Multi-bus proportional valve amplifier with display control panel

Abstract

A multi-bus proportional valve amplifier with a display control panel comprises an amplifier main board, a proportional controller panel and a first fixing piece fixedly connected with the amplifier main board and the proportional controller panel. The amplifier mainboard comprises an analog quantity port, a digital communication interface, and a mainboard panel interface, a first dial switch and a second dial switch which are electrically connected with the digital communication interface respectively; the proportional controller panel comprises a display control panel and a fixed panel parallel to the display control panel; the display control panel comprises a panel screen, keys and a display control panel interface; the display control panel and the fixed panel are fixedly connected through a second fixing piece; and the mainboard panel interface is electrically connected with the display control panel interface. According to the utility model, the display state information is abundant, the real-time display and output can be effectively realized, the adjustment and modification of working parameters are convenient, under the control of multiple buses, the anti-interference capability and stability are improved, the control precision and flexibility are improved, the system expansion is convenient, the maintenance efficiency is optimized, the compatibility and standardization advantages are realized, and the cost is low.

Description

Technical Field

[0001] This utility model belongs to the technical field of electro-hydraulic control of proportional valve amplifiers, and in particular relates to a multi-bus proportional valve amplifier with a display and control panel. Background Technology

[0002] Currently, commonly used proportional valve amplifiers primarily use bi-color LED indicator lights to display their operating status or error alarm information. However, the color changes of bi-color indicator lights are extremely limited, and the information they can display about the amplifier's operating status is also limited. They are unable to effectively display real-time operating status information such as output current values, dithering frequency values, or complex error alarm messages. Furthermore, most commonly used proportional valve amplifiers use analog signals as input control signals. When the operating environment and parameters of the proportional valve amplifier need to be adjusted, users find it difficult to quickly, accurately, visually, quantitatively, and in batches modify the operating parameters. Manual adjustment and use are complex, cumbersome, and inconvenient.

[0003] When proportional valve amplifiers are used in a network, there is no multi-bus control. The control system needs to be equipped with an industrial computer or PLC controller to configure multiple analog output modules. Furthermore, the modification of the operating parameters and the monitoring of the operating status of each proportional valve amplifier must be carried out on-site with external equipment (such as a multimeter) for each individual proportional valve amplifier. When networking and integrating the system, there are many system components, complex connection combinations, unstable control and monitoring, poor reliability, and high assembly, disassembly and maintenance costs. It is difficult to meet the requirements of industrial automation applications, resulting in a poor user experience. Utility Model Content

[0004] This utility model provides a multi-bus proportional valve amplifier with a display and control panel to solve the problems of current proportional valve amplifiers, such as limited display status information, difficulty in effective real-time display and output, complex and cumbersome adjustment and modification of working parameters, lack of multi-bus control, poor stability and reliability of control and monitoring of proportional valve amplifiers during network integration, low control accuracy and flexibility, poor compatibility, inconvenient application and maintenance, high cost, and difficulty in meeting the industrial requirements for the digitalization and networking of hydraulic components.

[0005] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution.

[0006] This utility model provides a multi-bus proportional valve amplifier with a display and control panel. The multi-bus proportional valve amplifier includes: an amplifier main board, a proportional controller panel, and a first fixing member that fixes the amplifier main board and the proportional controller panel. The amplifier main board includes an analog port and a digital communication interface, and a main board panel interface and a DIP switch that are electrically connected to the digital communication interface. The proportional controller panel includes a display and control panel and a fixed panel parallel to it. The display and control panel includes a panel screen, buttons, and a display and control panel interface. The display and control panel and the fixed panel are fixedly connected by a second fixing member. The main board panel interface and the display and control panel interface are electrically connected.

[0007] As an optional implementation, the second fastener includes a copper column, a second bolt, and a second nut inside the copper column.

[0008] As an optional implementation, the amplifier motherboard has a microcontroller or digital signal processor, an electromagnet current sampling signal conditioning circuit, a control input analog signal conditioning circuit, a power drive circuit, a human-machine interface circuit, a parameter storage circuit, a bus communication circuit, and a power supply circuit on its front panel. The analog input port is electrically connected to the power supply circuit, the control input analog signal conditioning circuit, the electromagnet current sampling signal conditioning circuit, and the power drive circuit, respectively. The electromagnet current sampling signal conditioning circuit, the control input analog signal conditioning circuit, the power drive circuit, the human-machine interface circuit, the parameter storage circuit, and the bus communication circuit are electrically connected to the microcontroller or digital signal processor, respectively. The power supply circuit is electrically connected to the microcontroller or digital signal processor, the electromagnet current sampling signal conditioning circuit, the control input analog signal conditioning circuit, the power drive circuit, the human-machine interface circuit, the parameter storage circuit, and the bus communication circuit, respectively.

[0009] As an optional implementation, the fixed panel is provided with multiple openings, which are respectively equipped with a panel screen, buttons, digital communication interface, DIP switch, first fixing member and second fixing member.

[0010] As an optional implementation, the amplifier motherboard is further provided with a motherboard mounting slot, and the fixing panel is further provided with a panel fixing through hole. The first fixing member includes a first fixing member body with a motherboard fixing hole and a panel fixing hole, a first screw, and a first nut. The amplifier motherboard is fixed to the first fixing member by the motherboard mounting slot and the motherboard fixing hole through the first screw and the first nut. The fixing panel is fixed to the first fixing member by the panel fixing through hole and the panel fixing hole through the first screw and the first nut.

[0011] As an optional implementation, the analog port is a 32-pin connector.

[0012] As an optional implementation, the interface element of the digital communication interface is a first digital communication interface or / and a second digital communication interface with a male socket structure; or / and a third digital communication interface, wherein the third digital communication interface is a universal serial bus interface.

[0013] As an optional implementation, the motherboard panel interface is a through-hole female connector.

[0014] As an optional implementation, the DIP switch includes a first DIP switch and a second DIP switch; the first DIP switch is electrically connected to a first digital communication interface; and the second DIP switch is electrically connected to a second digital communication interface.

[0015] As an optional implementation, when the display and control panel is located on the lower surface of the fixed panel, the analog port is located at one edge of the amplifier motherboard, and the fixed panel is located at the other edge of the amplifier motherboard; the panel screen, buttons, digital communication interface, and DIP switch extend along multiple openings onto the surface of the fixed panel away from the amplifier motherboard.

[0016] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Based on the above technical solution, this utility model has at least one of the following advantages and effects:

[0017] I. The present invention provides a multi-bus proportional valve amplifier with a display and control panel, comprising: an amplifier main board, a proportional controller panel, and a first fixing member for fixing the amplifier main board and the proportional controller panel; the amplifier main board includes an analog port and a digital communication interface, and a main board panel interface and a DIP switch respectively electrically connected to the digital communication interface; the proportional controller panel includes a display and control panel and a fixed panel parallel to it; the display and control panel includes a panel screen, buttons, and a display and control panel interface; the display and control panel and the fixed panel are fixedly connected by a second fixing member; the main board panel interface and the display and control panel interface are electrically connected. This utility model's amplifier motherboard is a digital improvement on the analog control method. It adds a CAN bus and RS-485 interface, a debugging communication interface, and a display panel, along with a text display screen and interactive buttons. This allows users to adjust and control the proportional valve via analog control signals through the analog port, and also obtain the operating status information of the multi-bus proportional valve amplifier on-site through the display panel screen. Users can also set the control mode and operating parameters of the multi-bus proportional valve amplifier through the buttons. After switching the multi-bus proportional valve amplifier to digital communication control mode, users can remotely batch set the operating parameters of the multi-bus proportional valve amplifier and control and modify its operating status through the digital communication interface. This effectively simplifies the components of traditional proportional valve amplifiers, such as analog modules and communication modules, reducing the difficulty of structural design and network integration in application scenarios. It improves the stability and reliability of multi-bus proportional valve amplifiers with display panels used in network integration during control, modification, and monitoring. Maintenance is convenient, costs are reduced, and it is more adaptable to the requirements of industrial automation development, enriching application scenarios and enhancing the user experience.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above-mentioned structure and other objects, features and advantages of this utility model more obvious and understandable, the following preferred embodiments are provided in conjunction with the accompanying drawings for detailed description. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the multi-bus proportional valve amplifier according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a multi-bus proportional valve amplifier according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a multi-bus proportional valve amplifier according to another embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the circuit structure of a multi-bus proportional valve amplifier according to an embodiment of the present invention.

[0023] Explanation of icon numbers:

[0024] 1: Amplifier Mainboard 11: Analog Port

[0025] 12: Debugging communication interface 13: Motherboard panel interface

[0026] 14: Motherboard mounting slot 2: Proportional controller panel

[0027] 21: Display and Control Panel 211: Panel Screen

[0028] 212: Buttons 213: Display / Control Panel Interface

[0029] 22: Fixed panel 221: Panel fixing through hole

[0030] 3: First fastener 31: Main body of the first fastener

[0031] 32: First screw; 33: First nut

[0032] 4: Second fastener 41: Copper pillar

[0033] 42: Second bolt; 43: Second nut

[0034] 51: First DIP switch 52: Second DIP switch

[0035] 61: CAN bus interface 62: RS-485 bus interface Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended purpose of the invention, the following detailed description of the specific implementation methods, structures, features and effects of this utility model, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0037] This utility model provides a multi-bus proportional valve amplifier with a display and control panel, such as... Figures 1 to 3 As shown, the multi-bus proportional valve amplifier includes: an amplifier main board 1, a proportional controller panel 2, and a first fixing member 3 for fixing the amplifier main board 1 and the proportional controller panel 2. The amplifier main board 1 is located on the side of the proportional controller panel 2 without any external markings. The amplifier main board 1 can be a 100mm × 160mm printed circuit board (PCB). The amplifier main board 1 includes an analog port 11 and a digital communication interface, a main board panel interface 13, and DIP switches.

[0038] In this utility model, in order to facilitate debugging, the amplifier PCB motherboard 1 also includes a third digital communication interface, such as a debugging communication interface 12, which is used to monitor the working status of the multi-bus proportional valve amplifier and modify the working parameters of the multi-bus proportional valve amplifier by adding a USB serial port.

[0039] In this invention, the analog port 11 is a 32-pin plug, which can be a 32-pin plug with a European-style socket connection (DIN41612 32-pin plug). The analog port 11 of this 32-pin plug supports analog signal input and output across multiple channels, enabling simultaneous and coordinated processing of multiple signal inputs and outputs. It also exhibits strong anti-interference capabilities, effectively reducing mutual interference between channels. For example, the analog quantities that can be transmitted through this 32-pin plug may include 4–20mA current, 0–10V voltage, and 0–5V voltage. This 32-pin plug features high-precision analog input and output functions, providing high-resolution data acquisition and processing capabilities, and can handle high-precision analog signals.

[0040] In this invention, the interface element of the digital communication interface is a first digital communication interface and / or a second digital communication interface with a socket structure. The socket structure can be a terminal socket with a size parameter of 1×3Pin. The digital communication interface may have only a first digital communication interface (such as a CAN bus interface 61), or only a second digital communication interface (such as an RS-485 bus interface 62); or the digital communication interface may also include a first digital communication interface and a second digital communication interface, wherein there may be multiple first and second digital communication interfaces, which is not limited here. When there are multiple second digital communication interfaces, the spacing between adjacent digital communication interface physical layer devices is at least 2.54mm to ensure that they are not interfered with each other. For example, the first digital communication interface can be a CAN bus interface 61, and the second digital communication interface can be an RS-485 bus interface 62 supporting the Modbus serial communication protocol.

[0041] In this invention, the CAN bus interface 61 and the RS-485 bus interface 62 supporting the Modbus protocol can remotely set and control the operating parameters of the multi-bus proportional valve amplifier with display and control panel 21 through the object dictionary broadcast method of the CAN protocol or the batch modification method of the Modbus register. The output current value of the multi-bus proportional valve amplifier can be controlled or monitored in real time through the CAN bus and RS-485 bus.

[0042] In this invention, the debugging communication interface 12 can be configured as a Universal Serial Bus (USB) interface. Specifically, its physical layer device can be further configured as a miniature USB connector. This USB connector is used for debugging and monitoring the operating status information of the multi-bus proportional valve amplifier.

[0043] In this invention, the motherboard panel interface 13 is a through-hole female connector. There can be one or more through-hole female connectors. When there is only one through-hole female connector, the distance between it and the adjacent interface is at least 2.0 mm. When there are multiple through-hole female connectors, the distance between them is at least 2.0 mm to avoid signal interference between adjacent interfaces, thereby ensuring the stability and security of signal transmission from the motherboard panel interface 13.

[0044] In this invention, when the CAN bus is in operation, it includes a terminating resistor mode and a no-terminating resistor mode. The DIP switches include a first DIP switch 51 and a second DIP switch 52. The first DIP switch 51 is a DIP switch for adjusting the CAN terminating resistor, used to connect and disconnect the terminating resistor on the CAN bus. Similarly, when the RS-485 bus is in operation, it also includes a terminating resistor mode and a no-terminating resistor mode. The second DIP switch 52 is a DIP switch for adjusting the RS-485 terminating resistor, used to connect and disconnect the RS-485 terminating resistor. Both the CAN terminating resistor and the RS-485 terminating resistor can be set to 120Ω terminating resistors on the corresponding buses. The first DIP switch 51 and the second DIP switch 52 are 2.54mm apart from adjacent communication interfaces and are single-contact (1-pin) DIP switches. The 1-pin first DIP switch 51 is electrically connected in series with the CAN bus interface 61; the 1-pin second DIP switch 52 is electrically connected in series with the RS-485 bus interface 62. For example, the 1-pin first DIP switch 51 is electrically connected in series with the CAN bus interface and controls the connection and disconnection of the CAN bus interface 61 terminating resistor; the 1-pin second DIP switch 52 is electrically connected in series with the RS-485 bus interface 62 supporting the Modbus protocol and controls the connection and disconnection of the RS-485 bus interface 62 terminating resistor (see...). Figures 1 to 3 ).

[0045] In this utility model, the amplifier motherboard 1 has a microcontroller or digital signal processor, an electromagnet current sampling signal conditioning circuit, a control input analog signal conditioning circuit, a power drive circuit, a human-machine interface circuit, a parameter storage circuit, a CAN bus communication circuit, a debugging serial port communication circuit, an RS-485 bus communication circuit, and a power supply circuit on its panel surface; such as Figure 4As shown, the electromagnet current sampling signal conditioning circuit, control input analog signal conditioning circuit, power drive circuit, human-machine interface circuit, parameter storage circuit, CAN bus communication circuit, debugging serial port communication circuit, and RS-485 bus communication circuit are electrically connected to the microcontroller module or digital signal processor module, respectively. The power supply circuit sequentially supplies power to the aforementioned microcontroller or digital signal processor, electromagnet current sampling signal conditioning circuit, control input analog signal conditioning circuit, power drive circuit, human-machine interface circuit, parameter storage circuit, CAN bus communication circuit, debugging serial port communication circuit, and RS-485 bus communication circuit.

[0046] In this invention, for example, the microcontroller module can be an STMicroelectronics STM32F407VET6 MCU module. This MCU module internally includes a pulse width modulation (PWM) output unit, an analog-to-digital converter (ADC), a serial communication unit, a CAN communication unit, an I2C communication unit, I / O units, and main logic unit peripheral hardware resources. Figure 4 As shown, the PWM output unit of the STM32F407VET6 MCU module is electrically connected to the power drive circuit. The PWM output unit outputs a PWM wave according to the MCU's internal software logic. The power drive circuit can provide output to the controlled proportional valve through analog port 11. The controlled proportional valve forms a complete drive loop from the electromagnet current feedback signal conditioning circuit through analog port 11. The electromagnet current feedback signal conditioning circuit is electrically connected to the ADC unit of the STM32F407VET6 MCU module. After conversion by the IV (current to voltage) module, the MCU can obtain the drive data of the controlled proportional valve in real time. The control input analog signal conditioning circuit receives external analog signal control quantities (including analog signals of 0~10V / 0~5V / 4~20mA) through analog port 11 and is electrically connected to the ADC unit of the STM32F407VET6 MCU module. After VI conversion, the MCU can obtain the specific value of the analog signal control quantity in real time. The human-machine interface circuit includes... The system includes a display and control panel, a human-machine interface circuit electrically connected to the I / O unit of the MCU module to receive on-site human-machine interaction information; a parameter storage circuit electrically connected to the I2C communication unit of the STM32F407VET6 MCU module; in addition, a CAN bus communication circuit electrically connected to the CAN communication unit of the STM32F407VET6 MCU module, a debug serial port communication circuit electrically connected to the serial port communication unit of the STM32F407VET6 MCU module, and an RS-485 bus communication circuit electrically connected to the serial port communication unit of the STM32F407VET6 MCU module. This constitutes the hardware foundation of a multi-bus proportional valve amplifier with a display and control panel.

[0047] In this invention, the operation of the multi-bus proportional valve amplifier with a display and control panel is mainly related to three types of data. The first type of data consists of operating parameters, including dither frequency, maximum output current, minimum output current, ramp rise time, ramp fall time, amplifier address, and control signal type. These parameters form the basis for the normal operation of the multi-bus proportional valve amplifier with a display and control panel. They are preset according to different operating scenarios and proportional valve models, and include dither frequency, maximum output current, minimum output current, ramp rise time, ramp fall time, amplifier address, and control signal type, which are treated as constants in the program logic calculations.

[0048] Secondly, the second type of data is control command data. For multi-bus proportional valve amplifiers with display and control panels, this refers to the real-time changing values ​​obtained by conditioning, conversion, or parsing external analog signal control quantities or CAN bus communication, RS-485 bus communication, and debugging serial port communication. These values ​​are used as variables in the program logic for calculation.

[0049] In addition, the third type of data is operating status information, including the real-time output current value of the multi-bus proportional valve amplifier with a display and control panel when driving the controlled proportional valve, as well as any alarm information that the amplifier may display. This third type of data represents operating status information and is the result of a relationship constructed based on the operating parameters (first type of data) and the control command data (second type of data).

[0050] In this invention, the STM32F407VET6 MCU module primarily constructs and calculates the linear functional relationship between the operating parameters (dizziness frequency, maximum output current, minimum output current, ramp rise time, ramp fall time, amplifier address, and control signal type) and control command data of a multi-bus proportional valve amplifier with a display and control panel, as well as the amplifier output drive current. In the linear functional relationship of the amplifier output current value, the operating parameters can be constants, the control command data can be the independent variable, and the amplifier output drive current can be the dependent variable. For example, when the analog signal control quantity is 0–10V, as the analog signal control quantity changes within the range of 0–10V, the amplifier output drive current changes from the minimum output current to the maximum output current; when the analog signal control quantity changes within the range of 10–0V, the amplifier output drive current changes from the maximum output current to the minimum output current, and the delay patterns of the current rise and fall conform to the settings for ramp rise time and ramp fall time in the operating parameters.

[0051] In this invention, the multi-bus proportional valve amplifier with display and control panel is equipped with a display and control panel 21 composed of human-machine interface circuitry. This display and control panel 21 allows for online modification of operating parameters via a Chinese menu and keypad operation, based on human-machine interface program logic. It also works with memory read / write program logic to write the operating parameters into memory for later logical reading and modification. Furthermore, real-time operating status information, including the real-time output current value of the proportional valve amplifier when driving the controlled proportional valve, and any alarm information that may occur, can be displayed on the display and control panel 21.

[0052] In this invention, the CAN bus communication circuit, RS-485 bus communication circuit, and debugging serial port communication circuit of the multi-bus proportional valve amplifier with display and control panel can all achieve functions similar to those of the display and control panel 21, namely, online modification of amplifier operating parameters and display of amplifier operating status information. In addition, the CAN bus communication circuit, RS-485 bus communication circuit, and debugging serial port communication circuit can also send control command data to the amplifier, enabling the amplifier to output drive current to the controlled proportional valve in a linear relationship.

[0053] In this invention, the CAN bus communication circuit can transmit working status information, control command data, and working parameters; the RS-485 bus communication circuit can transmit working status information, control command data, and working parameters; and the debugging serial port communication circuit can transmit working status information, control command data, and working parameters.

[0054] In this invention, the debugging serial communication circuit adopts a USB-to-serial converter and supports the Modbus protocol. When using a standard USB 2.0 shielded cable, its theoretical maximum transmission distance is only 5 meters, making it suitable for standalone debugging.

[0055] In this invention, both the CAN bus communication circuit and the RS-485 bus communication circuit use twisted-pair differential signals at the physical layer, which can effectively suppress electromagnetic interference. The CAN bus can achieve a maximum transmission distance of 10 kilometers at a rate of 5 kbps, and the RS-485 bus can achieve a transmission distance of 1.2 kilometers at a rate of 100 kbps.

[0056] In this invention, when using the CAN bus communication protocol or RS-485 communication / debugging serial port communication that supports the Modbus protocol, each amplifier address is unique (Modbus slave address, CAN node ID), ensuring the uniqueness of communication to each amplifier.

[0057] In this invention, the CAN bus communication protocol adopts the standard CANopen protocol or a custom application layer protocol, supporting linear topology and multi-machine collaborative multi-master communication. By defining a parameter read / write object dictionary, the operating parameter information, operating status information, and control command data of the defined proportional valve amplifier can be mapped accordingly. Users can broadcast via the CAN bus and send global parameters (such as operating parameter information, operating status information, and control command data) through process data objects (PDOs). The RS-485 bus communication and debugging serial port communication circuit adopts the Modbus protocol. This bus has a master-slave architecture, supporting multi-machine collaborative networking. The master control device (usually a PLC / PC) controls multiple slave amplifiers through polling or broadcasting. The Modbus protocol maps global parameters (such as operating parameter information, operating status information, and control command data) to Modbus register addresses through standard function codes. Examples include defining a maximum current value register, a minimum current value register, a stored parameter register, and a control command value register. Therefore, the physical layer and protocol application of CAN bus communication and RS-485 bus communication enable the above two bus interfaces to remotely control the drive current of amplifiers, set operating parameters, and use them in network applications in actual field use scenarios. Debugging serial communication circuits is more suitable for stand-alone debugging operations.

[0058] This invention introduces a display and control panel, which allows for the modification of amplifier operating parameters and the reading back of amplifier operating status information through a user-friendly interface, significantly optimizing the amplifier debugging process and improving the user experience.

[0059] This invention introduces multi-bus technology (RS-485 bus and CAN bus) into a traditional proportional amplifier to improve anti-interference capability and signal stability. The RS-485 and CAN buses use differential signal transmission, which effectively suppresses common-mode interference and reduces signal attenuation during long-distance transmission. Compared to analog signals, which are susceptible to electromagnetic noise (such as high-frequency interference from frequency converters), the digital bus significantly improves system stability. The digital bus can achieve reliable data transmission through protocol verification (such as Modbus's CRC check and CAN's ACK confirmation mechanism), avoiding excessive control errors caused by line resistance or voltage fluctuations in analog signals.

[0060] This invention can send 16-bit or higher precision digital commands (such as current setting values) through the aforementioned bus, surpassing the control precision of traditional 0-10V analog quantities (usually corresponding to 10-12 bit ADC resolution); it also supports the simultaneous modification of complex operating parameters such as PID parameters and ramp time through the aforementioned bus, without relying on external potentiometers or multiple analog signal inputs, significantly enhancing control precision and flexibility.

[0061] In this invention, from the perspective of system expansion and maintenance efficiency optimization, the RS-485 bus supports 32-node cascading, and the CAN bus supports a multi-master architecture, facilitating the construction of a distributed control system and enabling centralized control of multiple proportional valves or devices. Amplifier status (such as drive circuit values ​​and fault codes) can be read in real time via the bus, and online firmware upgrades are supported, reducing on-site maintenance costs. This invention has significant compatibility and standardization advantages. For example, Modbus and CANOpen are both common industrial protocols that can be directly connected to PLCs, DCSs, and other upper-level control systems, avoiding the development costs of dedicated interfaces. Furthermore, it provides the underlying communication foundation for subsequent integrated Industrial Internet of Things (IIoT) functions (such as cloud data monitoring).

[0062] This invention also has the advantage of balancing cost and reliability. Compared with traditional analog amplifiers, it reduces a large number of dedicated analog signal circuits (such as filters and isolation amplifiers), thereby reducing the complexity of the PCB and material costs. Furthermore, the bus can, in the event of a communication interruption, implement a preset safety strategy based on the amplifier (such as maintaining the last valid value or entering a safe state), thus avoiding the risk of loss of control due to analog signal disconnection.

[0063] In this invention, the introduction of RS-485 and CAN bus realizes the transformation of overflow valve control from single signal drive to intelligent digital control, comprehensively improving the system's anti-interference ability, control accuracy and maintainability, and meeting the requirements of Industry 4.0 for the digitalization and networking of hydraulic components.

[0064] In this invention, the proportional controller panel 2 includes a display panel 21 and a fixed panel 22 parallel to it. The fixed panel 22 is a panel structure with dimensions of 128mm × 40mm × 2mm, and its material is aluminum alloy.

[0065] In this invention, the display control panel 21 can be located on the side away from the amplifier main board 1 and fixed to the outward side of the fixing panel 22 (not shown in the figure).

[0066] In this invention, the fixed panel 22 has multiple openings, which correspond to the mounting of the panel screen 211, buttons 212, bus interface, DIP switch, debugging communication interface 12, and first fixing member 2 and second fixing member 4. These openings may correspond to fixing holes in the first fixing member 2 and second fixing member 4. The openings can be a large window or multiple openings corresponding to the size of the panel screen 211, buttons 212, bus interface, DIP switch, and debugging communication interface 12. Furthermore, the openings also include fixing holes in the first fixing member 2 and second fixing member 4, which can be through holes.

[0067] In this invention, the display control panel 21 can be an OLED display control panel, and its size can be set to a panel structure of 37mm × 36.2mm. The display control panel 21 includes a panel screen 211, buttons 212, and a display control panel interface 213. The panel screen 211 can be an OLED screen, and the display control panel interface 213 can be an OLED display control panel interface. The buttons 212 can be multiple surface-mount tactile switches. The display control panel 21 uses a 0.96-inch, 128*64 resolution screen, driven by an OLED display driver chip (SSD1306). Three surface-mount tactile switches are evenly spaced below the panel screen 211 to form the main on-site human-machine interface. The back of the OLED display control panel has an OLED display control panel interface, whose physical layer components can be set to 2×5pin 2.0mm pitch surface-mount bent pin connectors. The motherboard panel interface 13 can be set to a 2×5pin 2.0mm pitch female connector. The motherboard panel interface 13 is electrically connected to the OLED display control panel interface, which in turn forms a mechanical connection between the OLED display control panel and the fixed panel 22. This structural design satisfies both the electrical connection between the OLED display control panel and the amplifier motherboard, enabling the interaction of electrical signals, and ensures the strength and stability of the mechanical connection. Users can observe the operating data of the multi-bus proportional valve amplifier on-site via the OLED display control panel, and set the control mode and operating parameters of the multi-bus proportional valve amplifier using button 212. After switching to bus control mode, users can also remotely batch set the amplifier operating parameters mapped in the CAN communication protocol user dictionary and RS-485 bus Modbus register via the CAN bus or an RS-485 bus supporting the Modbus protocol. Alternatively, users can dynamically change the amplifier's output drive current by modifying the mapping values ​​of amplifier control command data in the CAN user dictionary and Modbus register.

[0068] In this invention, the display control panel 21 and the fixed panel 22 are fixedly connected by a second fastener 4. Figure 2 As shown, the second fixing component 4 includes a copper pillar 41, a second bolt 42, and a second nut 43 inside the second bolt 42 of the copper pillar 41. The second bolt 42, the fixing panel 22, the copper pillar 41, and the second nut 43 of the display and control panel 21 are sequentially fixed together. As an optional embodiment, the copper pillar 41 is a hexagonal copper pillar used to support and fix the display and control panel 21 and the fixing panel 22. The hexagonal copper pillar is perpendicular to both the display and control panel 21 and the fixing panel 22. The motherboard panel interface 13 and the display and control panel interface 213 are electrically connected, allowing the display and control panel interface 213 to display data transmitted from the motherboard panel interface 13 to the display and control panel interface 213 in real time, and then displayed externally through the panel screen 211 of the display and control panel 21.

[0069] In this utility model, such as Figure 1 and Figure 2 As shown, the amplifier motherboard 1 is also provided with a motherboard mounting slot 14, and the fixed panel 22 is also provided with a panel fixing through hole 221. The first fixing member 3 includes a first fixing member body 31 with a motherboard fixing hole and a panel fixing hole, a first screw 32, and a first nut 33. The amplifier motherboard 1 is fixed to the first fixing member 3 by the motherboard mounting slot 14 and the motherboard fixing hole through the first screw 32 and the first nut 33. The fixed panel 22 is fixed to the first fixing member 3 by the panel fixing through hole 221 and the panel fixing hole through the first screw 32 and the first nut 33. Among them, the panel fixing through hole 221 is a through hole on the fixed panel 22, which is located near both ends of the fixed panel 22 along the length of the body.

[0070] In this invention, when the display and control panel 21 is located between the amplifier motherboard 1 and the fixed panel 22, such as when the display and control panel 21 is located on the lower surface of the fixed panel 22, the analog port 11 is located at one edge of the amplifier motherboard 1, and the fixed panel 22 is located at the other edge of the amplifier motherboard 1. The panel screen 211, buttons 212, CAN bus interface 61, RS-485 bus interface 62, debugging communication interface 12, and DIP switches extend along multiple openings on the surface of the fixed panel 22 away from the amplifier motherboard 1. For example, the panel screen 211, buttons 212, CAN bus interface 61, RS-485 bus interface 62, debugging communication interface 12, first DIP switch 51, and second DIP switch 52 extend to corresponding positions on the openings of the fixed panel 22. As an optional implementation, the openings of the control panel 21 are respectively provided as functional openings for the panel screen 211, button 212, CAN bus interface 61, RS-485 bus interface 62, debugging communication interface 12, first DIP switch 51 and second DIP switch 52, and the markings are printed on the outer surface of the fixed panel 22 next to them.

[0071] In this utility model, such as Figure 1As shown, the multi-bus proportional valve amplifier of this invention can be used to control external proportional valve electromagnets. Based on the input analog control signal or RS-485 bus / CAN bus command information, the multi-bus proportional valve amplifier provides an appropriate drive current to the proportional valve electromagnet to achieve stepless regulation of the fluid flow and pressure controlled by the system with the multi-bus proportional valve amplifier, ensuring stable system operation. The proper functioning of the proportional valve electromagnet depends on the operating status of the multi-bus proportional valve amplifier. If a control system using the multi-bus proportional valve amplifier of this invention is employed, the operating status information (such as output current value or fault alarm information) of the multi-bus proportional valve amplifier can be monitored in real time, either on-site or remotely. This allows for timely adjustment or correction of parameters such as the chatter frequency, maximum output current, minimum output current, ramp-up time, and ramp-down time of the multi-bus proportional valve amplifier according to different system characteristics, ensuring the normal and stable operation of the control system.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A multi-bus proportional valve amplifier with a display and control panel, characterized in that, This multi-bus proportional valve amplifier includes: Amplifier main board (1), proportional controller panel (2), and a first fastener (3) for fixing the amplifier main board (1) and proportional controller panel (2); The amplifier motherboard (1) includes an analog port (11) and a digital communication interface, as well as a motherboard panel interface (13) and a DIP switch that are electrically connected to the digital communication interface respectively; The proportional controller panel (2) includes a display panel (21) and a fixed panel (22) parallel to it; The display control panel (21) includes a panel screen (211), buttons (212), and a display control panel interface (213); The display control panel (21) and the fixed panel (22) are fixedly connected by a second fastener (4); The motherboard panel interface (13) and the display control panel interface (213) are electrically connected.

2. The multi-bus proportional valve amplifier according to claim 1, characterized in that, The second fastener (4) includes a copper column (41), a second bolt (42), and a second nut (43) of the second bolt (42) inside the copper column (41).

3. The multi-bus proportional valve amplifier according to claim 1, characterized in that, The amplifier motherboard (1) has a microcontroller or digital signal processor, an electromagnet current sampling signal conditioning circuit, a control input analog signal conditioning circuit, a power drive circuit, a human-machine interface circuit, a parameter storage circuit, a bus communication circuit and a power supply circuit on its panel. The analog port (11) is electrically connected to the power supply circuit, the control input analog signal conditioning circuit, the electromagnet current sampling signal conditioning circuit, and the power drive circuit, respectively. The electromagnet current sampling signal conditioning circuit, the control input analog signal conditioning circuit, the power drive circuit, the human-machine interface circuit, the parameter storage circuit, and the bus communication circuit are electrically connected to the microcontroller or digital signal processor, respectively. The power supply circuit is electrically connected to the microcontroller or digital signal processor, the electromagnet current sampling signal conditioning circuit, the control input analog signal conditioning circuit, the power drive circuit, the human-machine interface circuit, the parameter storage circuit, and the bus communication circuit.

4. The multi-bus proportional valve amplifier according to claim 1, characterized in that, The fixed panel (22) has multiple openings, which are respectively equipped with a panel screen (211), a button (212), a digital communication interface, a DIP switch, a first fixing member (3) and a second fixing member (4).

5. The multi-bus proportional valve amplifier according to claim 4, characterized in that, The amplifier motherboard (1) is also provided with a motherboard mounting slot (14), and the fixed panel (22) is also provided with a panel fixing through hole (221). The first fixing member (3) includes a first fixing member body (31) with a motherboard fixing hole and a panel fixing hole, a first screw (32) and a first nut (33). The amplifier motherboard (1) is fixed to the first fixing member (3) by the motherboard mounting slot (14) and the motherboard fixing hole through the first screw (32) and the first nut (33); The fixed panel (22) is fixed to the first fixing member (3) by the panel fixing through hole (221) and the panel fixing hole through the first screw (32) and the first nut (33).

6. The multi-bus proportional valve amplifier according to any one of claims 1 to 3, characterized in that, The analog port (11) is a 32-pin connector.

7. The multi-bus proportional valve amplifier according to any one of claims 1 to 3, characterized in that, The interface element of the digital communication interface is a first digital communication interface and / or a second digital communication interface with a male socket structure; Or / and a third digital communication interface, wherein the third digital communication interface is a universal serial bus interface.

8. The multi-bus proportional valve amplifier according to any one of claims 1 to 3, characterized in that, The motherboard panel interface (13) is a direct-plug female connector.

9. The multi-bus proportional valve amplifier according to any one of claims 1 to 3, characterized in that, The DIP switch includes a first DIP switch (51) and a second DIP switch (52); The first DIP switch (51) is electrically connected to the first digital communication interface; The second DIP switch (52) is electrically connected to the second digital communication interface.

10. The multi-bus proportional valve amplifier according to any one of claims 4 to 5, characterized in that, When the display control panel (21) is located on the lower surface of the fixed panel (22), The analog port (11) is located on one edge of the amplifier main board (1), and the fixed panel (22) is located on the other edge of the amplifier main board (1); The panel screen (211), buttons (212), digital communication interface, and DIP switch extend along multiple openings on the surface of the fixed panel (22) away from the amplifier motherboard (1).

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