Control device compatible with servo motor regulating valve and stepping motor regulating valve

Abstract

The invention belongs to the technical field of valve control, and particularly relates to a control device compatible with a servo motor adjusting valve and a stepping motor adjusting valve. The device is characterized in that a servo driver module and a stepping driver module are connected with a processor module to form closed-loop control; the servo driver module and the stepping driver module are respectively used for driving and communicating a servo motor regulating valve and a stepping motor regulating valve, and the device can work in a servo motor regulating valve working mode or a stepping motor regulating valve working mode through switching of embedded software working modes of the processor module; the processor module is connected with a process control system through the communication interface module and used for controlling the servo driver module to drive or the stepping driver module according to a valve opening signal sent by the process control system. The device unifies two controller signal interfaces, installation modes, operation interfaces and operation methods, unifies operation maintenance processes and overhaul procedures, and realizes cost reduction and efficiency improvement.

Description

Technical Field

[0001] This application belongs to the field of valve control technology, specifically relating to a control device compatible with servo motor regulating valves and stepper motor regulating valves. Background Technology

[0002] Uranium enrichment plants rely primarily on staged regulation using electrically operated control valves to ensure continuous and stable material transfer within their pipeline systems. Currently, online electrically operated control valves are categorized into servo motor control valves and stepper motor control valves, with corresponding servo motor controllers and stepper motor controllers. However, the system operates a large number of servo motor and stepper motor control valves, but because their actuator motors differ in type, the corresponding servo motor controllers and stepper motor controllers are not interchangeable. This necessitates two different sets of operation, maintenance, and repair procedures, increasing system maintenance costs. Summary of the Invention

[0003] The purpose of this application is to provide a control device compatible with servo motor regulating valves and stepper motor regulating valves, which solves the problem that in the prior art, servo motor controllers and stepper motor controllers are not interchangeable, requiring two different sets of operation and maintenance processes and repair procedures, which increases the system operation and maintenance costs.

[0004] The technical solution to achieve the purpose of this application is as follows:

[0005] This application provides a control device compatible with servo motor regulating valves and stepper motor regulating valves. The device includes: a processor module, a servo driver module, a stepper driver module, and a communication interface module.

[0006] Both the servo driver module and the stepper driver module are connected to the processor module to form a closed-loop control.

[0007] The servo driver module and the stepper driver module are used for driving and communicating with the servo motor regulating valve and the stepper motor regulating valve, respectively. By switching the embedded software working mode of the processor module, the device can work in either the servo motor regulating valve working mode or the stepper motor regulating valve working mode.

[0008] The processor module is connected to the process control system through the communication interface module. It is used to control the servo driver module to drive the servo motor regulating valve to open or close, or to control the stepper driver module to drive the stepper motor regulating valve to open or close, based on the valve opening signal sent by the process control system. The processor module then feeds back the adjusted opening value to the process control system through the communication interface module.

[0009] Optionally, the processor module is specifically used for:

[0010] Upon receiving the valve opening signal, the PID software algorithm is invoked to convert the valve opening signal into a step adjustment signal for the servo motor regulating valve, which is then sent to the servo motor regulating valve through the servo driver module to execute the valve opening or closing action.

[0011] Alternatively, upon receiving the valve opening signal, a PID software algorithm is invoked to convert the valve opening signal into a step distance adjustment signal for the stepper motor regulating valve, which is then sent to the stepper motor regulating valve via the stepper motor driver module to execute the valve opening or closing action.

[0012] Optionally, the processor module specifically includes two operating modes: a PID control mode following the process control system and an independent PID control mode;

[0013] When operating in the PID control mode of the process control system, the current real-time valve target opening signal output by the process control system is received through the communication interface module and used as the valve opening signal;

[0014] When operating in the independent PID control mode, the pressure control target setpoint output by the process control system is received through the communication interface module. Based on the upstream and downstream pressure values ​​of the target valve, the opening value of the target valve and the required adjustment step are calculated using an embedded PID algorithm, which serves as the valve opening signal. The target valve is either the servo motor control valve or the stepper motor control valve.

[0015] Optionally, when operating in the independent PID control mode, PID control is performed according to the following formula:

[0016]

[0017] In the formula, u is the adjustment step size, k is the sampling number, Kp is the proportional gain, e is the deviation between the controlled variable and the given value, and T is the sampling period. i Let T be the integration time constant. D is the differential time constant.

[0018] Optionally, the device further includes: a temperature monitoring module and a fault alarm module;

[0019] The temperature monitoring module is used to monitor the temperature of the servo motor regulating valve and the stepper motor regulating valve. When the temperature of the servo motor regulating valve or the stepper motor regulating valve exceeds the alarm setting limit, the module sends the corresponding fault alarm information to the fault alarm module.

[0020] The fault alarm module transmits the fault alarm information to the process control system.

[0021] Optionally, the device further includes: a display screen communication module;

[0022] The display screen communication module is connected to the processor module and is used to receive the user's control setting signal and send the control setting signal to the processor module.

[0023] Optionally, the device further includes: a human infrared monitoring module;

[0024] The human infrared monitoring module is connected to the display screen communication module and is used to control the display screen communication module to light up when a moving infrared object is detected; and to control the display screen communication module to turn off when no moving infrared object is detected within a preset time period.

[0025] Optionally, the communication interface module includes three signal interfaces: Ethernet, RS485, and 4-20mA.

[0026] Optionally, the processor module has a main frequency of 180MHz, a Flash memory of 1024K, an SRAM capacity of 256K, and includes: 140 I / O ports, 8 serial ports, 6 SPI interfaces, 14 timers, 2 CAN communication interfaces, and 1 Ethernet core module.

[0027] Optionally, the device further includes: a power module;

[0028] The power supply module is used to provide operating power to the servo driver module, the stepper driver module, and the processor module.

[0029] The beneficial technical effects of this application are as follows:

[0030] This application provides a control device compatible with servo motor regulating valves and stepper motor regulating valves, including: a processor module, a servo driver module, a stepper driver module, and a communication interface module; both the servo driver module and the stepper driver module are connected to the processor module to form a closed-loop control; the servo driver module and the stepper driver module are respectively used for driving and communicating with the servo motor regulating valve and the stepper motor regulating valve; by switching the embedded software working mode of the processor module, the device can operate in either the servo motor regulating valve working mode or the stepper motor regulating valve working mode; the processor module is connected to the process control system through the communication interface module, and is used to control the servo driver module to drive the opening and closing action of the servo motor regulating valve, or to control the stepper driver module to drive the opening and closing action of the stepper motor regulating valve, according to the valve opening signal sent by the process control system, and to feed back the adjusted opening value to the process control system through the communication interface module. In terms of functionality and performance, the embodiments of this application meet the pressure and flow regulation methods and parameter indicators of two electric regulating valves; in terms of appearance, they unify the signal interfaces, installation methods, operation interfaces, and operation methods of the two controllers, and unify the operation and maintenance process and repair procedures; in terms of cost, they reduce the number of controller spare parts and accessories, thereby achieving cost reduction and efficiency improvement; and they optimize and improve the hardware and software of existing servo and stepper motor regulating valve controller devices. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a control device for a servo motor regulating valve and a stepper motor regulating valve, provided in an embodiment of this application. Detailed Implementation

[0032] To enable those skilled in the art to better understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] To address the problems of existing technologies, this application provides a controller device for servo and stepper motor-driven electric regulating valves in uranium enrichment plants. It fully analyzes the hardware and software characteristics of both servo and stepper motor controllers and proposes a modular design approach for the motor driver hardware circuit and software programming. Through modular design, the main control circuit board and embedded control software are compatible with the control functions and parameters required by both controllers. Simultaneously, it unifies the appearance, installation method, user interface, operation method, signal interface, operation and maintenance procedures, and repair processes of the two controllers, reducing the number of spare parts and accessories. Furthermore, it optimizes and improves existing servo and stepper motor-driven regulating valve controller hardware and software.

[0034] Based on the above, in order to clearly and in detail illustrate the advantages of this application, the specific embodiments of this application will be described below in conjunction with the accompanying drawings.

[0035] See Figure 1 The figure is a schematic diagram of the structure of a control device compatible with servo motor regulating valve and stepper motor regulating valve provided in an embodiment of this application.

[0036] This application provides a control device compatible with servo motor regulating valves and stepper motor regulating valves, comprising: a processor module 100, a servo driver module 200, a stepper driver module 300, and a communication interface module 400.

[0037] Both the servo driver module 200 and the stepper driver module 300 are connected to the processor module 100 to form a closed-loop control.

[0038] The servo driver module 200 and the stepper driver module 300 are respectively used for driving and communicating with the servo motor regulating valve 500 and the stepper motor regulating valve 600. By switching the embedded software working mode of the processor module 100, the device can work in either the servo motor regulating valve working mode or the stepper motor regulating valve working mode.

[0039] The processor module 100 is connected to the process control system 700 through the communication interface module 400. It is used to control the servo driver module to drive the servo motor regulating valve 200 to open or close according to the valve opening signal sent by the process control system 700, or to control the stepper driver module 300 to drive the stepper motor regulating valve to open or close, and to feed back the adjusted opening value to the process control system 700 through the communication interface module 400.

[0040] It should be noted that both servo motor controllers and stepper motor controllers consist of hardware circuits and software. The fundamental difference in the hardware circuits lies in the motor drive module, while the difference in the software lies in the driver program. The remaining hardware design and software programming are essentially the same. Therefore, this application's embodiment adopts a modular design for the controller's hardware circuits and software programming, ensuring that the control device and embedded control software are compatible with the control functions and parameter specifications required by servo and stepper motor controllers. The processor module 100 is the core component of the control device, responsible for driving the functions of each module, data communication, logic judgment, control scheduling, data processing, and storage.

[0041] First, initialize the system clock, timers, serial ports, I / O ports, and hardware interfaces of each module. Then, select the servo or stepper motor operating mode. If it is the servo motor operating mode, call the servo software driver; if it is the stepper motor operating mode, call the stepper motor software driver. After that, set the Ethernet, RS485, and CAN addresses, SV, PV, and valve stroke calibration. Once the settings are complete, the control device enters the working state.

[0042] When the control device is put into operation, it first reads the target opening value of the SV valve and the current return value of the PV valve position, and determines whether the difference is greater than the power-on opening protection setting value. If it is greater than the setting value, it needs to be manually adjusted on-site to reduce the opening difference to within the set protection value. If the difference between SV and PV is less than the setting value, the opening detection is normal. Then, it checks the historical fault records. If there are historical fault records, the authenticity of the fault needs to be confirmed on-site. If there is a fault, the fault needs to be troubleshooted on-site. If there is no fault, the fault record needs to be cleared manually. Then, it enters the automatic operation condition adjustment process, and starts periodically measuring the SV and PV values ​​and diagnosing faults. If there is a fault, it outputs the fault information to the process control system, records the fault, and returns it to the upper level. If there is no fault, it compares the absolute value of the difference between SV and PV. If the absolute value of the difference is greater than the dead zone setting value, it adjusts the valve opening. If it is less than the dead zone setting value, it maintains the original opening. After each cycle of adjustment, it uploads the PV value to the process control system, refreshes the LCD parameters and LED status display, and then starts a new cycle of measurement.

[0043] In one example, the software part of the processor module 100 adopts a modular functional design, in which each function is written as a sub-function. When the program runs, the main function calls each functional sub-function, or the modules are nested to call each other, so as to realize the adjustment function of the electric regulating valve.

[0044] In specific implementation, the servo driver module 200 and the stepper driver module 300 are used for hardware driving and communication of the servo motor and the stepper motor, respectively. By switching the working mode of the embedded software of the processor module 100, the control device can work in either the servo motor regulating valve mode or the stepper motor regulating valve mode.

[0045] Both the servo driver module 200 and the stepper driver module 300 have EtherCAT, CANopen, Modbus, and analog communication interfaces. They use the CANopen communication protocol, which is simple in hardware circuitry, widely used, and has high communication efficiency, to communicate with the microprocessor. By sending command words through the CAN bus, information such as the working mode, maximum start speed, stop speed, maximum current, and step displacement of the servo and stepper motors can be set respectively. The data frame structure can be: [Frame Start] + [Arbitration Field] + [Control Field] + [Data Field] + [CRC Field] + [Acknowledgement Field] + [Frame End].

[0046] To achieve closed-loop control, the servo driver module 200 and the stepper driver module 300 are compatible with BiSS, asynchronous serial, SPI, PWM and SSI encoder communication protocols. The widely used SSI communication protocol is selected. Through software adaptation and file download, the driver automatically obtains the encoder information and transmits it to the processor module 100 through the CAN bus interface to form closed-loop control.

[0047] In practical applications, both the servo driver module 200 and the stepper driver module 300 are compact in size, allowing them to be integrated into existing servo controller housings without increasing the overall size of the controller enclosure. This unifies the appearance, installation method, user interface, operation method, signal interface, operation and maintenance procedures, and repair processes of the control device, reducing the number of controller spare parts and accessories, thus achieving cost reduction and efficiency improvement. The hardware and software support motor encoder reading and writing functions, and the adjustment method is closed-loop control. The pressure and flow regulation functions and specifications of the closed-loop electric regulating valve controller are consistent, and actual operation verification shows high adjustment accuracy, good linearity, and small repeatability deviation.

[0048] In one example, the communication interface module 400 may include three signal interfaces: Ethernet, RS485, and 4-20mA, which can meet the communication requirements of most mainstream electric regulating valve controllers and process control systems.

[0049] In another example, the processor module 100 has a main frequency of 180MHz, a Flash memory of 1024K, an SRAM capacity of 256K, and may include: 140 I / O ports, 8 serial ports, 6 SPI interfaces, 14 timers, 2 CAN communication interfaces, and 1 Ethernet core module.

[0050] In some possible implementations of the embodiments of this application, the device may further include: a power module 1200;

[0051] The power module 1200 is used to provide operating power to the servo driver module 200, the stepper driver module 300, and the processor module 100.

[0052] In specific implementation, the power module 1200 can be an integrated power supply, with a power supply voltage of AC220V commonly used in industry. Through power conversion and distribution, it provides working power to the servo driver module 200, the stepper driver module 300, and the processor module 100 by DC24V, DC5V, and DC3.3V voltages.

[0053] In some possible implementations of the embodiments of this application, the processor module 100 may specifically be used for:

[0054] Upon receiving the valve opening signal, the PID software algorithm is invoked to convert the valve opening signal into a step adjustment signal for the servo motor regulating valve 500, which is then sent to the servo motor regulating valve 500 via the servo driver module 200 to execute the valve opening or closing action.

[0055] Alternatively, upon receiving the valve opening signal, a PID software algorithm is invoked to convert the valve opening signal into a step adjustment signal for the stepper motor regulating valve 600, which is then sent to the stepper motor regulating valve 600 via the stepper motor driver module 300 to execute the valve opening or closing action.

[0056] In one example, the processor module 100 may specifically include two operating modes: a PID control mode following the process control system and an independent PID control mode.

[0057] When operating in the PID control mode of the following process control system, the current real-time valve target opening signal output by the process control system 700 is received through the communication interface module 400 and used as the valve opening signal;

[0058] When operating in the independent PID control mode, the pressure control target setpoint output by the process control system 700 is received through the communication interface module 400. Based on the upstream and downstream pressure values ​​of the target valve, the opening value of the target valve and the required adjustment step are calculated using an embedded PID algorithm, which serves as the valve opening signal. The target valve is either the servo motor control valve 500 or the stepper motor control valve 600.

[0059] Understandably, when the processor module 100 operates in the independent PID control mode, the software algorithm utilizes the classic PID control principle. The control method involves using a valve body encoder as a device to read the motor's rotational position information. The servo or stepper motor driver automatically acquires the encoded value via the SSI bus and feeds it back to the processor module 100 via the CAN bus. The processor module 100 compares the actual position with the target position, calculates the deviation value, and then inputs this deviation value into the PID software algorithm to correct and compensate for the deviation value, obtaining the desired control value. This value is then controlled via the CAN bus to rotate the motor acting on the target valve to the specified position, forming a closed-loop control.

[0060] As an example, when operating in the independent PID control mode, PID control is performed according to the following formula:

[0061]

[0062] In the formula, u is the adjustment step size, k is the sampling number, Kp is the proportional gain, e is the deviation between the controlled variable and the given value, and T is the sampling period. i Let T be the integration time constant. D is the differential time constant.

[0063] Because the ambient temperature varies in different workplaces for electric regulating valves, and some electric regulating valves operate in high ambient temperatures, resulting in significant heat generation from the motor, in some possible implementations of this application, to prevent damage from excessively high motor temperatures, the device may further include: a temperature monitoring module 800 and a fault alarm module 900;

[0064] The temperature monitoring module 800 is used to monitor the temperature of the servo motor regulating valve 500 and the stepper motor regulating valve 600. When the temperature of the servo motor regulating valve 500 or the stepper motor regulating valve 600 exceeds the alarm setting limit, the module sends the corresponding fault alarm information to the fault alarm module 900.

[0065] The fault alarm module 900 transmits the fault alarm information to the process control system 700.

[0066] It should be noted that the temperature monitoring module 800 can be composed of a PT100 signal measurement module and a PT100 probe. The PT100 is embedded in the valve body near the motor. When the motor temperature changes, the output resistance value of the PT100 probe changes accordingly. The temperature monitoring module 800 converts the resistance value into a digital signal and transmits it to the processor module 100 through the SPI bus. When the temperature is higher than the alarm set limit, an alarm signal is output.

[0067] As an example, the fault alarm module 900 consists of a microprocessor I / O port and a relay. When the I / O port is low, the relay is turned on, the normally open contact is closed, and pins 1 and 2 of the relay are connected, outputting a dry contact signal to the process control system 700 and sending relevant alarm information.

[0068] In one possible example, the control unit's front panel is equipped with LED status indicators to display the controller's valve opening and closing status, as well as fault and alarm information. The status indicators can consist of a microprocessor I / O port and an LED; when the I / O port is at a low level, the LED is on and illuminates.

[0069] In some possible implementations of the embodiments of this application, the device may further include: a display screen communication module 1000;

[0070] The display communication module 1000 is connected to the processor module 100 and is used to receive the user's control setting signal and send the control setting signal to the processor module 100.

[0071] In practical implementation, the display communication module 1000 serves as the window for controller information display, parameter input, and function settings. During initial commissioning, it is necessary to set the operating mode, communication address, parameter settings, and functions such as SV, PV, and valve position stroke calibration of the control device. After completing the above function settings and calibrations, the control will enter the working screen. The display communication module 1000 and the processor module 100 can communicate via the USART serial bus.

[0072] In one example, the device may further include: a human infrared monitoring module 1100;

[0073] The human infrared monitoring module 1100 is connected to the display screen communication module 1000 and is used to control the display screen communication module 1000 to light up when a moving infrared object is detected; and to control the display screen communication module 1000 to turn off when no moving infrared object is detected within a preset time period.

[0074] Understandably, the human infrared detection module 1100 can be installed on the front panel of the control device, mainly used to turn the display communication module 1000 on and off to implement the screen saver function. The monitoring function of the human infrared detection module 1100 can be composed of a microprocessor I / O port and an infrared detection module. When the display communication module 1000 detects a moving infrared object, it outputs a high level. The microprocessor sends a command to turn on the display communication module 1000 via the serial port, and after a certain delay, sends a command to turn off the display communication module 1000 to implement the screen saver function.

[0075] As an example, the control device may also include an indicator light and button module, where the indicator lights are used to visually display the valve on / off status, fault alarm, and remote / local control status of the servo and stepper motor closed-loop controller. In local operation, the buttons can be used to manually operate the valve's opening and closing.

[0076] This application provides a control device compatible with servo motor regulating valves and stepper motor regulating valves, including: a processor module, a servo driver module, a stepper driver module, and a communication interface module; both the servo driver module and the stepper driver module are connected to the processor module to form a closed-loop control; the servo driver module and the stepper driver module are respectively used for driving and communicating with the servo motor regulating valve and the stepper motor regulating valve; by switching the embedded software working mode of the processor module, the device can operate in either the servo motor regulating valve working mode or the stepper motor regulating valve working mode; the processor module is connected to the process control system through the communication interface module, and is used to control the servo driver module to drive the opening and closing action of the servo motor regulating valve, or to control the stepper driver module to drive the opening and closing action of the stepper motor regulating valve, according to the valve opening signal sent by the process control system, and to feed back the adjusted opening value to the process control system through the communication interface module. In terms of functionality and performance, the embodiments of this application meet the pressure and flow regulation methods and parameter indicators of two electric regulating valves; in terms of appearance, they unify the signal interfaces, installation methods, operation interfaces, and operation methods of the two controllers, and unify the operation and maintenance process and repair procedures; in terms of cost, they reduce the number of controller spare parts and accessories, thereby achieving cost reduction and efficiency improvement; and they optimize and improve the hardware and software of existing servo and stepper motor regulating valve controller devices.

[0077] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application. All content not described in detail in this application can be derived from existing technology.

Claims

1. A control device compatible with servo motor regulating valves and stepper motor regulating valves, characterized in that, The device includes: a processor module, a servo driver module, a stepper driver module, and a communication interface module; Both the servo driver module and the stepper driver module are connected to the processor module to form a closed-loop control. The servo driver module and the stepper driver module are used for driving and communicating with the servo motor regulating valve and the stepper motor regulating valve, respectively. By switching the embedded software working mode of the processor module, the device can work in either the servo motor regulating valve working mode or the stepper motor regulating valve working mode. The processor module is connected to the process control system through the communication interface module. It is used to control the servo driver module to drive the servo motor regulating valve to open or close, or to control the stepper driver module to drive the stepper motor regulating valve to open or close, based on the valve opening signal sent by the process control system. The processor module then feeds back the adjusted opening value to the process control system through the communication interface module.

2. The control device for a servo motor regulating valve and a stepper motor regulating valve according to claim 1, characterized in that, The processor module is specifically used for: Upon receiving the valve opening signal, the PID software algorithm is invoked to convert the valve opening signal into a step adjustment signal for the servo motor regulating valve, which is then sent to the servo motor regulating valve through the servo driver module to execute the valve opening or closing action. Alternatively, upon receiving the valve opening signal, a PID software algorithm is invoked to convert the valve opening signal into a step distance adjustment signal for the stepper motor regulating valve, which is then sent to the stepper motor regulating valve via the stepper motor driver module to execute the valve opening or closing action.

3. The control device for a servo motor regulating valve and a stepper motor regulating valve according to claim 2, characterized in that, The processor module specifically includes two operating modes: a PID control mode following the process control system and an independent PID control mode. When operating in the PID control mode of the process control system, the current real-time valve target opening signal output by the process control system is received through the communication interface module and used as the valve opening signal; When operating in the independent PID control mode, the pressure control target setpoint output by the process control system is received through the communication interface module. Based on the upstream and downstream pressure values ​​of the target valve, the opening value of the target valve and the required adjustment step are calculated using an embedded PID algorithm, which serves as the valve opening signal. The target valve is either the servo motor control valve or the stepper motor control valve.

4. The control device for a servo motor regulating valve and a stepper motor regulating valve as described in claim 3, characterized in that, When operating in the independent PID control mode, PID control is performed according to the following formula: In the formula, u is the adjustment step size, k is the sampling number, Kp is the proportional gain, e is the deviation between the controlled variable and the given value, and T is the sampling period. i Let T be the integration time constant. D is the differential time constant.

5. The control device for a servo motor regulating valve and a stepper motor regulating valve according to any one of claims 1-4, characterized in that, The device further includes: a temperature monitoring module and a fault alarm module; The temperature monitoring module is used to monitor the temperature of the servo motor regulating valve and the stepper motor regulating valve. When the temperature of the servo motor regulating valve or the stepper motor regulating valve exceeds the alarm setting limit, the module sends the corresponding fault alarm information to the fault alarm module. The fault alarm module transmits the fault alarm information to the process control system.

6. The control device for a servo motor regulating valve and a stepper motor regulating valve according to any one of claims 1-4, characterized in that, The device further includes: a display screen communication module; The display screen communication module is connected to the processor module and is used to receive the user's control setting signal and send the control setting signal to the processor module.

7. The control device for a servo motor regulating valve and a stepper motor regulating valve according to claim 6, characterized in that, The device further includes: a human infrared monitoring module; The human infrared monitoring module is connected to the display screen communication module and is used to control the display screen communication module to light up when a moving infrared object is detected; and to control the display screen communication module to turn off when no moving infrared object is detected within a preset time period.

8. The control device for a servo motor regulating valve and a stepper motor regulating valve according to any one of claims 1-4, characterized in that, The communication interface module includes three signal interfaces: Ethernet, RS485, and 4-20mA.

9. The control device for a servo motor regulating valve and a stepper motor regulating valve according to any one of claims 1-4, characterized in that, The processor module has a main frequency of 180MHz, a Flash memory of 1024K, an SRAM capacity of 256K, and includes: 140 I / O ports, 8 serial ports, 6 SPI interfaces, 14 timers, 2 CAN communication interfaces, and 1 Ethernet core module.

10. The control device for a servo motor regulating valve and a stepper motor regulating valve according to any one of claims 1-4, characterized in that, The device further includes: a power module; The power supply module is used to provide operating power to the servo driver module, the stepper driver module, and the processor module.

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