Air valve actuator control system based on LORA wireless communication

Abstract

The utility model relates to an air valve actuator control system based on LORA wireless communication, which comprises a host connected with an upper computer and a plurality of actuators, the host is in wireless connection with the actuators in a communication range through an LORA wireless module, each actuator is used as a sub-machine, and each sub-machine is connected with the corresponding actuator. And the LORA wireless module is wirelessly connected with other actuators in the communication range. According to the utility model, the tedious signal line wiring link of the traditional actuator can be saved, and meanwhile, the problem of poor signal caused by large-area metal coverage in an interlayer and a pipeline shaft of a building is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to building ventilation, air conditioner actuator control technical field, especially, it relates to a kind of wind valve actuator control system based on LORA wireless communication. BACKGROUND

[0002] At present, the switch and opening degree of various wind valves, water valve actuators are switch quantity, analog quantity, 485 communication mode control with wiring control, a large amount of wiring is needed to complete the control of each valve actuator during installation, which is difficult and high in cost. If wireless mode is directly used, wireless signal is poor due to large area of metal covering in building interlayer and pipe shaft, and a large number of hosts need to be laid, resulting in high cost. INVENTION CONTENTS

[0003] The utility model solves the technical problem to provide a kind of wind valve actuator control system based on LORA wireless communication, can save the signal line wiring link of traditional actuator tedious.

[0004] The technical scheme adopted by the utility model to solve its technical problems is: provide a kind of wind valve actuator control system based on LORA wireless communication, including a host connected with host computer and multiple actuators, the host is connected wirelessly with the actuator in communication range by LORA wireless module, each actuator is as submachine, and is wirelessly connected with other actuators in communication range by LORA wireless module.

[0005] The actuator includes the main control module formed by single-chip microcomputer, and the main control module is connected with LORA wireless module, power supply module and motor drive module respectively.

[0006] The LORA wireless module uses A32-S400A22S2A chip.

[0007] The power supply module includes buck circuit and voltage stabilizing circuit, the buck circuit is used to convert 24V weak electric signal into 12V voltage signal, and the voltage stabilizing circuit is used to stabilize the 12V voltage signal to 3.3V voltage signal.

[0008] The motor drive module uses AS4950 drive chip.

[0009] The host includes main control MCU, the main control MCU is connected with the host computer through serial port, and is connected with the actuator with distance less than threshold value through LORA wireless module.

[0010] Advantages

[0011] Compared with the prior art, the utility model discloses the following advantages and positive effects: the host computer is connected with the actuator through the LORA wireless module in the utility model, and the actuator can be connected as a submachine to bridge data, thereby greatly increasing the networking range and communication distance, so that the host computer can adopt the LORA wireless module to distribute the instruction of the upper computer to the corresponding actuator through the signal transmission mode, thereby realizing the control of the actuator. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the block diagram of the air valve actuator control system based on the LORA wireless communication of the utility model embodiment;

[0013] Figure 2 is the connection block diagram of the host computer in the utility model embodiment;

[0014] Figure 3 is the connection block diagram of the actuator in the utility model embodiment;

[0015] Figure 4 is the circuit diagram of the main control module of the actuator in the utility model embodiment;

[0016] Figure 5 is the circuit diagram of the LORA wireless module in the utility model embodiment;

[0017] Figure 6 is the circuit diagram of the power supply module in the utility model embodiment;

[0018] Figure 7 is the circuit diagram of the motor drive module in the utility model embodiment. DETAILED DESCRIPTION

[0019] The utility model will be further explained in combination with specific embodiment. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, the person skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to the present application.

[0020] The utility model embodiment relates to an air valve actuator control system based on LORA wireless communication, such as Figure 1As shown, it includes a host computer connected to a host computer and multiple actuators. The host computer wirelessly connects to the actuators within the communication range via a LoRa wireless module. Each actuator acts as a slave device, wirelessly connecting to other actuators within the communication range via a LoRa wireless module.

[0021] like Figure 2 As shown, in this embodiment, the host includes a main control MCU, which is connected to the host computer via a serial port and to the actuator whose distance is less than a threshold via a LoRa wireless module. Figure 3 As shown, the actuator in this embodiment includes a main control module composed of a single chip. The main control module is connected to the LoRa wireless module, the power supply module, the motor drive module and the address setting module. The address setting module is an input device through which the address of the actuator can be preset.

[0022] like Figure 4 As shown, in this embodiment, the main control module of the actuator can be an STM32 microcontroller. Its first pin is connected to the power supply, the seventh pin is connected to the power supply through a resistor R11 and grounded through a capacitor C14, the eighth pin is grounded and connected to the power supply through a capacitor C13, the ninth pin is connected to the power supply and grounded through a capacitor C15, a capacitor C5 is connected between the twenty-third and twenty-fourth pins, the twenty-third pin is also grounded, the twenty-fourth pin is connected to the power supply, the forty-fourth pin is connected to the power supply through a resistor R22, the forty-seventh pin is grounded, and the forty-eighth pin is connected to the power supply.

[0023] like Figure 5 As shown, the LORA wireless module uses the A32-S400A22S2A chip. Its first pin is connected to the power supply through an inductor CZ2 and grounded through a capacitor C2. The second pin is grounded. The eleventh and twelfth pins are connected to the thirtieth and thirty-first pins of the STM32 microcontroller, respectively. The thirteenth pin is connected to the twenty-ninth pin of the STM32 microcontroller. The fourteenth pin is connected to the twenty-fifth pin of the STM32 microcontroller. The fifteenth pin is connected to the twenty-sixth pin of the STM32 microcontroller. The sixteenth pin is connected to the twenty-eighth pin of the STM32 microcontroller. The seventeenth pin is connected to the twenty-seventh pin of the STM32 microcontroller. The eighteenth pin is connected to the thirty-third pin of the STM32 microcontroller.

[0024] The power supply module in this embodiment includes a step-down circuit and a voltage regulator circuit. The step-down circuit converts a 24V weak current signal into a 12V voltage signal, and the voltage regulator circuit regulates the 12V voltage signal to a 3.3V voltage signal. Figure 6As shown, the voltage reduction circuit adopts the MC34063 chip, the first pin, the eighth pin and the seventh pin are connected with one end of the resistor Rsc1, the sixth pin is connected with the other end of the resistor Rsc1, the fourth pin is grounded, the third pin is grounded through the capacitor C8, the second pin is connected with one end of the inductor L1, the fifth pin is connected with the resistor R1, the other end of the resistor R1 is connected with the other end of the inductor L1, the second pin is also grounded through the voltage stabilizing tube D2, and the fifth pin is also grounded through the resistor R2. The voltage stabilizing circuit adopts the AMS1117_3.3 chip, the first pin is grounded, the second pin is grounded through the capacitor C3, and the third pin is connected with the other end of the inductor L1.

[0025] The motor driving module in the embodiment can adopt the AS4950 driving chip, the first pin is grounded, the second pin and the third pin are connected with the sixteenth pin and the seventeenth pin of the STM32 single-chip microcomputer respectively, the fourth pin is connected with the power supply through the resistor R12, the fifth pin is grounded through the parallel connection of the capacitor C9 and the capacitor C10, and is also connected with the power supply, the sixth pin and the eighth pin are connected with the motor as output ends, the seventh pin is grounded through the resistor R7, and the ninth pin is grounded.

[0026] In the embodiment, the host machine is responsible for receiving the instructions of the upper computer, and sends the received instructions to the actuator as a slave machine through the LORA wireless module. When the slave machine receives the wireless signal, it is judged through the address bit in the instruction whether the information is sent to the local machine. If yes, the receiving success instruction is sent, and the instruction content is compared with the valve state of the local machine. If the valve state of the local machine is inconsistent, the motor module is driven to rotate the valve to the state set by the instruction. If the instruction is not sent to the local machine, the received instruction is sent out as it is, and at this time the slave machine is used as a signal bridge repeater.

[0027] Suppose that there is one host machine and 10 slave machines in the system of the embodiment, and the machines are numbered from 01 to 10 according to the distance from the host machine. The valve opening degrees of all the slave machines are now 100%. At this time, the upper computer sends the host machine to set the opening degree of the No. 05 slave machine to 50%. After receiving the instruction, the host machine sends the instruction through the LORA wireless module. If the No. 01 machine receives the signal, the instruction is sent as it is through the LORA wireless module of the No. 01 machine, and is sent to other slave machines within the signal effective range of the No. 01 machine as a bridge signal. In this mode, until the No. 05 machine receives the signal, the receiving signal success instruction is sent, and the motor module is driven to operate the actuator to the preset 50% opening degree. Thus, one actuator operation instruction is executed.

[0028] It is not difficult to find that the host is connected with the actuator through the LORA wireless module, and the actuator can be connected as a submachine to bridge the data, thereby greatly increasing the networking range and communication distance, so that the host can adopt the LORA wireless module to distribute the instructions of the upper computer to the corresponding actuator through the signal transmission mode, thereby realizing the control of the actuator. This mode can be completed by only two weak current 24V power lines, thereby saving the cumbersome signal line wiring link of the traditional actuator, and the whole system only needs one host, and the signal connection problem caused by the large-area metal covering in the building interlayer and pipe shaft is solved by the actuator as a submachine, thereby reducing the investment cost.

Claims

1. A wind valve actuator control system based on LORA wireless communication, characterized in that, It includes a host connected with the upper computer and a plurality of actuators, the host is wirelessly connected with the actuators in the communication range through a LORA wireless module, each actuator is as a slave machine and is wirelessly connected with other actuators in the communication range through a LORA wireless module.

2. The LORA wireless communication based wind valve actuator control system as claimed in claim 1, wherein, The actuator includes a master control module formed by a single chip, and the master control module is connected with a LORA wireless module, a power supply module and a motor drive module respectively.

3. The LORA wireless communication based wind valve actuator control system as claimed in claim 2, wherein, The LORA wireless module adopts an A32-S400A22S2A chip.

4. The LORA wireless communication based wind valve actuator control system according to claim 2, wherein, The power supply module includes a voltage reduction circuit and a voltage stabilization circuit, the voltage reduction circuit is used for converting a 24V weak electric signal into a 12V voltage signal, and the voltage stabilization circuit is used for stabilizing the 12V voltage signal to a 3.3V voltage signal.

5. The LORA wireless communication based wind valve actuator control system according to claim 2, wherein, The motor drive module adopts an AS4950 drive chip.

6. The LORA wireless communication based wind valve actuator control system according to claim 1, wherein, The host includes a master control MCU, the master control MCU is connected with the upper computer through a serial port and is connected with the actuators with a distance less than a threshold through a LORA wireless module.

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