circuit 2, a communication protocol circuit 3, a central frequency converter management circuit 4, a protection and monitoring circuit 5, mounting holes 6, a frequency converter adjustment circuit 7, an anti-sway control circuit 8, a PID feedback circuit 9, a load swing angle monitoring circuit 10, a speed correction circuit 11, a motor control circuit 12, a speed setting circuit 13, a stepless speed regulation circuit 14, a four-quadrant motion control circuit 15, an acceleration / deceleration control circuit 16, a current feedback circuit 17, a frequency converter speed regulation control circuit 18, a short circuit monitoring circuit 19, an overload monitoring circuit 20, an overvoltage monitoring circuit 21, and an overcurrent monitoring circuit. The system includes a thermal monitoring circuit 22, an anti-slippage protection circuit 23, a brake monitoring and protection circuit 24, and a crane status protection circuit 25. The inverter's speed setting module receives the crane operation command, which includes a target speed. This target speed is used as the initial set speed and sent to the inverter's anti-sway module. The anti-sway module acquires the real-time swing angle of the suspended load and, based on the real-time swing angle and the feedback current obtained from the inverter's current acquisition module, corrects the set speed in real time. The real-time correction result is output to the inverter's motor control module. The motor control module drives the motor according to the real-time correction result. PID closed-loop feedback is used to optimize the trolley speed, thereby controlling the swing angle of the lifting rope. This allows for adaptive adjustment of control parameters under different rope lengths, ensuring good anti-sway performance and improving the crane's operational safety and work efficiency.

[0030] In addition to operating normally in various working environments, crane variable frequency speed control systems offer reliable protection against common faults such as short circuits, overloads, phase loss, locked rotors, overvoltage, and overheating. Crane lifting mechanisms are prone to hook slippage when lifting or stopping heavy loads. Corresponding solutions should be designed for anti-sway high-end intelligent frequency converter speed control systems.

[0031] Variable frequency speed control systems can achieve stepless speed regulation and four-quadrant movement. During acceleration or deceleration, the crane should meet smoothness requirements, have a sufficiently large speed range, and provide accurate positioning control. During constant torque low-speed operation, it should ensure stable speed and guarantee long-term safe and stable operation at the working point within the speed range.

[0032] It features anti-hook slippage protection, brake monitoring and brake fault protection, crane status display, and is designed with an internal bus control circuit and multiple communication protocols.

[0033] The variable frequency speed control system for cranes should meet the torque requirements under various working conditions, possess strong overload capacity, vector and torque control capabilities, and achieve high torque output. It should also have a closed-loop adjustment function with an encoder.

[0034] The PID control method is used as a strategy for anti-sway control of cranes, and this method has good robustness.

[0035] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A circuit board with anti-oscillation function, comprising a circuit board main body (1), characterized in that: The circuit board body (1) is equipped with a bus control circuit (2), a central frequency conversion management circuit (4), a protection monitoring circuit (5), a frequency conversion adjustment circuit (7), and an anti-sway control circuit (8). Mounting holes (6) are provided at the four corners of the circuit board body (1). The central frequency conversion management circuit (4) is connected to the protection monitoring circuit (5), the bus control circuit (2), the frequency conversion adjustment circuit (7), and the anti-sway control circuit (8). The anti-sway control circuit (8) is connected to a PID feedback circuit (9), a load swing angle monitoring circuit (10), a speed correction circuit (11), a motor control circuit (12), and a speed setting circuit (13).

2. The circuit board with anti-swing function according to claim 1, characterized in that: The frequency conversion regulation circuit (7) is connected to a stepless speed regulation circuit (14), a four-quadrant motion control circuit (15), an acceleration and deceleration control circuit (16), a current feedback circuit (17), and a frequency conversion speed regulation control circuit (18). The protection monitoring circuit (5) is connected to a short circuit monitoring circuit (19), an overload monitoring circuit (20), an overvoltage monitoring circuit (21), and an overheat monitoring circuit (22).

3. The circuit board with anti-oscillation function according to claim 1, characterized in that: The bus control circuit (2) is connected to a communication protocol circuit (3), and the communication protocol circuit (3) is connected to an anti-hook protection circuit (23), a brake monitoring and protection circuit (24), and a crane status protection circuit (25).

4. The circuit board with anti-swing function according to claim 2, characterized in that: The frequency conversion regulating circuit (7) controls the stepless speed regulation circuit (14), the four-quadrant motion control circuit (15), the acceleration and deceleration control circuit (16), the current feedback circuit (17), and the frequency conversion speed regulation control circuit (18). The output terminals of the short circuit monitoring circuit (19), the overload monitoring circuit (20), the overvoltage monitoring circuit (21), and the overheat monitoring circuit (22) are electrically connected to the input terminal of the protection monitoring circuit (5).

5. The circuit board with anti-oscillation function according to claim 3, characterized in that: The output terminals of the anti-slip hook protection circuit (23), brake monitoring protection circuit (24) and crane status protection circuit (25) are electrically connected to the input terminal of the bus control circuit (2) through the communication protocol circuit (3).

6. The circuit board with anti-oscillation function according to claim 1, characterized in that: The central frequency conversion management circuit (4) is bidirectionally connected to the bus control circuit (2), protection monitoring circuit (5), frequency conversion adjustment circuit (7) and anti-sway control circuit (8). The anti-sway control circuit (8) is bidirectionally connected to the PID feedback circuit (9), the load swing angle monitoring circuit (10), the speed correction circuit (11), the motor control circuit (12) and the speed setting circuit (13).

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