An intelligent fan control system

Abstract

The utility model provides a kind of intelligent fan control system, including main control module, environment detection module, man-machine interaction module, execution module, wireless communication module and power module;Main control module uses STM32F103C8T6 single-chip microcomputer;Environment detection module includes DHT11 temperature and humidity sensor and infrared pyroelectric sensor;Man-machine interaction module includes physical button, OLED display screen, voice recognition module and gesture recognition module;Execution module includes DC motor and triode drive circuit;Power module is the power supply for each corresponding module in system.The utility model passes through the hardware circuit structure of optimization, integrates multiple sensors and interaction module, realizes a kind of intelligent fan control solution without relying on complex network, response is fast, control mode is various and stable operation.

Description

Technical Field

[0001] This utility model belongs to the field of fan control technology, and specifically relates to an intelligent fan control system. Background Technology

[0002] Traditional fans are usually controlled by mechanical buttons or remote controls, which are limited in function, only able to turn on and off and adjust a limited number of speeds. They cannot operate automatically according to environmental conditions, resulting in a poor user experience.

[0003] With the development of IoT and smart home technologies, some fans with basic intelligent functions have emerged on the market. For example, some fans have added the ability to be remotely controlled via a mobile app, or integrated temperature sensors, enabling simple control based on a single environmental parameter. However, such solutions still have significant shortcomings: First, many so-called intelligent controls heavily rely on mobile apps and cloud servers; once the network fails or the user does not have their phone, the convenience of control is greatly reduced. Second, the control methods are relatively simple, failing to integrate multiple natural and convenient interaction methods. Third, the hardware architecture of the system is often poorly described, and the coordination relationships between various functional modules are unclear, resulting in limited intelligence, insufficient responsiveness, and room for improvement in the overall system stability and reliability.

[0004] Furthermore, some existing smart fan designs have room for improvement in hardware architecture. For example, the connections between the sensing module, control module, and execution module are not optimized enough, which may lead to unstable signal transmission; the power supply design is not detailed enough and fails to fully consider the different operating voltage requirements of different components, affecting the overall energy efficiency and stability of the system.

[0005] Therefore, there is an urgent need in this field for an intelligent fan control system with a well-defined hardware structure, integrating multiple control methods, capable of intelligently sensing the environment and responding automatically, and operating stably and reliably. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent fan control system. Through optimized hardware circuit construction, it integrates multiple sensors and interaction modules to achieve an intelligent fan control solution that does not rely on complex networks, responds quickly, offers diverse control methods, and operates stably.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An intelligent fan control system includes a main control module, an environmental detection module, a human-machine interaction module, an execution module, a wireless communication module, and a power supply module; wherein:

[0009] The main control module uses an STM32F103C8T6 microcontroller.

[0010] The environmental detection module includes a DHT11 temperature and humidity sensor and an infrared pyroelectric sensor, whose signal output terminals are respectively connected to different IO pins of the main control module.

[0011] The human-computer interaction module includes physical buttons, an OLED display, a voice recognition module, and a gesture recognition module; the outputs of the physical buttons and the voice recognition module are connected to different IO pins of the main control module; the OLED display and the gesture recognition module are connected to the main control module via an I2C bus.

[0012] The execution module includes a DC motor and a transistor drive circuit, and the control terminal of the transistor drive circuit is connected to an IO pin of the main control module.

[0013] The power module is used to provide two voltages, 3.3V and 5V, and to power the corresponding modules in the system.

[0014] Furthermore, the power module provides 3.3V to power the main control module, gesture recognition module, and OLED display; and 5V to power the DHT11 temperature and humidity sensor, infrared pyroelectric sensor, voice recognition module, and DC motor.

[0015] Furthermore, the data pin of the DHT11 temperature and humidity sensor is connected to a pull-up resistor and is connected to the PA4 pin of the STM32F103C8T6 microcontroller.

[0016] Furthermore, in the transistor driving circuit, the base of the transistor is connected to the PA1 pin of the STM32F103C8T6 microcontroller through a current-limiting resistor.

[0017] Furthermore, the execution module also includes an LED light connected in parallel with the DC motor.

[0018] Furthermore, the voice recognition module adopts the LU-ASR01 module, which is connected to the PB10 and PB11 pins of the STM32F103C8T6 microcontroller.

[0019] Furthermore, the gesture recognition module uses an APDS-9960 sensor, which is connected to the PB6 and PB7 pins of the STM32F103C8T6 microcontroller.

[0020] Furthermore, the OLED display is connected to the PA11 and PA12 pins of the STM32F103C8T6 microcontroller.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) Diversified and intelligent control methods: By integrating multiple input methods such as gestures, voice, buttons and environmental perception in hardware, users can choose the most convenient control method according to different scenarios, realizing true contactless and intelligent interaction and improving user experience.

[0023] (2) Clear hardware structure and stable and reliable operation: This invention clarifies the hardware architecture with the STM32 microcontroller as the core and the functional modules connected through specific methods (direct I / O, I2C, serial port). The design of key circuits (such as pull-up resistors and current-limiting resistors) ensures signal quality and component safety, making the entire system structure clear, with strong anti-interference ability and stable operation.

[0024] (3) The power supply scheme is efficient and reasonable: the power supply module provides dual voltages of 3.3V and 5V and accurately distributes them to different loads, which not only meets the voltage requirements of all components, but also avoids energy waste and potential equipment damage risks, thus optimizing the system's energy efficiency and reliability.

[0025] (4) High degree of modularity, easy to implement and expand: The system adopts a modular design, with each functional module being relatively independent and interconnected through a standard interface. This not only facilitates the assembly, debugging and maintenance of the system, but also leaves a convenient hardware interface for future functional expansion (such as adding new sensors). Attached Figure Description

[0026] Figure 1 This is a block diagram of the overall hardware structure of the intelligent fan control system of this utility model.

[0027] Figure 2 This is the circuit schematic diagram of the main control module of this utility model.

[0028] Figure 3 This is the schematic diagram of the power supply circuit of this utility model.

[0029] Figure 4 This is the circuit diagram of the DHT11 temperature and humidity sensor module of this utility model.

[0030] Figure 5 This is the circuit diagram of the infrared pyroelectric sensor module of this utility model.

[0031] Figure 6 This is the circuit diagram of the button module of this utility model.

[0032] Figure 7 This is the circuit schematic diagram of the display module of this utility model.

[0033] Figure 8 This is the circuit schematic diagram of the execution module of this utility model.

[0034] Figure 9This is the schematic diagram of the interface circuit of the gesture recognition module of this utility model.

[0035] Figure 10 This is a schematic diagram of the 5V cooling fan and LED light control circuit of this utility model. Detailed Implementation

[0036] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings. This description aims to clearly and completely depict the hardware structure of this utility model, enabling any person skilled in the art to reproduce it without creative effort based on this description.

[0037] Reference Figure 1 The intelligent fan control system of this utility model consists of six major hardware modules: a main control module, an environmental detection module, a human-machine interaction module, an execution module, a wireless communication module, and a power supply module. These modules form a complete hardware system through defined physical and electrical connections, achieving hardware integration of multiple control methods and environmental sensing.

[0038] Reference Figure 2 The main control module uses an STM32F103C8T6 microcontroller as the system's control core. This module provides a unified hardware platform for signal processing and instruction distribution. To ensure the microcontroller's normal operation, its peripherals include essential circuits known in the field, such as a clock circuit composed of a crystal oscillator and load capacitors, a reset circuit composed of pull-up resistors and capacitors, a power supply filter circuit composed of multiple decoupling capacitors distributed at the power supply pins, a BOOT configuration circuit for selecting the boot mode, and a standard SWD program download interface. This module establishes physical connections with other functional modules through its multiple general-purpose I / O pins, I2C bus, and serial port to achieve unified signal scheduling.

[0039] Reference Figure 3 The core function of the power module is to convert and distribute the externally input 5V DC power supply into the two operating voltages required by the system: 3.3V and 5V. Its core component is a low-dropout linear regulator. Electrolytic and ceramic capacitors are connected in parallel at the regulator's input for input filtering; similarly, electrolytic and ceramic capacitors are connected in parallel at the output for output filtering to provide a stable 3.3V voltage. An LED is connected to the 3.3V output terminal through a current-limiting resistor as a power status indicator.

[0040] The function of the environmental monitoring module is to collect environmental physical parameters in real time and provide environmental status information for the system, including the DHT11 sensor circuit and the infrared pyroelectric circuit.

[0041] Reference Figure 4The DHT11 sensor circuit is responsible for detecting ambient temperature and humidity. Its data pin is connected to a pull-up resistor and is connected to the PA4 pin of the STM32F103C8T6 microcontroller. Its power supply pin is connected to a 5V power supply, and its ground pin is grounded.

[0042] Reference Figure 5 The infrared pyroelectric circuit is responsible for detecting the presence of a human body. Its signal output pin is connected to the PA5 pin of the STM32F103C8T6 microcontroller, its power supply pin is connected to a 5V power supply, and its ground pin is grounded.

[0043] The human-computer interaction module provides a variety of user operation interfaces and status display functions, including button circuits, OLED display circuits, gesture recognition circuits, and voice recognition circuits.

[0044] Reference Figure 6 Button circuit: One end of multiple tactile switches is connected to different IO pins of the STM32F103C8T6 microcontroller, and the other end is grounded together.

[0045] Reference Figure 7 The OLED display circuit is responsible for displaying system status information. It is connected to the main control module via the I2C bus, specifically to the PA11 and PA12 pins of the STM32F103C8T6 microcontroller. Its power supply pin is connected to a 3.3V power supply, and its ground pin is grounded.

[0046] Reference Figure 9 The gesture recognition circuit realizes non-contact gesture recognition, adopts the APDS-9960 sensor, and is connected to the main control module through the I2C bus. Specifically, it is connected to the PB6 and PB7 pins of the STM32F103C8T6 microcontroller. Its power supply pin is connected to the 3.3V power supply, and the ground pin is grounded.

[0047] The voice recognition circuit provides voice control functionality and uses the LU-ASR01 module, which is connected to the PB10 and PB11 pins of the STM32F103C8T6 microcontroller. Its power supply pin is connected to a 5V power supply, and its ground pin is grounded.

[0048] Reference Figure 8 and Figure 10 The execution module drives the fan to operate according to control signals and provides status indications. It includes a DC motor and a transistor driver circuit. In the transistor driver circuit, the base of the transistor is connected to the PA1 pin of the STM32F103C8T6 microcontroller through a current-limiting resistor. It also includes an LED, which is connected in parallel with the DC motor and synchronously driven by the transistor driver circuit.

[0049] The wireless communication module uses the HC-05 Bluetooth module, which connects to the main control module via a serial port. Specifically, it connects to the PA9 and PA10 pins of the STM32F103C8T6 microcontroller. Its power supply pin is connected to a 5V power supply, and its ground pin is grounded.

[0050] The system power supply network adopts a clear voltage distribution scheme to ensure that each module receives the appropriate operating voltage:

[0051] A 3.3V voltage powers the main control module, gesture recognition module, and OLED display.

[0052] The 5V voltage powers the DHT11 temperature and humidity sensor, infrared pyroelectric sensor, voice recognition module, DC motor, and LED light.

[0053] The entire operation of this invention is based on the aforementioned hardware structure. Users can issue control commands through various means, such as gesture recognition, voice recognition, and physical buttons. The corresponding hardware modules convert these commands into electrical signals, which are then transmitted through a defined hardware connection with the main control module. The environmental detection module continuously feeds back environmental information to the main control module via its hardware connection. The main control module integrates the signals from each hardware channel and controls the transistor drive circuit in the execution module through its I / O pins, thereby achieving the final control of the DC motor and LED lights. The entire process relies entirely on the aforementioned defined hardware structure and connection relationships.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent fan control system, characterized in that, It includes a main control module, an environmental monitoring module, a human-machine interaction module, an execution module, a wireless communication module, and a power supply module; among which: The main control module uses an STM32F103C8T6 microcontroller. The environmental detection module includes a DHT11 temperature and humidity sensor and an infrared pyroelectric sensor, whose signal output terminals are respectively connected to different IO pins of the main control module. The human-computer interaction module includes physical buttons, an OLED display, a voice recognition module, and a gesture recognition module; the outputs of the physical buttons and the voice recognition module are connected to different IO pins of the main control module; the OLED display and the gesture recognition module are connected to the main control module via an I2C bus. The execution module includes a DC motor and a transistor drive circuit, and the control terminal of the transistor drive circuit is connected to an IO pin of the main control module. The power module is used to provide two voltages, 3.3V and 5V, and to power the corresponding modules in the system.

2. The intelligent fan control system according to claim 1, characterized in that, The power module provides 3.3V to power the main control module, gesture recognition module, and OLED display; and 5V to power the DHT11 temperature and humidity sensor, infrared pyroelectric sensor, voice recognition module, and DC motor.

3. The intelligent fan control system according to claim 1, characterized in that, The data pins of the DHT11 temperature and humidity sensor are connected to pull-up resistors and are connected to the PA4 pin of the STM32F103C8T6 microcontroller.

4. The intelligent fan control system according to claim 1, characterized in that, In the transistor driving circuit, the base of the transistor is connected to the PA1 pin of the STM32F103C8T6 microcontroller through a current-limiting resistor.

5. The intelligent fan control system according to claim 1, characterized in that, The execution module also includes an LED light, which is connected in parallel with the DC motor.

6. The intelligent fan control system according to claim 1, characterized in that, The voice recognition module uses the LU-ASR01 module, which is connected to the PB10 and PB11 pins of the STM32F103C8T6 microcontroller.

7. The intelligent fan control system according to claim 1, characterized in that, The gesture recognition module uses an APDS-9960 sensor, which is connected to the PB6 and PB7 pins of the STM32F103C8T6 microcontroller.

8. The intelligent fan control system according to claim 1, characterized in that, The OLED display is connected to the PA11 and PA12 pins of the STM32F103C8T6 microcontroller.

Images