Actuator control circuit and method

Abstract

The present invention discloses an actuator control circuit and method, which may include a rectifier and filter circuit, a first step-down module, an energy storage battery, a power supply switching switch, a second step-down module, a first central processing unit CPU, a communication module and a second central processing unit CPU. The power supply of the relevant equipment in the actuator control circuit and the valve motor in the actuator can be diversified, and the calculation amount of a single CPU can be reduced, the calculation burden of a single CPU can be reduced, the calculation efficiency of the CPU can be improved, and the control efficiency of the actuator can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating control, and in particular to an actuator control circuit and method. Background Art

[0002] In the cold season in the north, indoor heating is usually required to ensure that people can live and work normally indoors. The normal operation of the secondary heating network is the key to ensuring indoor heating comfort.

[0003] The secondary heating network is a pipe network for the heat fluid (such as steam, hot water, etc.) generated by the heat source plant to flow from the heat exchange station to the heating user buildings after reaching the heat exchange station. The secondary heating network is provided with a heating valve, an actuator of the heating valve, and a control circuit that can control the working state of the actuator. The control circuit is provided with a central processing unit (CPU). The actuator can control the opening of the heating valve.

[0004] Currently, technicians can remotely send the desired temperature value for indoor heating to the above-mentioned CPU at the service end. After receiving the temperature value, the CPU can output a corresponding control signal to the actuator to control the working state of the actuator, and then control the opening of the heating valve, thereby realizing the control of physical parameters such as pressure, temperature, and flow of the thermal fluid flowing to the heating user building.

[0005] However, the power supply of the devices in the above control circuit (such as CPU) is a single external power supply. When the external power supply is cut off, the devices in the control circuit will not be able to operate normally due to power loss, and the indoor heating of the heat users cannot be guaranteed. Summary of the invention

[0006] In view of the above problems, the present invention proposes an actuator control circuit and method that overcomes the above problems or at least partially solves the above problems. The technical solution is as follows:

[0007] An actuator control circuit, the actuator control circuit comprising: a rectifier filter circuit, a first step-down module, an energy storage battery, a power switch, a second step-down module, a first central processing unit CPU, a communication module and a second central processing unit CPU;

[0008] The power input end of the rectifying and filtering circuit is a power connection end, and the power output end of the rectifying and filtering circuit is electrically connected to the power input end of the first step-down module;

[0009] The power output end of the first step-down module is electrically connected to the first end of the power switch;

[0010] The power output end of the energy storage battery is electrically connected to the second end of the power switch;

[0011] The third end of the power switch is the power supply end of the actuator, and the power supply end of the actuator is the power input end of the valve motor in the actuator; the third end of the power switch is electrically connected to the power input end of the second step-down module;

[0012] When the power switch is operating in a first switching state, the third end of the power switch is electrically connected to the first end of the power switch; when the power switch is operating in a second switching state, the third end of the power switch is electrically connected to the second end of the power switch;

[0013] The power output end of the second step-down module is electrically connected to the first CPU and the second CPU respectively;

[0014] The first CPU is connected to the server through the communication module;

[0015] The second CPU is respectively connected to the first CPU and the execution mechanism for communication;

[0016] The first CPU receives the actuator control information sent by the server through the communication module, and the first CPU forwards the actuator control information to the second CPU;

[0017] The second CPU controls the working state of the actuator according to the received actuator control information.

[0018] Optionally, the communication module is a narrowband Internet of Things NB-IoT communication module;

[0019] The power output end of the second step-down module is electrically connected to the NB-IoT communication module.

[0020] Optionally, the communication module includes: a 4G / 5G to RS485 communication module and an RS485 communication circuit;

[0021] The first CPU is connected to the server through the RS485 communication circuit and the 4G / 5G to RS485 communication module in turn.

[0022] Optionally, the communication module includes: a LoRa communication module and a LoRa to 4G / 5G communication module;

[0023] The first CPU is connected to the server through the LoRa communication module and the LoRa to 4G / 5G communication module in sequence.

[0024] Optionally, the actuator control circuit further includes: a pressure sensor, a temperature sensor, a first signal conversion chip and a second signal conversion chip;

[0025] The power output end of the second voltage reduction module is electrically connected to the pressure sensor, the first signal conversion chip and the second signal conversion chip respectively;

[0026] The pressure sensor is communicatively connected to the first CPU via the first signal conversion chip;

[0027] The temperature sensor is communicatively connected to the first CPU via the second signal conversion chip.

[0028] Optionally, the actuator control circuit further includes: a near field communication NFC module;

[0029] The power output terminal of the second step-down module is electrically connected to the NFC module;

[0030] The NFC module is respectively connected to the second CPU and the user's mobile terminal for communication;

[0031] The NFC module receives the actuator control information sent by the mobile terminal, and sends the received actuator control information to the second CPU;

[0032] The second CPU controls the working state of the actuator according to the actuator control information sent by the NFC module.

[0033] Optionally, the actuator control circuit further includes: a first sleep switch, a second sleep switch and a third sleep switch;

[0034] The third end of the power switch is electrically connected to the power supply end of the actuator through the first sleep switch;

[0035] The power output end of the second voltage reduction module is electrically connected to the second CPU via a second sleep switch;

[0036] The power output end of the second voltage reduction module is electrically connected to the pressure sensor via a third sleep switch;

[0037] The first CPU is respectively connected to the first sleep switch, the second sleep switch and the third sleep switch in communication;

[0038] After receiving the sleep signal sent by the service end, the first CPU controls the first sleep switch, the second sleep switch and the third sleep switch to be turned off so that the valve motor in the actuator, the second CPU and the pressure sensor are powered off;

[0039] After receiving the working signal sent by the service end, the first CPU controls the first sleep switch, the second sleep switch and the third sleep switch to close, so that the valve motor in the actuator, the second CPU and the pressure sensor are powered on.

[0040] Optionally, the actuator control circuit further includes: a manual power-off module based on photoelectric induction; the manual power-off module includes: a manual wrench, a signal detection circuit and a circuit board provided with a photosensitive element;

[0041] The signal detection circuit is electrically connected to the circuit board and the second CPU respectively;

[0042] The second CPU receives the detection signal sent by the signal detection circuit;

[0043] The second CPU controls the working state of the actuator according to the detection signal.

[0044] Optionally, the actuator control circuit further includes: a power supply detection circuit and an energy storage capacitor;

[0045] The signal detection end of the power detection circuit is electrically connected to the power output end of the second step-down module, and the signal output end of the power detection circuit is electrically connected to the second CPU;

[0046] The energy storage capacitor is electrically connected to the power output terminal of the second step-down module;

[0047] When the second CPU receives a power-off signal outputted by the signal output terminal of the power detection circuit, the second CPU stores the current related control parameters through the electric energy released by the energy storage capacitor.

[0048] An actuator control method, the actuator control method is applied to the actuator control circuit according to claim 7, the actuator is provided with a wake-up button, the actuator control circuit further comprises: a wake-up circuit, the first CPU is electrically connected to the wake-up button through the wake-up circuit;

[0049] After the first CPU controls the first sleep switch, the second sleep switch, and the third sleep switch to be turned off, the actuator control method further includes:

[0050] When the first CPU detects an electrical signal generated by the user pressing the wake-up button, the first CPU controls the second sleep switch and the third sleep switch to close, so that the second CPU and the pressure sensor are powered on;

[0051] The first CPU sends a detection enable signal to the pressure sensor through the first signal conversion chip to trigger the pressure sensor to perform detection; the first CPU sends a detection enable signal to the temperature sensor through the second signal conversion chip to trigger the temperature sensor to perform detection;

[0052] The pressure sensor sends the detected pressure value to the first CPU through the first signal conversion chip, and the temperature sensor sends the detected temperature value to the first CPU through the second signal conversion chip;

[0053] The first CPU sends the obtained pressure value and temperature value to the user's mobile terminal through the second CPU and the NFC module in sequence for display, and controls the second sleep switch and the third sleep switch to be disconnected, so that the second CPU and the pressure sensor are powered off.

[0054] The actuator control circuit and method proposed in the present invention may include a rectifier and filter circuit, a first step-down module, an energy storage battery, a power switching switch, a second step-down module, a first central processing unit CPU, a communication module and a second central processing unit CPU. The power supply of the relevant equipment in the actuator control circuit and the valve motor in the actuator can be diversified, and the calculation amount of a single CPU can be reduced, the calculation burden of a single CPU can be reduced, the calculation efficiency of the CPU can be improved, and the control efficiency of the actuator can be improved.

[0055] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the proposed drawings without paying any creative work.

[0057] Figure 1 A schematic diagram of the structure of an actuator control circuit proposed in an embodiment of the present invention is shown;

[0058] Figure 2 A schematic diagram showing the structure of another actuator control circuit proposed in an embodiment of the present invention is shown;

[0059] Figure 3A schematic diagram showing the structure of another actuator control circuit proposed in an embodiment of the present invention is shown;

[0060] Figure 4 A schematic diagram showing the structure of another actuator control circuit proposed in an embodiment of the present invention is shown;

[0061] Figure 5 A schematic diagram showing the structure of another actuator control circuit proposed in an embodiment of the present invention is shown;

[0062] Figure 6 A schematic diagram showing the structure of another actuator control circuit proposed in an embodiment of the present invention is shown;

[0063] Figure 7 A flow chart of another actuator control method proposed in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0064] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0065] like Figure 1 As shown, this embodiment proposes an actuator control circuit 200, which may include: a rectifier and filter circuit 100, a first buck module 101, an energy storage battery 102, a power switching switch, a second buck module 103, a communication module 104, a first central processing unit CPU 105 and a second central processing unit CPU 106.

[0066] The power input terminal of the rectifier and filter circuit 100 is a power connection terminal, and the power output terminal of the rectifier and filter circuit 100 is electrically connected to the power input terminal of the first step-down module 101;

[0067] The power output end of the first voltage reduction module 101 is electrically connected to the first end of the power switch;

[0068] The power output terminal of the energy storage battery 102 is electrically connected to the second terminal of the power switch;

[0069] The third end of the power switch is the power supply end of the actuator, and the power supply end of the actuator is the power input end of the valve motor in the actuator; the third end of the power switch is electrically connected to the power input end of the second step-down module 103;

[0070] When the power switch is operating in the first switching state, the third end of the power switch is electrically connected to the first end of the power switch; when the power switch is operating in the second switching state, the third end of the power switch is electrically connected to the second end of the power switch;

[0071] The power output end of the second step-down module 103 is electrically connected to the first CPU 105 and the second CPU 106 respectively;

[0072] The first CPU 105 is connected to the server through the communication module 104;

[0073] The second CPU 106 is respectively connected to the first CPU 105 and the execution mechanism for communication;

[0074] The first CPU 105 receives the actuator control information sent by the server through the communication module 104, and the first CPU 105 forwards the actuator control information to the second CPU 106;

[0075] The second CPU 106 controls the working state of the actuator according to the received actuator control information.

[0076] The actuator may be an actuator for controlling a valve, i.e., a valve actuator. It should be noted that the actuator control circuit 200 in this embodiment may output a control signal to the actuator to control the working state of the actuator, i.e., control the action parameters such as the action speed, action duration, and action stroke of the actuator, so that the actuator can control the opening of the valve to the target opening.

[0077] It should be noted that the valve in this embodiment can be a heating valve used in a heating secondary network, or a valve used in other application scenarios, such as a valve used in a refrigeration, water supply, and other pipe networks. The present invention does not limit the specific application scenarios of the valve. Accordingly, the actuator in this embodiment can also be used in a variety of application scenarios including but not limited to a heating secondary network, refrigeration, water supply, and the like.

[0078] It should be noted that the present invention can select an external power supply or an energy storage battery 102 as the power supply for the relevant devices (such as the first CPU 105 and the second CPU 106) in the actuator control circuit 200 and the valve motor in the actuator.

[0079] Among them, the rectifier and filter circuit 100 is a circuit that can convert AC power into DC power. The power source connected to the rectifier and filter circuit 100 at the power connection end is an external power source. The external power source can be an AC power source or a DC power source. When the external power source is an AC power source, the rectifier and filter circuit 100 can convert the AC power output by the external power source into DC power and output it to the first step-down module 101; when the external power source is a DC power source, the rectifier and filter circuit 100 can directly transmit the DC power output by the external power source to the first step-down module 101 without converting AC power to DC power. The present invention is provided with a rectifier and filter circuit 100, which can ensure that the above-mentioned related equipment and valve motor can obtain DC power supply when the external power source is used as the above-mentioned power supply.

[0080] The first step-down module 101 can step down the voltage of the DC power output by the external power supply after rectification and filtering. It should be noted that the voltage of the DC power output by the external power supply through the rectification and filtering circuit 100 and the first step-down module 101 can match the working voltage of the valve motor (such as 5 to 7.2 volts), and the DC power output by the external power supply through the rectification and filtering circuit 100 and the first step-down module 101 can power the valve motor.

[0081] It should be noted that the voltage of the DC power output by the energy storage battery 102 can match the working voltage of the valve motor. Therefore, the DC power output by the energy storage battery 102 can directly power the valve motor without the need for AC to DC conversion through the rectifier filter circuit 100 or voltage conversion through the first step-down module 101.

[0082] Among them, the second step-down module 103 can step down the DC power output by the first step-down module 101 or the DC power output by the energy storage battery 102. The DC power output by the second step-down module 103 can power the above-mentioned related equipment and valve motor, that is, the electric energy output by the external power supply can power the above-mentioned related equipment and valve motor after passing through the rectifier filter circuit 100, the first step-down module 101 and the second step-down module 103 in sequence, and the DC power output by the energy storage battery 102 can power the above-mentioned related equipment and valve motor after passing through the second step-down module 103.

[0083] It should be noted that the valve motor can be a brushless DC motor with an operating voltage of 5 volts. The brushless DC motor has a large output force, low power consumption, high reliability and strong stability. When the brushless DC motor is used as the valve motor, the present invention can improve the control efficiency and control stability of the actuator, reduce the power consumption of the external power supply or the energy storage battery 102, ensure the service life of the energy storage battery 102, and improve energy utilization. It can be understood that the DC power output by the energy storage battery 102 can directly drive the valve motor to operate without the need for related power conversion through the rectifier filter circuit 100 and the first step-down module 101, which can avoid energy loss caused by unnecessary power conversion, reduce the number of batteries required, and thus reduce the volume of the actuator control circuit 200.

[0084] Specifically, the present invention can select an external power source or an energy storage battery 102 as the power supply for related devices in the actuator control circuit 200 and the valve motor in the actuator by controlling the switching state of the power switching switch.

[0085] When the power switch is in the first switching state, the third end of the power switch is connected to the first end, and the power supply circuits for the external power supply to supply power to the valve motor and the above-mentioned related equipment are all closed. The external power supply can be used as the power supply for the valve motor and the above-mentioned related equipment. The external power supply can supply power to the valve motor through the rectifier filter circuit 100, the first step-down module 101 and the power switch in sequence, and can also supply power to the above-mentioned related equipment through the rectifier filter circuit 100, the first step-down module 101, the power switch and the second step-down module 103 in sequence. It should be noted that when the power switch is in the first switching state, the third end of the power switch is not connected to the second end, and the power supply circuits for the energy storage battery 102 to supply power to the valve motor and the above-mentioned related equipment are not closed, and the energy storage battery 102 cannot supply power to the valve motor and the above-mentioned related equipment.

[0086] When the power switch is in the second switching state, the third end of the power switch is connected to the second end, and the power supply circuits of the energy storage battery 102 to the valve motor and the above-mentioned related equipment are closed. The energy storage battery 102 can be used as the power supply for the valve motor and the above-mentioned related equipment. The energy storage battery 102 can supply power to the valve motor through the power switch, and can also supply power to the above-mentioned related equipment in sequence through the power switch and the second step-down module 103. It should be noted that when the power switch is in the second switching state, the third end of the power switch is not connected to the first end, and the power supply circuits for the external power supply to supply power to the valve motor and the above-mentioned related equipment are not closed, and the external power supply cannot supply power to the valve motor and the above-mentioned related equipment.

[0087] It should be noted that the switching state of the power switch can be manually controlled by a technician.

[0088] The server is a server of an application program that can control the actuator, and can be installed and run in electronic devices such as servers, mobile phones, and tablet computers. The server is connected to the first CPU 105 in the actuator control circuit 200 through the communication module 104, and the first CPU 105 can communicate remotely with the server through the communication module 104.

[0089] It can be understood that the present invention can be implemented by a technician inputting actuator control information at the server end, and then the server end sends the actuator control information to the actuator control circuit 200, so that the actuator control circuit 200 controls the working state of the actuator according to the received actuator control information.

[0090] Optionally, the actuator control information can be parameter values ​​of action parameters such as the actuator's action speed, action duration, action time and action stroke; it can be understood that the actuator control information can also be parameter values ​​of other parameters related to the actuator action, such as the target opening of the valve, indoor temperature (when the actuator is used in a heating scenario), and water flow rate (when the actuator is used in a water supply scenario).

[0091] Specifically, the first CPU 105 can receive the actuator control information sent by the service end through the communication module 104, and can forward the received actuator control information to the second CPU 106. After receiving the actuator control information, the second CPU 106 can generate a corresponding pulse width modulation (PWM) signal according to the actuator control information and output it to the drive circuit connected to the valve motor in the actuator, thereby controlling the valve motor to perform an action matching the actuator control information, and controlling the valve opening to the target opening.

[0092] It should be noted that, in the process of controlling the valve through the actuator, the second CPU 106 can obtain the position information fed back by the valve motor, and can perform real-time calculations based on the position information, generate corresponding control signals and output them to the actuator, so that the actuator can control the valve opening more accurately to the target opening.

[0093] It should be noted that in the prior art, a CPU needs to simultaneously perform the task of communicating with the server and the task of generating a control signal for controlling the actuator to perform an action based on the communication information with the server. The present invention uses the first CPU 105 to perform the task of communicating with the server, and uses the second CPU 106 to perform the task of generating a control signal for controlling the actuator to perform an action based on the communication information between the server and the first CPU 105 (i.e., the actuator control information). Compared with the prior art, the technical solution adopted by the present invention can reduce the amount of calculation of a single CPU, reduce the calculation burden of a single CPU, improve the calculation efficiency of the CPU, and thus improve the control efficiency of the actuator. Among them, both the first CPU 105 and the second CPU 106 can be 32-bit processors, which can meet the processing requirements of the actuator control circuit 200 for large amounts of communication information and control information.

[0094] It should also be noted that the second CPU 106 of the present invention can be set with multiple control modes in the technical solution of controlling the valve through the actuator, such as the opening control mode and the pulse control mode. Among them, in the opening control mode, the second CPU 106 can control the actuator to drive the valve to move, so as to perform equal percentage control on the valve opening, thereby improving the control accuracy; in the pulse control mode, the second CPU 106 can perform timing control on the valve through the actuator. Specifically, when the actuator control information sent by the server and received by the second CPU 106 is the target opening of the valve, the second CPU 106 can enter the opening control mode, and the second CPU 106 can control the opening of the valve to the target opening through the actuator; specifically, when the actuator control information sent by the server and received by the second CPU 106 includes a preset upper opening limit value, a preset lower opening limit value, a first preset action time and a second preset action time of the valve, the second CPU 106 can enter the pulse control mode, and the second CPU 106 can control the opening of the valve to the preset upper opening limit value at the first preset action time, and control the opening of the valve to the preset lower opening limit value at the second preset action time, thereby realizing timed control of the valve.

[0095] It should also be noted that when the second CPU 106 generates a control signal to be output to the actuator, it can compensate the control signal according to the opening characteristic of the valve, so as to more accurately control the opening of the valve to the target opening.

[0096] Optionally, in another actuator control circuit 200 provided in this embodiment, the power switch may be a double-pole double-throw switch, such as Figure 2At this time, in the actuator control circuit 200, the first end of the external power supply is electrically connected to the first end of the rectifier and filter circuit 100, the second end of the external power supply is electrically connected to the second end of the rectifier and filter circuit 100, the third end of the rectifier and filter circuit 100 is electrically connected to the first end of the first buck module 101, the fourth end of the rectifier and filter circuit 100 is electrically connected to the second end of the first buck module 101, the third end of the first buck module 101, i.e., the positive pole (+), is electrically connected to the first static contact of the double-pole double-throw switch, the fourth end of the first buck module 101, i.e., the negative pole (-), is electrically connected to the second static contact of the double-pole double-throw switch, the positive pole (+) of the energy storage battery 102 is electrically connected to the third static contact of the double-pole double-throw switch, and the positive pole (-) of the energy storage battery 102 is electrically connected to the third static contact of the double-pole double-throw switch. Electrical connection, the negative pole (-) of the energy storage battery 102 is electrically connected to the fourth static contact of the double-pole double-throw switch, the first moving contact of the double-pole double-throw switch is electrically connected to the power supply end of the actuator and the first end of the second step-down module 103, respectively, the second moving contact of the double-pole double-throw switch is electrically connected to the power output end of the actuator and the second end of the second step-down module 103, respectively, the third end of the second step-down module 103, i.e. the positive pole (+), is electrically connected to the power input end of the first CPU 105 and the power input end of the second CPU 106, respectively, and the fourth end of the second step-down module 103, i.e. the negative pole (-), is electrically connected to the power output end of the first CPU 105 and the power output end of the second CPU 106, respectively.

[0097] When the power switch is in the first switching state, the first static contact of the double-pole double-throw switch is connected to the first moving contact, and the third static contact is connected to the second moving contact. Figure 2 The external power supply shown can supply power to the valve motor in the actuator in sequence via the rectifier and filter circuit 100, the first step-down module 101 and the power switching switch, and the external power supply can supply power to the relevant devices in the actuator control circuit 200, namely the first CPU 105 and the second CPU 106, in sequence via the rectifier and filter circuit 100, the first step-down module 101, the power switching switch and the second step-down module 103.

[0098] Among them, when the power switching switch is in the second switching state, the second static contact of the double-pole double-throw switch is connected to the first moving contact, and the fourth static contact is connected to the second moving contact. At this time, the energy storage battery 102 can supply power to the valve motor in the actuator through the power switching switch, and the energy storage battery 102 can supply power to related devices in the actuator control circuit 200, namely the first CPU 105 and the second CPU 106, through the second step-down module 103.

[0099] It should be noted that when the actuator control circuit 200 needs to be in a working state, the present invention can maintain the power switch in the first switching state or the second switching state, and use one of the external power supply and the energy storage battery 102 as the power supply for the above-mentioned related equipment and the valve motor, and use the other as a backup power supply. If the power supply currently in use cannot continue to supply power, the present invention can switch the current switching state of the power switch to enable the backup power supply to supply power to the above-mentioned related equipment and the valve motor, so that the actuator control circuit 200 and the valve motor can continue to be in a working state.

[0100] The actuator control circuit 200 proposed in this embodiment may include a rectifier and filter circuit 100, a first step-down module 101, an energy storage battery 102, a power switching switch, a second step-down module 103, a first central processing unit CPU, a communication module 104 and a second central processing unit CPU. It can diversify the power supply of related equipment in the actuator control circuit 200 and the valve motor in the actuator, reduce the amount of calculation of a single CPU, reduce the calculation burden of a single CPU, improve the calculation efficiency of the CPU, and thus improve the control efficiency of the actuator.

[0101] based on Figure 1 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, and the communication module 104 can be a narrow band Internet of Things (NB-IoT) communication module. The power output end of the second step-down module 103 is electrically connected to the NB-IoT communication module.

[0102] In the present invention, the external power supply can sequentially supply power to the NB-IoT communication module via the rectifier filter circuit 100, the first step-down module 101, the power switching switch and the second step-down module 103; the energy storage battery 102 can sequentially supply power to the NB-IoT communication module via the power switching switch and the second step-down module 103.

[0103] Specifically, the first CPU 105 can communicate remotely with the server through the NB-IoT communication module, so that the server can remotely send actuator control information to the actuator control circuit 200 to achieve remote control of the actuator and the valve.

[0104] Optionally, in another actuator control circuit 200 proposed in this embodiment, the communication module 104 may include: a 4G / 5G to RS485 communication module and an RS485 communication circuit. The first CPU 105 is connected to the server through the RS485 communication circuit and the 4G / 5G to RS485 communication module in turn.

[0105] It should be noted that the 4G / 5G to RS485 communication module in this embodiment does not require the above-mentioned external power supply or energy storage battery 102 for power supply, and can be powered by other power supplies, and its power supply voltage can be 12 to 24 volts.

[0106] Among them, the actuator control information sent by the server can be sent to the first CPU 105 in turn through the 4G / 5G to RS485 communication module and the RS485 communication circuit, so that the server can remotely send the actuator control information to the actuator control circuit 200 to achieve remote control of the actuator and the valve.

[0107] Optionally, in another actuator control circuit 200 proposed in this embodiment, the communication module 104 may include: a LoRa communication module and a LoRa to 4G / 5G communication module;

[0108] The first CPU 105 is connected to the server through the LoRa communication module 104 and the LoRa to 4G / 5G communication module in sequence.

[0109] Specifically, the first CPU 105 and the server can communicate wirelessly through the LoRa communication module and the LoRa to 4G / 5G communication module. The control signal sent by the server can be transmitted to the first CPU 105 via the LoRa to 4G / 5G communication module and the LoRa communication module in sequence, and the communication information sent by the first CPU 105 can be transmitted to the server via the LoRa communication module and the LoRa to 4G / 5G communication module in sequence and displayed on the interface of the server, so that the server can remotely send the actuator control information to the actuator control circuit 200 to achieve remote control of the actuator and the valve.

[0110] It is understandable that in another actuator control circuit 200 proposed in this embodiment, the communication module 104 may also include: NB-IoT communication module, 4G / 5G to RS485 communication module, RS485 communication circuit, LoRa communication module and LoRa to 4G / 5G communication module, so as to enrich the communication mode between the service end and the first CPU 105. Among them, the connection relationship between the NB-IoT communication module, the 4G / 5G to RS485 communication module, the RS485 communication circuit, the LoRa communication module and the LoRa to 4G / 5G communication module, and the connection relationship between them and other devices in the actuator control circuit 200 have been described in the above content and will not be repeated here.

[0111] The actuator control circuit 200 proposed in this embodiment can realize remote communication connection between the actuator control circuit 200 and the server, so that the server can remotely send actuator control information to the actuator control circuit 200 to realize remote control of the actuator and the valve.

[0112] Optional, based on Figure 1 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, such as Figure 3 As shown, the actuator control circuit 200 may further include: a pressure sensor 107 , a temperature sensor 108 , a first signal conversion chip 109 and a second signal conversion chip 110 .

[0113] The power output end of the second voltage reduction module 103 is electrically connected to the pressure sensor 107, the first signal conversion chip 109 and the second signal conversion chip 110 respectively;

[0114] The pressure sensor 107 is connected to the first CPU 105 through the first signal conversion chip 109;

[0115] The temperature sensor 108 is connected to the first CPU 105 in communication via the second signal conversion chip 110 .

[0116] In the present invention, the external power supply can sequentially supply power to the pressure sensor 107, the first signal conversion chip 109 and the second signal conversion chip 110 through the rectifier filter circuit 100, the first buck module 101, the power switch and the second buck module 103. The energy storage battery 102 can also sequentially supply power to the pressure sensor 107, the first signal conversion chip 109 and the second signal conversion chip 110 through the power switch and the second buck module 103. It should be noted that the temperature sensor 108 does not need to be powered.

[0117] The pressure sensor 107 can detect the pressure of the fluid in the pipeline where the valve is located, and the temperature sensor 108 can detect the temperature of the fluid in the pipeline where the valve is located. The fluid pressure detected by the pressure sensor 107 can be converted into a signal that can be recognized by the CPU through the first signal conversion chip 109 and sent to the first CPU 105, and the fluid temperature detected by the temperature sensor 108 can be converted into a signal that can be recognized by the CPU and sent to the first CPU 105.

[0118] Specifically, the present invention can send the fluid pressure and fluid temperature received by the first CPU 105 to the server through the communication module 104 and display them on the interface of the server, thereby providing technicians with information on fluid pressure and fluid temperature and enhancing human-computer interaction.

[0119] It should be noted that the present invention does not limit the specific types of the pressure sensor 107 and the temperature sensor 108. For example, the present invention may use a pressure sensor 107 that can output RS485 signals to ensure the stability of the signal transmission of the pressure sensor 107; the present invention may use a PT1000 temperature sensor 108 to improve the accuracy of temperature detection.

[0120] It should be noted that the pressure sensor 107 and the temperature sensor 108 in this embodiment can both be RS485 digital sensors, and can both output RS485 signals to the signal conversion chip, and the signal transmission process has strong stability. Among them, the signal conversion chip has a calibration function. The present invention uses the signal conversion chip to convert the output signals of the pressure sensor 107 and the temperature sensor 108 into digital signals that can be recognized by the CPU, which can reduce the detection error of the fluid pressure and fluid temperature and improve the detection accuracy.

[0121] It should also be noted that the second CPU 106 of the present invention can also be provided with a temperature control mode in the technical solution of controlling the valve by the actuator. The temperature control mode includes a heating mode and a cooling mode. In the temperature control mode, the second CPU 106 can control the flow of the fluid in the pipeline where the valve is located by controlling the valve opening by the actuator to control the temperature of the fluid in the pipeline where the valve is located to a preset temperature. Specifically, when the actuator control information sent by the service end received by the second CPU 106 is a preset temperature, the second CPU 106 can enter the temperature control mode, after which the second CPU 106 can obtain the preset temperature sent by the service end and the actual temperature of the fluid detected by the temperature sensor 108 from the first CPU 105, and can determine the target opening of the valve according to the preset temperature and the actual temperature of the fluid, and perform proportional-integral-derivative (PID) negative feedback control on the valve by the actuator until the actual temperature of the fluid is controlled to the preset temperature. The present invention can be pre-set by technicians for parameters such as the proportional coefficient, integral coefficient, breeze real number, minimum safe opening, temperature hysteresis, and integral interval time in the temperature control mode.

[0122] The actuator control circuit 200 proposed in this embodiment can detect and collect fluid pressure and fluid temperature through the pressure sensor 107 and the temperature sensor 108, and can reduce detection errors and improve detection accuracy through the setting of a signal conversion chip.

[0123] based on Figure 3 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, such as Figure 4As shown, the actuator control circuit 200 further includes: a near field communication (NFC) module 111 .

[0124] The power output terminal of the second voltage reduction module 103 is electrically connected to the NFC module 111;

[0125] The NFC module 111 is connected to the second CPU 106 and the user's mobile terminal for communication;

[0126] The NFC module 111 receives the actuator control information sent by the mobile terminal, and sends the received actuator control information to the second CPU 106;

[0127] The second CPU 106 controls the working state of the actuator according to the actuator control information sent by the NFC module 111 .

[0128] In the present invention, the external power supply can sequentially supply power to the NFC module 111 through the rectifier and filter circuit 100, the first buck module 101, the power switching switch and the second buck module 103, or the energy storage battery 102 can sequentially supply power to the NFC module 111 through the power switching switch and the second buck module 103.

[0129] The mobile terminal may be a mobile terminal installed with an application for controlling the actuator and having an NFC function, and may be an electronic device such as a mobile phone or a tablet computer.

[0130] Specifically, when the user inputs the actuator control information in the application of the mobile terminal and brings the mobile terminal close to the NFC identification area of ​​the NFC module 111 of the actuator control circuit 200, the NFC module 111 can receive the actuator control information sent by the mobile terminal.

[0131] Specifically, after receiving the actuator control information sent by the mobile terminal, the NFC module 111 may forward it to the second CPU 106 , and the second CPU 106 may control the working state of the actuator according to the actuator control information, thereby controlling the opening of the valve.

[0132] The actuator control circuit 200 proposed in this embodiment enriches the communication method between the actuator control circuit 200 and the outside world through the setting of the NFC module 111, and allows the user to use the mobile terminal to control the working state of the actuator, thereby improving the user's control efficiency over the actuator.

[0133] based on Figure 4 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, such as Figure 5As shown, the actuator control circuit 200 may further include: a first sleep switch, a second sleep switch and a third sleep switch;

[0134] The third end of the power switch is electrically connected to the power supply end of the actuator through the first sleep switch;

[0135] The power output terminal of the second voltage reduction module 103 is electrically connected to the second CPU 106 via the second sleep switch;

[0136] The power output end of the second voltage reduction module 103 is electrically connected to the pressure sensor 107 via the third sleep switch;

[0137] The first CPU 105 is respectively connected to the first sleep switch, the second sleep switch and the third sleep switch for communication;

[0138] After receiving the sleep signal sent by the service end, the first CPU 105 controls the first sleep switch, the second sleep switch and the third sleep switch to be turned off, so that the valve motor in the actuator, the second CPU 106 and the pressure sensor 107 are powered off;

[0139] After receiving the working signal sent by the service end, the first CPU 105 controls the first sleep switch, the second sleep switch and the third sleep switch to close, so that the valve motor, the second CPU 106 and the pressure sensor 107 in the actuator are powered on.

[0140] It should be noted that the first CPU 105 can receive a sleep signal sent by the service end through the communication module 104. Specifically, after receiving the sleep signal, the first CPU 105 can control the first sleep switch, the second sleep switch and the third sleep switch to be in an off state to power off the valve motor, the second CPU 106 and the pressure sensor 107 in the actuator, and can trigger the first CPU 105, the first signal conversion chip 109 and the second signal conversion chip 110 to shut down their own non-essential power-consuming devices and enter the sleep mode, so that the actuator control circuit 200 enters the sleep mode to reduce the consumption of electric energy.

[0141] Specifically, the communication module 104 can actively enter the sleep mode when the server is not communicating with the first CPU 105, and actively leave the sleep mode and start working when the server is communicating with the first CPU 105, so as to reduce the consumption of electric energy. Among them, the structure of the first signal conversion chip 109 is relatively simple, the power consumption is small, and there is no need to sleep.

[0142] It should also be noted that the first CPU 105 can also receive the working signal sent by the service end through the communication module 104. Specifically, upon receiving the working signal, the first CPU 105 controls the first sleep switch, the second sleep switch and the third sleep switch to be in a closed state to power on the valve motor, the second CPU 106 and the pressure sensor 107, and can trigger the first CPU 105, the first signal conversion chip 109 and the second signal conversion chip 110 to turn on the above-mentioned power-consuming devices, so that the actuator control circuit 200 performs a normal working mode.

[0143] The actuator control circuit 200 proposed in this embodiment can receive a signal sent by the service end and enter the sleep mode by setting the first sleep switch, the second sleep switch and the third sleep switch, thereby reducing the consumption of electric energy.

[0144] based on Figure 1 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, which can also include: a manual power-off module based on photoelectric induction. The manual power-off module can include: a manual wrench, a signal detection circuit and a circuit board with a photosensitive element.

[0145] The signal detection circuit is electrically connected to the circuit board and the second CPU 106 respectively;

[0146] The second CPU 106 receives the detection signal sent by the signal detection circuit;

[0147] The second CPU 106 controls the working state of the actuator according to the detection signal.

[0148] It should be noted that the actuator is usually provided with a manual power-off device, and the user can trigger the second CPU 106 to control the working state of the actuator by manually operating the manual power-off device. The manual power-off module in this embodiment is the above-mentioned manual power-off device. The prior art uses a manual power-off module based on electromagnetic induction to realize the manual power-off function. In the prior art, the manual power-off module can be set at the upper cover of the actuator. The manual power-off module includes: a manual wrench, an electromagnetic induction coil and an electromagnetic detection circuit. The manual wrench and the electromagnetic induction coil can be installed around the upper cover of the actuator. The electromagnetic induction coil and the electromagnetic detection circuit are electrically connected. The electromagnetic detection circuit and the CPU are electrically connected. When the manual wrench is inserted into the electromagnetic induction coil, the electromagnetic detection circuit can detect the current change and generate a corresponding signal to send to the CPU, so that the CPU controls the actuator to power off.

[0149] The present invention can use a circuit board with a photosensitive element to replace the above electromagnetic induction coil, and use a signal detection circuit to replace the above electromagnetic detection circuit, so as to realize the function of manually powering off the actuator based on photoelectric induction. Specifically, when the user moves the manual wrench to the position directly in front of the circuit board, the manual wrench can block the infrared reflected light emitted by the photosensitive element, so that the current in the above circuit board changes. When the signal detection circuit detects the current change in the circuit board, it sends a signal to the second CPU106, so that the second CPU106 can control the actuator to stop running; when the user moves the manual wrench to the position directly in front of the circuit board, the manual wrench does not block the infrared reflected light emitted by the photosensitive element, so that the signal detection circuit does not detect the above current change and does not send a signal to the second CPU106, so that the second CPU106 can control the actuator to be in operation.

[0150] The actuator control circuit 200 proposed in this embodiment provides the user with an operating method for manually powering off the actuator by setting a manual power-off module based on photoelectric sensing.

[0151] based on Figure 1 As shown in the circuit schematic diagram, this embodiment proposes another actuator control circuit 200, and the actuator control circuit 200 may also include: a power detection circuit 112 and an energy storage capacitor 113;

[0152] The signal detection end of the power detection circuit 112 is electrically connected to the power output end of the second voltage reduction module 103, and the signal output end of the power detection circuit 112 is electrically connected to the second CPU 106;

[0153] The energy storage capacitor 113 is electrically connected to the power output terminal of the second step-down module 103;

[0154] When the second CPU 106 receives the power off signal outputted by the signal output terminal of the power detection circuit 112 , the second CPU 106 stores the current related control parameters through the electric energy released by the energy storage capacitor 113 .

[0155] The second CPU 106 can detect the power state of the current power supply (ie, the external power supply or the energy storage battery 102 ) through the power detection circuit 112 .

[0156] The energy storage capacitor 113 can be connected in parallel in the circuit in which the second step-down circuit outputs electrical energy to the first CPU 105 and the second CPU 106. Figure 2 As shown in the circuit diagram, this embodiment proposes another actuator control circuit 200, such as Figure 6As shown, the power input terminal (+) of the energy storage battery 102 is electrically connected to the third terminal of the second step-down module 103 , and the power output terminal (−) of the energy storage battery 102 is electrically connected to the fourth terminal of the second step-down module 103 .

[0157] Specifically, when the external power supply or energy storage battery 102 is supplying power normally, part of the electric energy can be stored in the energy storage capacitor 113 while ensuring normal power supply to the first CPU 105, the second CPU 106, the communication module 104, the valve motor and other equipment, so that the energy storage capacitor 113 can supply power to the second CPU 106 when the external power supply or the energy storage battery 102 is unable to supply power.

[0158] Specifically, when the second CPU 106 detects a power-off signal through the power detection circuit 112, the second CPU 106 can determine that the current power supply (external power supply or energy storage battery 102) is powered off and cannot continue to supply power to the relevant equipment and valve motor in the actuator control circuit 200. At this time, if the switching state of the power switch is not switched in time, or another power supply (external power supply or energy storage battery 102) is also powered off and cannot supply power, the energy storage capacitor 113 can continue to supply power to the second CPU 106 in time, and the second CPU 106 can store the current control parameters and related control information (such as communication parameters with the server, control parameters for the actuator, and information on the control position fed back by the actuator) through the power provided by the energy storage capacitor 113.

[0159] It can be understood that when a pressure sensor 107, a temperature sensor 108, a first signal conversion chip 109 and a second signal conversion chip 110 are provided in the actuator control circuit 200, the second CPU 106 can store the fluid pressure detected by the pressure sensor 107 and the fluid temperature detected by the temperature sensor 108 under the power supply of the energy storage capacitor 113 after the power supply detection circuit 112 detects a power-off signal.

[0160] It should be noted that when the external power supply or the energy storage battery 102 resumes power supply to the various devices in the actuator control circuit 200, the second CPU 106 can continue to execute the control process before the power outage based on the control parameter information stored when the power was cut off, such as continuing to communicate with the server, controlling the actuator, etc., thereby improving the control efficiency of the actuator control circuit 200.

[0161] The actuator control circuit 200 proposed in this embodiment can store information on current related control parameters under the power supply of the energy storage capacitor 113 when the second CPU 106 detects a power-off signal through the power supply detection circuit 112, so that when the external power supply or the energy storage battery 102 resumes power supply, there is no need to reset the control parameters for the second CPU 106. The second CPU 106 can execute the control process before the power outage based on the control parameter information stored when the power is off, thereby improving the control efficiency of the actuator control circuit 200 over the actuator.

[0162] based on Figure 1 As shown in the circuit schematic diagram, this embodiment proposes another actuator control circuit 200, and the actuator control circuit 200 may also include: an indicator light, and the indicator light is electrically connected to the second CPU 106.

[0163] The second CPU 106 may control the display state of the indicator light according to the received actuator control information, so as to indicate the current working state of the actuator to the user through the display state of the indicator light.

[0164] The indicator light in this embodiment can emit light of one or more colors, which is not limited in the present invention. For example, the indicator light can emit light of two colors, green and red.

[0165] The display status of the indicator light may include the color of the light emitted by the indicator light, the flashing frequency, etc.

[0166] Specifically, when the second CPU 106 receives the actuator control information sent by the server, it can first identify the information category of the actuator control information, and then control the indicator light to display the corresponding preset display state according to the information category of the actuator control information, and indicate the current working state of the actuator to the user through the display state of the indicator light.

[0167] Specifically, the second CPU 106 can control the display state of the indicator light according to the information category of the actuator control information sent by the server. After receiving the actuator control information sent by the server, the second CPU 106 can first identify the information category of the actuator control information, and then control the indicator light to display the corresponding preset display state according to the information category. For example, if the second CPU 106 identifies that the information category of the actuator control information sent by the server is an actuator self-test signal, the second CPU 106 will control the indicator light to display the preset display state corresponding to the actuator self-test signal; for another example, if the second CPU 106 identifies that the information category of the actuator control information sent by the server is an action stop signal, the second CPU 106 will control the indicator light to display the preset display state corresponding to the action stop signal.

[0168] Specifically, the second CPU 106 may also control the display state of the indicator light according to the information type of the actuator control information sent by the mobile terminal.

[0169] It is understandable that the second CPU 106 can also control the indicator light display state according to other information sent by the mobile terminal. For example, the second CPU 106 can control the indicator light to display a corresponding preset display state according to the above wake-up signal sent by the mobile terminal.

[0170] The actuator control circuit 200 proposed in this embodiment can control the indicator light to display a corresponding preset display state according to the information sent by other devices by the second CPU 106, so as to indicate the current working state of the actuator to the user, thereby enriching the interaction mode with the user.

[0171] based on Figure 5 The actuator control circuit 200 shown in the embodiment proposes another actuator control method. In this method, a wake-up button can be set on the actuator. The actuator control circuit 200 also includes: a wake-up circuit, and the first CPU 105 is electrically connected to the wake-up button through the wake-up circuit.

[0172] After the first CPU 105 controls the first sleep switch, the second sleep switch and the third sleep switch to be turned off, the method may further include the following steps: Figure 7 As shown:

[0173] S10 . When the first CPU 105 detects an electrical signal generated when the user presses the wake-up button, the first CPU 105 controls the second sleep switch and the third sleep switch to close, so that the second CPU 106 and the pressure sensor 107 are powered on.

[0174] It should be noted that after the first CPU 105 receives the sleep signal and controls the actuator control circuit 200 to be in the sleep mode, the user can wake up the actuator control circuit 200 by pressing the wake-up button.

[0175] Specifically, when the user presses the wake-up button, the wake-up circuit can be triggered to generate a corresponding electrical signal and send it to the first CPU 105. After detecting the electrical signal, the first CPU 105 can control the second sleep switch and the third sleep switch to close, so that the second CPU 106 and the pressure sensor 107 are powered on.

[0176] S20, the first CPU 105 sends a detection enable signal to the pressure sensor 107 through the first signal conversion chip 109 to trigger the pressure sensor 107 to perform detection; the first CPU 105 sends a detection enable signal to the temperature sensor 108 through the second signal conversion chip 110 to trigger the temperature sensor 108 to perform detection.

[0177] Specifically, after the second CPU 106 and the pressure sensor 107 are powered on, the first CPU 105 can send a detection enable signal to the control pressure sensor 107 and the temperature sensor 108 through the first signal conversion chip 109 and the second signal conversion chip 110, respectively, to trigger the pressure sensor 107 and the temperature sensor 108 to detect the fluid in the pipeline where the valve is located.

[0178] S30 , the pressure sensor 107 sends the detected pressure value to the first CPU 105 through the first signal conversion chip 109 , and the temperature sensor 108 sends the detected temperature value to the first CPU 105 through the second signal conversion chip 110 .

[0179] Specifically, after detecting the pressure value of the fluid, the pressure sensor 107 can send the detected pressure value of the fluid to the first CPU 105 through the first signal conversion chip 109, so that the first CPU 105 obtains the pressure value of the fluid; after detecting the temperature value of the fluid, the temperature sensor 108 can send the detected temperature value of the fluid to the first CPU 105 through the second signal conversion chip 110, so that the first CPU 105 obtains the temperature value of the fluid.

[0180] S40, the first CPU 105 sends the obtained pressure value and temperature value to the user's mobile terminal through the second CPU 106 and the NFC module 111 for display, and controls the second sleep switch and the third sleep switch to be disconnected, so that the second CPU 106 and the pressure sensor 107 are powered off.

[0181] Specifically, after obtaining the pressure value and temperature value of the fluid, the first CPU 105 may send the pressure value and temperature value of the fluid to the NFC module 111 of the actuator control circuit 200 , and the NFC module 111 sends the pressure value and temperature value of the fluid to the user's mobile terminal.

[0182] The mobile terminal may be a mobile terminal with an NFC function and a heating control-related application installed. It should be noted that the mobile terminal may be an electronic device such as a mobile phone or a tablet computer.

[0183] It is understandable that after pressing the wake-up button, the user can bring the mobile terminal with the above application program turned on close to the NFC identification area of ​​the NFC module 111 of the actuator control circuit 200. At this time, the first CPU 105 can send the pressure value and temperature value of the fluid to the interface of the user's mobile terminal through the second CPU 106 and the NFC module 111 in sequence for display. Afterwards, the present invention can re-control the actuator control circuit 200 to enter the sleep mode, that is, control the second sleep switch and the third sleep switch to be disconnected to reduce the consumption of electric energy.

[0184] The actuator control method proposed in this embodiment can provide a method for the user to wake up the actuator control circuit 200 in the sleep mode, thereby enriching the interaction method between the user and the actuator control circuit 200.

[0185] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0186] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. An actuator control circuit, characterized in that: The actuator control circuit includes: a rectifier filter circuit, a first step-down module, an energy storage battery, a power switch, a second step-down module, a first CPU, a communication module and a second CPU; The power input end of the rectifying and filtering circuit is a power connection end, and the power output end of the rectifying and filtering circuit is electrically connected to the power input end of the first step-down module; The power output end of the first step-down module is electrically connected to the first end of the power switch; The power output end of the energy storage battery is electrically connected to the second end of the power switch; The third end of the power switch is the power supply end of the actuator, and the power supply end of the actuator is the power input end of the valve motor in the actuator; the third end of the power switch is electrically connected to the power input end of the second step-down module; When the power switch is operating in a first switching state, the third end of the power switch is electrically connected to the first end of the power switch; when the power switch is operating in a second switching state, the third end of the power switch is electrically connected to the second end of the power switch; The power output end of the second step-down module is electrically connected to the first CPU and the second CPU respectively; The first CPU is connected to the server through the communication module; The second CPU is respectively connected to the first CPU and the execution mechanism for communication; The first CPU receives the actuator control information sent by the server through the communication module, and the first CPU forwards the actuator control information to the second CPU; The second CPU controls the working state of the actuator according to the received actuator control information; The actuator control circuit also includes: a pressure sensor, a temperature sensor, a first signal conversion chip and a second signal conversion chip; The power output end of the second voltage reduction module is electrically connected to the pressure sensor, the first signal conversion chip and the second signal conversion chip respectively; The pressure sensor is communicatively connected to the first CPU via the first signal conversion chip; The temperature sensor is connected to the first CPU through the second signal conversion chip; The actuator control circuit also includes: a near field communication NFC module; The power output terminal of the second step-down module is electrically connected to the NFC module; The NFC module is respectively connected to the second CPU and the user's mobile terminal for communication; The NFC module receives the actuator control information sent by the mobile terminal, and sends the received actuator control information to the second CPU; The second CPU controls the working state of the actuator according to the actuator control information sent by the NFC module; The actuator control circuit further includes: a first sleep switch, a second sleep switch and a third sleep switch; The third end of the power switch is electrically connected to the power supply end of the actuator through the first sleep switch; The power output end of the second voltage reduction module is electrically connected to the second CPU via a second sleep switch; The power output end of the second voltage reduction module is electrically connected to the pressure sensor via a third sleep switch; The first CPU is respectively connected to the first sleep switch, the second sleep switch and the third sleep switch in communication; After receiving the sleep signal sent by the service end, the first CPU controls the first sleep switch, the second sleep switch and the third sleep switch to be turned off so that the valve motor in the actuator, the second CPU and the pressure sensor are powered off; After receiving the working signal sent by the service end, the first CPU controls the first sleep switch, the second sleep switch and the third sleep switch to be closed, so that the valve motor in the actuator, the second CPU and the pressure sensor are powered on; The actuator control circuit further includes: a manual power-off module based on photoelectric induction; the manual power-off module includes: a manual wrench, a signal detection circuit and a circuit board provided with a photosensitive element; The signal detection circuit is electrically connected to the circuit board and the second CPU respectively; The second CPU receives the detection signal sent by the signal detection circuit; The second CPU controls the working state of the actuator according to the detection signal; The actuator control circuit also includes: a power detection circuit and an energy storage capacitor; The signal detection end of the power detection circuit is electrically connected to the power output end of the second step-down module, and the signal output end of the power detection circuit is electrically connected to the second CPU; The energy storage capacitor is electrically connected to the power output terminal of the second step-down module; When the second CPU receives a power-off signal outputted from the signal output terminal of the power detection circuit, the second CPU stores current related control parameters through the electric energy released by the energy storage capacitor.

2. The actuator control circuit according to claim 1, characterized in that: The communication module is a narrowband Internet of Things NB-IoT communication module; The power output end of the second step-down module is electrically connected to the NB-IoT communication module.

3. The actuator control circuit according to claim 1, characterized in that: The communication module includes: a 4G / 5G to RS485 communication module and an RS485 communication circuit; The first CPU is connected to the server through the RS485 communication circuit and the 4G / 5G to RS485 communication module in turn.

4. The actuator control circuit according to claim 1, characterized in that: The communication module includes: a LoRa communication module and a LoRa to 4G / 5G communication module; The first CPU is connected to the server through the LoRa communication module and the LoRa to 4G / 5G communication module in sequence.

5. A method for controlling an actuator, characterized in that: The actuator control method is applied to the actuator control circuit according to any one of claims 1 to 4, wherein the actuator is provided with a wake-up button, and the actuator control circuit further comprises: a wake-up circuit, wherein the first CPU is electrically connected to the wake-up button through the wake-up circuit; After the first CPU controls the first sleep switch, the second sleep switch, and the third sleep switch to be turned off, the actuator control method further includes: When the first CPU detects an electrical signal generated by the user pressing the wake-up button, the first CPU controls the second sleep switch and the third sleep switch to close, so that the second CPU and the pressure sensor are powered on; The first CPU sends a detection enable signal to the pressure sensor through the first signal conversion chip to trigger the pressure sensor to perform detection; the first CPU sends a detection enable signal to the temperature sensor through the second signal conversion chip to trigger the temperature sensor to perform detection; The pressure sensor sends the detected pressure value to the first CPU through the first signal conversion chip, and the temperature sensor sends the detected temperature value to the first CPU through the second signal conversion chip; The first CPU sends the obtained pressure value and temperature value to the user's mobile terminal through the second CPU and the NFC module in sequence for display, and controls the second sleep switch and the third sleep switch to be disconnected, so that the second CPU and the pressure sensor are powered off.

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