CN117850306A - Intelligent sensing and control system for Internet of things in intelligent park - Google Patents

Abstract

The present invention relates to the field of smart campus technology, and discloses a smart campus Internet of Things intelligent perception and control system, which is composed of a temperature and humidity sensor module, a smoke sensor module, a motor drive module, a stepper motor drive module, an OLED display module, a pyroelectric infrared sensor module, a buzzer alarm module, a WIFI module and a power module. The smart campus Internet of Things intelligent perception and control system can collect temperature, humidity and smoke concentration in a classroom in real time, and display real-time perception data through an OLED, automatically turn on a DC motor to control a fan when the temperature is too high, and automatically respond to a buzzer alarm when a fire occurs; at the same time, pyroelectric sensing of human body infrared is used to automatically turn on the lights after someone enters the classroom, and automatically turn off the facilities and equipment in the classroom when no one is in the classroom; the administrator can remotely control the lighting, fans and curtains controlled by stepper motors in the classroom through a mobile phone, which is conducive to intelligent management of the classroom and achieves the purpose of energy saving.

Description

A smart park Internet of Things intelligent perception and control system

Technical Field

The present invention relates to the technical field of smart campus, and in particular to an intelligent perception and control system of the Internet of Things for a smart campus.

Background technique

Science and technology are changing with each passing day. The advent of the intelligent era has provided good technical support for the establishment of smart classrooms and smart campuses in Chinese universities. At present, most university classrooms in my country have widely used advanced technical equipment such as multimedia integrated smart boards and interactive digital projectors. In the future, these devices will further evolve into smart classrooms that integrate multimedia, teaching platforms, monitoring, and IoT sensors to meet the various needs of education and teaching and student management.

Through communication technology, various information-related communication devices are integrated into one or more main terminals for control, and various non-communication devices are also managed intelligently using technologies such as the Internet and automation. In addition, the Internet of Things technology can effectively regulate environmental factors inside the classroom, including noise, temperature, odor, light, etc. At the same time, the curtain control function in the classroom is also an important part. The curtain control system of the smart classroom is based on the original traditional curtains, using the Internet of Things technology and sensor technology to intelligently control and adjust the classroom curtains. It will greatly facilitate classroom management and improve the teaching environment of teachers and students.

With the introduction of various new technologies, smart classrooms have taken shape when classrooms were first built in major universities. With the update and iteration of technology, how to apply the Internet of Things technology to design a set of automatic operation management strategies suitable for smart classroom environment facilities, so as to achieve the goal of improving the teaching environment while saving energy and manpower, and improving the efficiency and quality of teaching management services. As for the current technology, smart classrooms can be updated on a large scale to realize functions such as smart fire protection, smart equipment management, smart teaching, and smart environment control to improve the convenience and versatility of the teaching environment. This application now proposes a smart campus Internet of Things intelligent perception and control system.

Summary of the invention

1. Technical issues to be solved

In view of the shortcomings of the existing technology, the present invention provides a smart park Internet of Things intelligent perception and control system, which has the advantages of intelligent monitoring and convenient management, and solves the problem of imperfect management of the teaching environment.

(II) Technical solution

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a smart park Internet of Things intelligent perception and control system, including system hardware design and system software design, the system hardware design includes a single-chip microcomputer circuit, a smoke concentration acquisition circuit, a buzzer alarm circuit, a temperature and humidity acquisition circuit, an OLED display circuit, a motor drive circuit, a stepper motor drive circuit, a pyroelectric infrared sensor circuit, a WIFI communication circuit, and a power supply module; the system software design includes an automatic alarm and cooling module design, a temperature and humidity detection module design, a smoke concentration detection module design, a buzzer alarm module design, a motor drive module design, a pyroelectric infrared detection energy-saving module design, a remote control module design, a stepper motor drive module design, a WIFI communication module design, a host computer design, and an OLED display module design.

The system hardware design:

Single chip microcomputer circuit: As the core control unit of the system, it is responsible for processing data from various sensors and executing control instructions;

Smoke concentration collection circuit: equipped with high-precision smoke sensor to monitor the environmental smoke concentration in real time;

Buzzer alarm circuit: When abnormal data is detected, such as excessive smoke concentration, the alarm is automatically triggered;

Temperature and humidity acquisition circuit: Use temperature and humidity sensors to monitor ambient temperature and humidity in real time;

OLED display circuit: equipped with high-definition OLED display screen to display system status, smoke concentration, temperature, humidity and other data;

Motor drive circuit: drives air conditioners, lighting and other equipment in the park to achieve automatic control;

Stepper motor drive circuit: used to drive the stepper motor to achieve precise mechanical motion control;

Pyroelectric infrared sensor circuit: used to detect human activities, achieve energy-saving control and safety monitoring;

WIFI communication circuit: realize remote transmission of data and reception of control instructions through WIFI network;

Power module: provides stable power supply to ensure the normal operation of the system;

The system software design:

Automatic alarm and cooling module design: when the ambient temperature is too high, it will automatically trigger an alarm and start cooling measures;

Design of temperature and humidity detection module: real-time monitoring of ambient temperature and humidity, and feeding back data to the control system;

Design of smoke concentration detection module: real-time monitoring of environmental smoke concentration, and triggering an alarm immediately if an abnormality is found;

Buzzer alarm module design: when abnormal data is detected, the buzzer alarm is automatically triggered;

Motor drive module design: according to the control instructions, the motor is driven to operate to achieve automatic control; pyroelectric infrared detection energy-saving module design: according to human activities, the lighting, air conditioning and other equipment are intelligently controlled to achieve energy-saving control;

The remote control module is designed to remotely control various facilities in the smart park through the Internet;

Stepper motor drive module design: according to the control instructions, drive the stepper motor to operate and achieve precise control;

WIFI communication module design: through the WIFI network, realize efficient data transmission and control command reception;

Host computer design: Through the host computer software, various facilities and environmental data of the smart park can be remotely monitored;

OLED display module design displays various facilities and environmental data of the smart park in real time through the OLED display

The working steps of the smart park IoT intelligent perception and control system are as follows:

S1. After the system is started, each sensor starts collecting data and transmits it to the control system through the single-chip microcomputer circuit;

S2, the control system performs real-time monitoring and analysis based on the received data;

S3. If abnormal data is found, the system will immediately activate the alarm module and sound an alarm through the buzzer;

S4. At the same time, the system will automatically adjust the operating status of related equipment to reduce the impact of abnormal data;

S5. If manual intervention is required, users can remotely control it through the host computer or mobile phone APP;

S6. The system will also transmit abnormal data and equipment operation status information to the cloud platform in real time, making it convenient for users to conduct remote monitoring and management;

S7. During daily operation, the system will automatically optimize control based on environmental data to achieve energy saving and a comfortable campus environment.

Preferably, the smoke concentration collection circuit uses the MQ-2 smoke sensor module, which adopts ion smoke sensing technology. When there is no smoke, the voltage of QM-N10 is normal, that is, the current flows from the positive electrode to the negative electrode. When smoke is sensed, the voltage is destroyed, and a signal will be sent to inform the alarm module.

Preferably, in the system software design, after the system is initialized, the temperature and humidity sensor and the smoke sensor are in operation, real-time environmental information is collected and then transmitted to the OLED LCD screen for display and uploaded to the host computer through AT commands connected to Alibaba Cloud. The host computer can also send instructions to operate the single-chip microcomputer to control classroom facilities and equipment, such as switching lights, curtains, fans, etc. At the same time, the collected smoke concentration and temperature information can be used to determine whether it is too high, thereby determining whether the alarm and fan respond. Pyroelectric infrared detection performs corresponding operations based on the detection results.

Preferably, the automatic alarm and cooling module is composed of a temperature and humidity detection module, a smoke concentration detection module, a buzzer alarm module, and a motor drive module, mainly with a temperature and humidity collection and smoke concentration module as the core, supplemented by corresponding subsequent operation modules. The functions of each module are as follows:

Temperature and humidity sensor module: detects the temperature and humidity of the surrounding environment and transmits the information to the microcontroller for processing;

Smoke sensor module: detects combustible gases in the surrounding environment and uploads smoke concentration data changes in real time;

Buzzer alarm module: When the smoke concentration detected by the smoke sensor exceeds the calibration value, it will automatically respond to the alarm;

Motor drive module: When the temperature sensor detects that the temperature is too high, it automatically turns on the fan to cool it down.

Preferably, the temperature and humidity detection program flow is as follows:

S101, first initialize the GPIO port, configure the clock, define the GPIOA_0 pin macro as DHT11, configure the output mode as push-pull output mode, and the GPIO output rate as 50MHZ;

S102, then read the temperature and humidity detection values, and refer to the bit-by-bit data reading function to define the byte-by-byte reading function, and then the byte-by-byte reading function can be used to directly read the data;

S103, then store the data read by the byte reading function into an array buf[]. Since DHT11 collects 16-bit data, it is necessary to piece together two 8-bit data to form the temperature value and humidity value respectively;

S104. Finally, the composed 16-bit data is divided by 256 to obtain the actual temperature and humidity values; finally, the reading function is declared and the structure is initialized.

Preferably, the workflow of the system software design module is as follows:

S201, system initialization: executed when the system starts, including initializing hardware, loading preset parameters, and starting timers.

S202, data collection and processing: collect data through modules such as smoke concentration collection circuit, temperature and humidity collection circuit, pyroelectric infrared sensor circuit, etc., process and analyze the collected data, and calculate corresponding control instructions;

S203, control instruction output: according to the control instruction, the start, stop, direction and speed of the motor are controlled through the motor drive circuit, stepper motor drive circuit and other modules to achieve self-balancing control of the system.

S204, alarm and prompt: when an abnormal situation is detected, an alarm sound is emitted through the buzzer alarm circuit, and corresponding alarm information is displayed through the OLED display circuit;

S205, data storage and transmission: the collected data is stored in the memory, and the data is transmitted to the remote monitoring center or cloud platform through the WIFI communication circuit for data analysis and remote control.

S206, parameter adjustment and optimization: according to actual application requirements, the system parameters can be adjusted and optimized through the software interface or other methods to achieve better control effects;

S207, abnormality handling and protection: detect abnormal situations, such as sensor failure, communication interruption, and take corresponding handling measures.

Compared with the prior art, the present invention provides a smart park IoT intelligent perception and control system, which has the following beneficial effects:

1. This smart campus IoT intelligent perception and control system uses DHT11 as a sensor for collecting temperature and humidity. Although its accuracy is slightly lower than that of DHT22, it is more than enough for daily use and its price is half as low. Although the pyroelectric infrared sensor has low sensitivity and a certain delay, its low price and its suitability for classroom detection of students make it a good choice. The WIFI module is used to realize the wireless communication function, which is more suitable for college classrooms where campus networks are arranged throughout the school. It also has low material costs and does not require traffic for continuous operation. Then the motor module and stepper motor module are used to drive the fan and curtain movement. Not only does it have few pins and is easy to operate, but it is also low-cost, fully functional, and has strong practicality. This product realizes automatic control of lights and fans, and can be remotely controlled, achieving the goal of energy saving and emission reduction and facilitating management and control by administrators.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an overall flow chart of the software of the present invention;

FIG2 is a flow chart of the automatic alarm and temperature reduction program of the present invention;

FIG3 is a flow chart of a temperature and humidity detection program of the present invention;

FIG4 is a flow chart of a smoke concentration detection program of the present invention;

FIG5 is a flowchart of a buzzer alarm program of the present invention;

FIG6 is a flow chart of a motor driving program of the present invention;

FIG7 is a flow chart of the pyroelectric infrared detection program of the present invention;

FIG8 is a flowchart of the remote control module program of the present invention;

FIG9 is a flow chart of a stepper motor driver program of the present invention;

FIG10 is a flow chart of the WIFI communication program of the present invention;

FIG. 11 is a flow chart of the OLED display program of the present invention.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figure 1-11, a smart park Internet of Things intelligent perception and control system, including system hardware design and system software design, the system hardware design includes a single-chip microcomputer circuit, a smoke concentration acquisition circuit, a buzzer alarm circuit, a temperature and humidity acquisition circuit, an OLED display circuit, a motor drive circuit, a stepper motor drive circuit, a pyroelectric infrared sensor circuit, a WIFI communication circuit, and a power supply module; the system software design includes an automatic alarm and cooling module design, a temperature and humidity detection module design, a smoke concentration detection module design, a buzzer alarm module design, a motor drive module design, a pyroelectric infrared detection energy-saving module design, a remote control module design, a stepper motor drive module design, a WIFI communication module design, a host computer design, and an OLED display module design.

The system hardware design:

Single chip microcomputer circuit: As the core control unit of the system, it is responsible for processing data from various sensors and executing control instructions;

Smoke concentration collection circuit: equipped with high-precision smoke sensor to monitor the environmental smoke concentration in real time;

Buzzer alarm circuit: When abnormal data is detected, such as excessive smoke concentration, the alarm is automatically triggered;

Temperature and humidity acquisition circuit: Use temperature and humidity sensors to monitor ambient temperature and humidity in real time;

OLED display circuit: equipped with high-definition OLED display screen to display system status, smoke concentration, temperature, humidity and other data;

Motor drive circuit: drives air conditioners, lighting and other equipment in the park to achieve automatic control;

Stepper motor drive circuit: used to drive the stepper motor to achieve precise mechanical motion control;

Pyroelectric infrared sensor circuit: used to detect human activities, achieve energy-saving control and safety monitoring;

WIFI communication circuit: realize remote transmission of data and reception of control instructions through WIFI network;

Power module: provides stable power supply to ensure the normal operation of the system;

The system software design:

Automatic alarm and cooling module design: when the ambient temperature is too high, it will automatically trigger an alarm and start cooling measures;

Design of temperature and humidity detection module: real-time monitoring of ambient temperature and humidity, and feeding back data to the control system; design of smoke concentration detection module: real-time monitoring of ambient smoke concentration, and triggering an alarm immediately if an abnormality is found;

Buzzer alarm module design: when abnormal data is detected, the buzzer alarm is automatically triggered;

Motor drive module design: according to the control instructions, the motor is driven to operate to achieve automatic control; pyroelectric infrared detection energy-saving module design: according to human activities, the lighting, air conditioning and other equipment are intelligently controlled to achieve energy-saving control;

The remote control module is designed to remotely control various facilities in the smart park through the Internet;

Stepper motor drive module design: according to the control instructions, drive the stepper motor to operate and achieve precise control;

WIFI communication module design: through the WIFI network, realize efficient data transmission and control command reception;

Host computer design: Through the host computer software, various facilities and environmental data of the smart park can be remotely monitored;

OLED display module design displays various facilities and environmental data of the smart park in real time through the OLED display

The working steps of the smart park IoT intelligent perception and control system are as follows:

S1. After the system is started, each sensor starts collecting data and transmits it to the control system through the single-chip microcomputer circuit;

S2, the control system performs real-time monitoring and analysis based on the received data;

S3. If abnormal data is found, the system will immediately activate the alarm module and sound an alarm through the buzzer;

S4. At the same time, the system will automatically adjust the operating status of related equipment to reduce the impact of abnormal data;

S5. If manual intervention is required, users can remotely control it through the host computer or mobile phone APP;

S6. The system will also transmit abnormal data and equipment operation status information to the cloud platform in real time, making it convenient for users to conduct remote monitoring and management;

S7. During daily operation, the system will automatically optimize control based on environmental data to achieve energy saving and a comfortable campus environment.

Furthermore, the smoke concentration collection circuit uses the MQ-2 smoke sensor module, which adopts ion smoke sensing technology. When there is no smoke, the voltage of QM-N10 is normal, that is, the current flows from the positive pole to the negative pole. When smoke is sensed, the voltage is destroyed, and a signal will be sent to inform the alarm module.

Furthermore, in the system software design, after the system is initialized, the temperature and humidity sensor and the smoke sensor are in operation, collecting environmental information in real time and then transmitting the information to the OLED LCD screen for display and uploading it to the host computer through AT commands connected to Alibaba Cloud. The host computer can also send commands to operate the microcontroller to control classroom facilities and equipment, such as switching lights, curtains, fans, etc. At the same time, the collected smoke concentration and temperature information can be used to determine whether it is too high, thereby determining whether the alarm and fan respond. The pyroelectric infrared detector determines the detection results to perform corresponding operations.

Furthermore, the automatic alarm and cooling module is composed of a temperature and humidity detection module, a smoke concentration detection module, a buzzer alarm module, and a motor drive module, mainly with the temperature and humidity collection and smoke concentration module as the core, supplemented by corresponding subsequent operation modules. The functions of each module are as follows:

Temperature and humidity sensor module: detects the temperature and humidity of the surrounding environment and transmits the information to the microcontroller for processing;

Smoke sensor module: detects combustible gases in the surrounding environment and uploads smoke concentration data changes in real time;

Buzzer alarm module: When the smoke concentration detected by the smoke sensor exceeds the calibration value, it will automatically respond to the alarm;

Motor drive module: When the temperature sensor detects that the temperature is too high, it automatically turns on the fan to cool it down.

Furthermore, the temperature and humidity detection program flow is as follows:

S101, first initialize the GPIO port, configure the clock, define the GPIOA_0 pin macro as DHT11, configure the output mode as push-pull output mode, and the GPIO output rate as 50MHZ;

S102, then read the temperature and humidity detection values, and refer to the bit-by-bit data reading function to define the byte-by-byte reading function, and then the byte-by-byte reading function can be used to directly read the data;

S103, then store the data read by the byte reading function into an array buf[]. Since DHT11 collects 16-bit data, it is necessary to piece together two 8-bit data to form the temperature value and humidity value respectively;

S104. Finally, the composed 16-bit data is divided by 256 to obtain the actual temperature and humidity values; finally, the reading function is declared and the structure is initialized.

Furthermore, the workflow of the system software design module is as follows:

S201, system initialization: executed when the system starts, including initializing hardware, loading preset parameters, and starting timers.

S202, data collection and processing: collect data through modules such as smoke concentration collection circuit, temperature and humidity collection circuit, pyroelectric infrared sensor circuit, etc., process and analyze the collected data, and calculate corresponding control instructions;

S203, control instruction output: according to the control instruction, the start, stop, direction and speed of the motor are controlled through the motor drive circuit, stepper motor drive circuit and other modules to achieve self-balancing control of the system.

S204, alarm and prompt: when an abnormal situation is detected, an alarm sound is emitted through the buzzer alarm circuit, and corresponding alarm information is displayed through the OLED display circuit;

S205, data storage and transmission: the collected data is stored in the memory, and the data is transmitted to the remote monitoring center or cloud platform through the WIFI communication circuit for data analysis and remote control.

S206, parameter adjustment and optimization: according to actual application requirements, the system parameters can be adjusted and optimized through the software interface or other methods to achieve better control effects;

S207, abnormality handling and protection: detect abnormal situations, such as sensor failure, communication interruption, and take corresponding handling measures.

working principle:

The system is mainly composed of temperature and humidity sensor module, smoke sensor module, motor drive module, stepper motor drive module, OLED display module, pyroelectric infrared sensor module, buzzer alarm module, WIFI module and power module. The system can collect temperature, humidity and smoke concentration in the classroom in real time, and display real-time perception data through OLED. When the temperature is too high, the DC motor will automatically turn on the fan, and it can automatically respond to the buzzer alarm when a fire occurs. At the same time, pyroelectric sensing of human body infrared is used to automatically turn on the lights when someone enters the classroom, and automatically turn off the classroom facilities when no one is in the classroom. The host computer is designed on the Alibaba Cloud platform, and the WIFI module is used to connect to the Alibaba Cloud server, interact with the host computer, and display the temperature, humidity and smoke concentration conversion values collected by the sensor on the administrator's mobile phone. The administrator can remotely control the lighting, fans and curtains controlled by stepper motors in the classroom through the mobile phone. This system is conducive to the intelligent management of the classroom and achieves the purpose of energy saving.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. Intelligent sensing and control system of intelligent garden thing networking, its characterized in that: the system comprises a system hardware design and a system software design, wherein the system hardware design comprises a singlechip circuit, a smoke concentration acquisition circuit, a buzzer alarm circuit, a temperature and humidity acquisition circuit, an OLED display circuit, a motor driving circuit, a stepping motor driving circuit, a pyroelectric infrared sensor circuit, a WIFI communication circuit and a power module; the system software design comprises an automatic alarm cooling module design, a temperature and humidity detection module design, a smoke concentration detection module design, a buzzer alarm module design, a motor driving module design, a pyroelectric infrared detection energy-saving module design, a remote control module design, a stepping motor driving module design, a WIFI communication module design, an upper computer design and an OLED display module design;

the system hardware design comprises the following steps:

the singlechip circuit comprises: as a core control unit of the system, the system is responsible for processing data from each sensor and executing control instructions;

smoke concentration acquisition circuit: the high-precision smoke sensor is equipped for monitoring the concentration of the environmental smoke in real time;

buzzer alarm circuit: when abnormal data such as excessive smoke concentration is detected, an alarm is automatically triggered;

the temperature and humidity acquisition circuit comprises: a temperature and humidity sensor is adopted to monitor the ambient temperature and humidity in real time;

OLED display circuit: the high-definition OLED display screen is provided and used for displaying data such as system state, smoke concentration, temperature, humidity and the like;

a motor driving circuit: driving equipment such as air conditioners, illumination and the like in the park to realize automatic control;

step motor driving circuit: the device is used for driving a stepping motor to realize accurate mechanical motion control;

pyroelectric infrared sensor circuit: the device is used for detecting human body activities and realizing energy-saving control and safety monitoring;

WIFI communication circuit: the remote transmission of data and the receiving of control instructions are realized through a WIFI network;

and a power supply module: providing stable power supply to ensure the normal operation of the system;

the system software design:

automatic alarm cooling module design: when the ambient temperature is too high, automatically triggering an alarm and starting a cooling measure;

temperature and humidity detection module design: monitoring the temperature and the humidity of the environment in real time, and feeding back data to a control system;

and (3) designing a smoke concentration detection module: monitoring the concentration of environmental smoke in real time, and immediately triggering an alarm once abnormality is found;

the buzzer alarm module is designed: when abnormal data is detected, automatically triggering a buzzer to alarm;

motor drive module design: according to the control instruction, driving the motor to operate, and realizing automatic control;

the design of the pyroelectric infrared detection energy-saving module comprises the following steps: according to the activity condition of human body, the switch of equipment such as lighting, air conditioner is intelligently controlled, so as to realize energy-saving control;

the remote control module is used for remotely controlling various facilities of the intelligent park through the Internet;

step motor driving module design: according to the control instruction, driving the stepping motor to operate, so as to realize accurate control;

WIFI communication module design: through the WIFI network, efficient transmission of data and reception of control instructions are realized;

the upper computer design: by means of the upper computer software, various facilities and environmental data of the intelligent park can be monitored remotely;

OLED display module designs each item facility and environmental data that shows smart park in real time through OLED display screen

The intelligent sensing and control system of the intelligent park Internet of things comprises the following working steps:

s1, after the system is started, each sensor starts data acquisition and transmits the data to a control system through a singlechip;

s2, the control system monitors and analyzes in real time according to the received data;

s3, if abnormal data are found, the system immediately starts an alarm module and gives an alarm through a buzzer;

s4, simultaneously, the system automatically adjusts the running state of the related equipment so as to reduce the influence of abnormal data;

s5, if manual intervention is needed, a user can remotely control through an upper computer or a mobile phone APP;

s6, the system also transmits the abnormal data and the equipment running state information to the cloud platform in real time, so that a user can conveniently monitor and manage remotely;

and S7, in daily operation, the system automatically performs optimal control according to the environment data so as to realize energy saving and comfortable park environment.

2. The intelligent sensing and control system of the internet of things for the intelligent park according to claim 1, wherein: the smoke concentration acquisition circuit adopts an MQ-2 smoke sensor module, adopts an ionic smoke sensing technology, and when no smoke exists, the voltage of QM-N10 is normal, namely current flows from the positive electrode to the negative electrode, and when smoke is sensed, the voltage is destroyed, and a signal is sent to inform the alarm module.

3. The intelligent sensing and control system of the internet of things for the intelligent park according to claim 1, wherein: after the system is initialized in the system software design, the temperature and humidity sensor and the smoke sensor are in an operating state, environmental information is acquired in real time and then transmitted to an OLED liquid crystal screen for display, and the OLED liquid crystal screen is connected with an Arian cloud for uploading to an upper computer through an AT instruction, and the upper computer can also send an instruction to operate a single-chip microcomputer to control classroom facility equipment.

4. The intelligent sensing and control system of the internet of things for the intelligent park according to claim 1, wherein: the automatic alarm cooling module is composed of a temperature and humidity detection module, a smoke concentration detection module, a buzzer alarm module and a motor driving module, mainly takes a module for collecting the temperature and humidity and the smoke concentration as a core, and is assisted by a corresponding follow-up operation module, and the functions of each module are as follows:

temperature and humidity sensor module: detecting the temperature and humidity of the surrounding environment, and transmitting information to a singlechip for processing;

smoke sensor module: detecting combustible gas in the surrounding environment, and uploading smoke concentration data change in real time;

buzzer alarm module: when the smoke concentration detected by the smoke sensor exceeds a calibration value, automatically responding to an alarm;

and a motor driving module: when the temperature sensor detects that the temperature is too high, the fan is automatically started to cool.

5. The intelligent sensing and control system of the internet of things for the intelligent park according to claim 1, wherein: the temperature and humidity detection program flow is as follows:

s101, initializing a GPIO port, configuring a clock, defining a GPIO_0 pin macro as DHT11, configuring an output mode as a push-pull output mode, and enabling the GPIO output rate to be 50MHz;

s102, then reading a temperature and humidity detection value, defining a byte-wise read function by referring to the byte-wise read data function, and then directly reading data by using the byte-wise read function;

s103, storing the data read according to the byte reading function into an array buf, wherein the DHT11 acquires 16-bit data, so that two 8-bit data are required to be spliced and assigned to form a temperature value and a humidity value respectively;

s104, dividing the 16-bit data by 256 to obtain actual temperature and humidity values; finally, the read function is declared and the structure is initialized.

6. The intelligent sensing and control system of the internet of things for the intelligent park according to claim 1, wherein: the workflow of the system software design module is as follows:

s201, initializing a system: the method is executed when the system is started, and comprises the steps of initializing hardware, loading preset parameters and starting a timer.

S202, data acquisition and processing: the method comprises the steps of collecting data through a smoke concentration collecting circuit, a temperature and humidity collecting circuit, a pyroelectric infrared sensor circuit and other modules, processing and analyzing the collected data, and calculating corresponding control instructions;

s203, outputting a control instruction: according to the control instruction, the starting, stopping, direction, rotating speed and the like of the motor are controlled through the motor driving circuit, the stepping motor driving circuit and other modules, so that the self-balancing control of the system is realized.

S204, alarming and prompting: when an abnormal condition is detected, an alarm sound is sent out through a buzzer alarm circuit, and corresponding alarm information is displayed through an OLED display circuit;

s205, data storage and transmission: and storing the acquired data in a memory, and transmitting the data to a remote monitoring center or a cloud platform through a WIFI communication circuit so as to perform data analysis and remote control.

S206, parameter adjustment and optimization: according to the actual application requirements, system parameters can be adjusted and optimized through a software interface or other modes so as to achieve a better control effect;

s207, exception handling and protection: abnormal conditions such as sensor faults and communication interruption are detected, and corresponding processing measures are adopted.