CN107861396B

CN107861396B - Intelligent bedroom system based on Internet of things

Info

Publication number: CN107861396B
Application number: CN201711359654.3A
Authority: CN
Inventors: 胡瑛; 王树材
Original assignee: Hunan Institute of Engineering
Current assignee: Hunan Institute of Engineering
Priority date: 2017-12-17
Filing date: 2017-12-17
Publication date: 2023-12-15
Anticipated expiration: 2037-12-17
Also published as: CN107861396A

Abstract

The invention discloses an intelligent bedroom system based on the Internet of things, which comprises an MCU, a power module, a sensor module, an executing mechanism and a communication module, wherein the MCU is connected with the power module; the power supply module is used for supplying power to the MCU; the power module, the sensor module, the actuating mechanism and the communication module are all connected with the MCU; the sensor module comprises a temperature and humidity sensor, a rainfall sensor, an air quality sensor, an illumination sensor and a current transformer; the actuating mechanism comprises an electric clothes hanger, a ventilation fan and a relay for controlling the power-off and power-on of electric equipment; the MCU drives the electric clothes hanger to automatically shrink and stretch through a motor; the ventilation fan is controlled by the MCU; the electric equipment comprises at least one of a water dispenser, an electric cooker and an electromagnetic oven. The intelligent bedroom system based on the Internet of things is rich in function, easy to control, high in safety and reliability and has an anti-theft function.

Description

Intelligent bedroom system based on Internet of things

Technical Field

The invention relates to an intelligent bedroom system based on the Internet of things.

Background

The intelligent home system mainly develops towards the direction of serving the individual families, and can be used as a student home for students, and the bedroom is a place for learning and resting and relaxing, but the structure and the environment of the bedroom are greatly different from those of ordinary individual families, and the bedroom has the problems of narrow space, unsmooth indoor air exchange, difficult optimization of circuit aging, incomplete indoor sealing during door closing and the like. In order to improve the living environment of students and facilitate school management, it is necessary to design an intelligent bedroom system different from a general intelligent home system according to the current situation and the demand of bedrooms.

The intelligent dormitory system is like an all-round manager of a student dormitory, and is always in charge of dormitory without being tired. The student does not need to carry a key at any more in a tedious way when entering the bedroom after finishing the lesson, but can recognize the door through the one-card of the school. The system senses various life data of the bedroom environment through a large number of sensors, such as detecting the temperature and humidity of the bedroom, analyzing the indoor air quality, and comparing with an optimal value, so that the bedroom is ventilated and breathable, has no peculiar smell, and keeps the most comfortable state. Students can feel very agreeable by controlling electric appliances such as indoor lamps and water dispensers through voices when studying or resting in bedrooms, so that the sense of depression brought by the narrow bedroom space is reduced. Every school all requires the student at bedroom safe power consumption, because change bedroom circuit along with the time just becomes ageing, if overload appears the incident very easily, intelligent bedroom system needs monitor the bedroom circuit condition constantly, thereby need in time cut off the power when detecting the bedroom member and use high-power and avoid taking place the accident. Sometimes students are in class, and the problem of clothes airing caused by weather changes can be solved by the intelligent bedroom system, so that the students can be free from worry of the students after the students are in class. In case of safety, the optimal scheme can be adopted in time, for example, a post-fire alarm can be found, and a bedroom member is notified after theft is found, so that the loss is minimized.

Providing such an intelligent, comfortable and safe living environment for students will make the students study and live more confident. For schools, the intelligent bedroom system can help schools to better solve the problems of managing bedrooms, preventing various safety accidents and the like, so that the intelligent bedroom system has great help and significance in the aspects of helping to improve student living environments, school management and the like.

After the first intelligent building in the world is designed and shown in the United states in 1984, countries and regions with developed economy in the world, such as Canada, australia, japan, european Union and the like, begin to explore the intelligent home industry, various intelligent home schemes are provided, so that the intelligent home technology is gradually developed and is greatly improved, the intelligent home technology is paid considerable attention to in China, and intelligent home products gradually enter people to live to serve people.

A person called Derek Low in the united states successfully designed a warm and intelligent bedroom. He carries out interconnect communication with various electrical equipment in the bedroom through the network with mobile device, utilizes acousto-optic sensor, modules such as speech recognition have created this automation bedroom, have reached and have arrived the automatic alarm clock of opening the light and open the (window) curtain of opening, get back to the bedroom and open the light and open the (window) curtain automatically, use infrared remote control and cell-phone APP and speech recognition function to control the effect of electrical apparatus such as electric lamp to naming the bedroom as BRAD, let the people feel bright before the eyes, very happy.

In China, people are actively searching the most effective and reliable design scheme for college students' bedrooms, and a bedroom intelligent access control system is designed by utilizing a microcontroller and an RFID radio frequency module, so that the problem that students can not get away from the bedroom and forget to take keys is solved, and a bedroom safety anti-theft system is designed aiming at the fact that important properties of the bedroom are easy to be stolen, but compared with foreign countries and intelligent households, the bedroom intelligent access control system has single function, is not comprehensive and perfect enough, and has low development speed.

With the increasing national economy level, the traditional school bedroom is eliminated, and it is important to provide a more comfortable and safe living environment for students, so that a new intelligent bedroom system based on the Internet of things is necessary to design.

Disclosure of Invention

The intelligent bedroom system based on the Internet of things is compact in structure, rich in functions and capable of effectively guaranteeing the safety of a bedroom.

The technical proposal of the invention is as follows:

an intelligent bedroom system based on the Internet of things comprises an MCU, a power module, a sensor module, an executing mechanism and a communication module;

The power supply module is used for supplying power to the MCU; the power module, the sensor module, the actuating mechanism and the communication module are all connected with the MCU;

the sensor module comprises a temperature and humidity sensor, a rainfall sensor, an air quality sensor, an illumination sensor and a current transformer;

the actuating mechanism comprises an electric clothes hanger, a ventilation fan and a relay for controlling the power-off and power-on of electric equipment;

the MCU drives the electric clothes hanger to automatically shrink and stretch through a motor; the electric clothes hanger is the prior mature technology;

the ventilation fan is controlled by the MCU;

the electric equipment comprises at least one of a water dispenser, an electric cooker and an electromagnetic oven.

The motor is a stepping motor, and the MCU controls the stepping motor to rotate by sending control pulses.

The sensor module also comprises an infrared sensor, and the MCU is connected with an alarm.

The intelligent bedroom system based on the Internet of things further comprises at least one camera connected with the MCU.

The sensor module further comprises a flame sensor, and the actuating mechanism further comprises a spraying device.

The intelligent bedroom system based on the Internet of things also comprises a standby power supply based on a lithium battery.

The communication module comprises a wired communication module and a wireless communication module; the wired communication module is a WLAN module, the wireless communication module is at least one of a WiFi module, a GPRS (general packet radio service), a 3G (third generation telecommunication), a 4G and a 5G communication module, and the intelligent bedroom system is connected with the server through the communication module; the intelligent bedroom system is in communication connection with the intelligent mobile phone through the communication module.

The intelligent bedroom system based on the Internet of things also comprises an access control device (which is used for controlling the unlocking of the door lock after reading the RFID card) based on the RFID card reader and the electric door lock;

in the power supply module, MP2359 is adopted to output 5V voltage to supply power for system peripherals (sensors and the like); the ASM1117-3.3V voltage stabilizing chip supplies power for the MCU; the input end of the ASM1117-3.3V voltage stabilizing chip is connected with 5V voltage;

the display screen adopts a TFT liquid crystal screen, a driving chip of the display screen is ILI9341, and a touch chip is XPT2046.

The intelligent bedroom system based on the Internet of things also comprises a lighting system controlled by the MCU;

in the rainfall detection circuit, a first fixed end of the sliding rheostat R9 is connected with VCC, and the direct-current power supply voltage is 5V. The second fixed end is grounded; the tap end (sliding end) of the sliding rheostat R9 is connected with the inverting input end of the operational amplifier U2 (LM 393 operational amplifier), the first end of the resistor R3 is connected with the VCC end, and the second end of the resistor R3 is grounded through a raindrop sensor; the second end of the resistor R3 is connected with the non-inverting input end of the operational amplifier U2; the output end of the operational amplifier U2 is connected with the VCC end through a resistor R4; the output of the operational amplifier U2 serves as the output of the comparator, i.e. the output of the rain detection circuit.

The intelligent bedroom system based on the Internet of things also comprises man-machine interaction equipment; the man-machine interaction equipment comprises a display screen and a data/instruction input device; the data/instruction input device is a keyboard or a touch pad.

The MCU adopts an STM32F407 chip.

The automatic control method comprises the following steps:

step 1: detecting a field state by a sensor;

step 2: controlling each executing mechanism through a preset control strategy, a field (of a remote controller) control instruction or a remote (of a mobile phone end) control instruction;

step 3: feeding back the latest state data to the intelligent mobile phone end through the communication module;

there are two control modes:

(1) The method for manually and actively monitoring the field device comprises the steps of remotely controlling the field device by a mobile phone;

(2) The field device automatically controls and feeds back a control result to the mobile phone end;

the specific control method comprises the following steps:

(1) Controlling access control; alarming the entrance guard;

detecting the intrusion of a person, and starting an alarm;

(2) Fire alarm and spray control;

the flame sensor detects a fire point, starts an alarm and starts spraying equipment;

(3) Temperature and humidity control and a humidifier; air-conditioning;

detecting whether the temperature and the humidity are within a preset range or not through a temperature and humidity sensor, dehumidifying and controlling the humidity through a humidifier and an air conditioner, and controlling the temperature through the air conditioner;

(4) Anti-theft control based on infrared detection;

detecting whether the valuables move or not through the infrared sensor, and starting an alarm if the valuables move excessively;

(5) Overload monitoring of electric equipment, and control based on a current transformer and a relay;

detecting working current of electric equipment through a current transformer, and cutting off the power supply of the electric equipment through a relay if the current exceeds a threshold value;

(6) Based on the rainfall sensor, controlling the clothes hanger;

detecting the rainfall through a rainfall sensor, controlling the clothes hanger to shrink if the rainfall is higher than a threshold value, otherwise, controlling the clothes hanger to expand and dry clothes; and controls the closing of the window.

(7) Controlling illumination; controlling light;

the illumination sensor detects illumination, the illumination is higher than a threshold value, the lamp is turned off, and when the illumination is weak, the lamp is turned on, and the lamp brightness is regulated (PWM pulse control brightness).

(8) Air quality detection and ventilation control;

and detecting the air quality through an air quality sensor, and opening the electric window or starting air conditioning ventilation when the air pollution degree is higher than a threshold value.

(9) And (5) video monitoring.

And secondly, the backlight dimming control of the display screen is also included, so that the light intensity of the backlight can be manually adjusted.

The beneficial effects are that:

the intelligent bedroom system based on the Internet of things uses the STM32F407 chip as a main controller, and aims to display bedroom environment data and provide an input channel for automatic control instructions; the RFID technology is used for realizing the automatic identification of the access control card so as to realize the access control function; various sensors are arranged in the bedroom, a strong environment sensing network is organized, so that the system can accurately judge and operate the environment, and the functions of air conditioning, airing and collecting clothes and the like can be realized; in the aspect of bedroom safety, the system can prevent fire and burglary and monitor bedroom current, so that the problem of safety caused by the use of high-power electric appliances by members in the bedroom is effectively prevented; the system can control the electrical appliances of the bedroom by voice and can remotely monitor the environment of the bedroom by using a mobile phone and control the electrical appliances of the bedroom.

The system mainly realizes the following functions:

(1) Entrance guard's function: and the RC522 module is used for reading the magnetic card and inputting or deleting the ID of the access card, so that whether the ID of the access card can be unlocked or not is authorized.

(2) Air conditioning: and detecting the air quality and the temperature and humidity of the bedroom so as to obtain an air quality index, and adjusting the air quality of the bedroom through indoor and outdoor air flow exchange.

(3) And (3) voice recognition: and accurately judging the voice command through a voice recognition technology, and further controlling an electric appliance corresponding to the command.

(4) Fireproof and antitheft: whether fire condition exists in the bedroom is detected by the flame sensor, important articles in the bedroom such as a computer and the like are detected by the infrared light sensor and the ultrasonic sensor and the like, and the bedroom is alarmed once moved by other people.

(5) A notification unit: and transmitting the data or the alarm to a mobile phone control end and receiving a mobile phone control command.

(6) Password part: the use permission is fixed by setting and storing the password.

(7) Overcurrent protection: the maximum threshold of the bedroom circuit is set and the circuit is cut off once the detection circuit exceeds this value.

(8) Automatic airing and collecting clothes: through environmental perception weather condition, driving motor makes forward rotation and dries in the sun and the action of receiving the clothing of reversal.

The system has the functions of entrance guard, automatic air regulation, safety protection, automatic clothes collection and airing, voice control, circuit current limiting protection, mobile phone data display and control and the like. The system uses an STM32F407 chip as a main controller, and intelligently adjusts bedrooms on the basis of an environment sensing network; the entrance guard function adopts an RFID radio frequency technology, and the automatic identification of an entrance guard card is completed through a card reader; the current detection is added to the safe bedroom in the fireproof and anti-theft functions, so that the safety problem caused by high power use of bedroom members is effectively prevented; the system realizes the function of controlling the electrical appliance by voice through the voice recognition module; based on GSM and WIFI communication technology, communication between the control end and the mobile end is completed, and monitoring of the indoor environment of the bedroom and remote control of the electrical appliance are achieved.

The invention can provide an intelligent, safe and comfortable living environment for students based on the high-speed development of the Internet of things technology.

Drawings

FIG. 1 is a general architecture diagram of the system of the present invention;

FIG. 2 is a schematic diagram of a power circuit;

FIG. 3 is a schematic diagram of a display screen circuit;

FIG. 4 is a schematic diagram of an application circuit of a DHT11 digital temperature and humidity sensor;

FIG. 5 is a circuit diagram of an air quality detection circuit;

FIG. 6 is a schematic diagram of a rain detection circuit;

FIG. 7 is a schematic diagram of an illumination detection circuit;

FIG. 8 is a circuit diagram of an RFID module;

FIG. 9 is a schematic diagram of a flame detection circuit;

FIG. 10 is a schematic diagram of a current sensing and relay control circuit for a powered device;

FIG. 11 is a schematic diagram of an anti-theft circuit based on an infrared pair tube sensor;

fig. 12 is a relay circuit diagram;

FIG. 13 is (one of) the schematic diagram of the motor drive circuit;

FIG. 14 is a schematic diagram of a motor driving circuit (II);

fig. 15 is a schematic diagram of a wifi transmission circuit;

FIG. 16 is a schematic diagram of a sprinkler head and fire sensor distribution;

FIG. 17 is a schematic view of a rotary spray device;

FIG. 18 is a schematic view of a sprinkler;

FIG. 19 is a schematic diagram of a display screen backlight adjustment circuit;

FIG. 20 is a schematic of constant current charging;

FIG. 21 is a schematic view of a camera head;

Fig. 22 is a schematic diagram (side view) of the overall structure of the wireless charging system;

fig. 23 is a schematic diagram of the overall structure of the wireless charging system (top view);

FIG. 24 is a schematic view of the cover plate when closed;

FIG. 25 is a schematic view of the cover plate lifted;

description of the reference numerals: 301-partition, 302-fire sensor, 303-spray head.

108-a spray gun; 116-stay cord, 117-spray gun driving motor, 118-rotary platform, 119-driven gear, 120-supporting seat, 121-rotary platform driving motor, 122-first driving gear, 123-spray gun rack.

111-crawler-type travelling mechanisms, 112-supporting platforms and 113-auxiliary water tanks; 114-sub-camera, 115-auxiliary spray gun; 71-sub lens, 72-compound lens, 73-rotating shaft, 74-light reflecting plate, 75-photoelectric transmitting and receiving device, 76-CCD sensor and 77-machine body.

201-a concave part, 202-a bottom layer movable platform, 203-a first motor, 204-a limit switch, 205-a guide rail, 206-a first rack rail, 207-a second driving gear, 208-a code wheel, 209-a travelling wheel, 210-a lifting platform, 211-a second rack rail, 212-a lead, 213-a power plug, 214-a transmitting coil, 215-a scissor lifting mechanism, 216-an upper movable platform, 217-a push rod, 218-a compression-proof frame and 219-a movable cover plate.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings and specific examples:

example 1: as in fig. 1, the overall system design consists of the following six parts:

(1) And the control end uC-GUI interface operation design. And transplanting uC-GUI software at the control end to complete the design of standby, menu and function setting interfaces, so that the system has the capability of displaying and inputting data.

(2) An environmental monitoring subsystem. And arranging a proper sensor environment sensing network at each required position of the bedroom to obtain real-time data of each environmental information in the bedroom, such as temperature, humidity, air quality and the like, wherein the system also uses the data as a judgment basis and an implementation basis of the intelligent linkage system.

(3) And an intelligent access control subsystem. And the RFID technology is adopted, and the access control card is read by a card reader to obtain the authorization information. And when the user swipes the card, the system intelligently recognizes information of the user, automatically opens the access control system to allow access if the user swipes the card, and does not allow access if the user swipes the card to be invalid.

(4) And an intelligent security subsystem. The fire condition of the bedroom is monitored through the flame sensor, whether the valuable articles in the bedroom are moved or not is monitored through the infrared sensor, whether the current in the bedroom circuit exceeds the value is monitored through the current detection circuit, and the alarm information is sent to the mobile phone number appointed by the system through the GSM communication module once the abnormality is found.

(5) And (5) an intelligent linkage subsystem. After the main control end is provided with rules or conditions for automatic control, the control of bedroom electric lamps, water dispensers, exhaust fans, clothes airing motors and the like is realized by means of environment monitoring data. If the system receives a voice command, the system automatically performs operation through voice recognition, for example, the lamp is automatically turned on when the voice command of turning on the lamp is received, and the lamp is automatically turned off when the voice command of turning off the lamp is received.

(6) And a data transmission subsystem. And transmitting real-time data of the bedroom environment to the mobile client through the WIFI through a custom data transmission protocol, and simultaneously receiving a control instruction sent to the bedroom main control system by the mobile phone APP software.

The system combines the living characteristics of students and provides an intelligent bedroom system scheme with the functions of entrance guard, air automatic regulation, safety protection, automatic clothes collection and airing, voice control, circuit current limiting protection, mobile phone data display and control and the like for the students through the design of six subsystem modules. Compared with the traditional intelligent bedroom scheme, the intelligent bedroom system has the characteristics of more comprehensive functions, more convenient control and more smooth operation, and accords with the intelligent, safe and comfortable concepts of the intelligent bedroom.

The main controller in the hardware system adopts Cortex-based technology produced by ST company ^TM The operation rate of the STM32F407ZGT6 chip of M4 can reach 168MHz at the highest, and the chip has 1M FLASH and can also carry out floating point operation.

In addition, as in FIGS. 2-15, the following is described for a particular peripheral circuit:

(1) A power supply circuit:

as shown in fig. 2, the power supply circuit converts the input voltage into 5V voltage through MP2359 to supply power to the system peripheral, and supplies power to the main control chip through ASM1117-3.3V voltage stabilizing chip. The diodes D3, D4 and D5 can prevent the reverse connection burning system by utilizing the unidirectional conduction characteristic; the inductor L1 and the capacitors C22 and C23 in the circuit are mainly used for filtering, so that the stability of the power supply output is ensured.

(2) Display circuit

The display screen circuit is as shown in fig. 3; the TFT LCD display driver is ILI9341, and the touch chip is XPT2046. The backplane size was 5.1 x 8.3cm, showing a resolution of 240x320. The liquid crystal display screen is used for providing a man-machine interaction interface and a control interface.

(3) Temperature and humidity detection circuit

As shown in FIG. 4, the DHT11 is a sensor which has high response speed, strong noise resistance and high cost performance and can be communicated with a singlechip by adopting a serial single bus to measure temperature and humidity.

Working principle: the DHT11 digital temperature and humidity sensor has the function of calibrating temperature and humidity digital signal output, and the inside of the DHT11 digital temperature and humidity sensor comprises a resistance humidity sensing element and an NTC temperature measuring element, so that the temperature and the humidity can be measured simultaneously. Since serial single bus communication is employed with the host controller, the PC4 pin of STM32F407 and the DHT11 data out pin connection are used in the present system. The DHT11 sensor mainly collects temperature and humidity data for the system.

(4) Air quality detection circuit

The MQ-135 is a sensor applied to measuring air quality, and has the advantages of wide detection range, higher response and sensitivity, stable operation and the like.

Working principle: as shown in fig. 5, the characteristic of low conductivity of SnO2 in the air is used as the gas-sensitive material of the sensor, if the gas pollution degree is increased, the conductivity of the sensor is increased, so that the signal output corresponding to the sensor can be obtained, and the system can obtain the pollution degree of the air only by collecting and comparing the signal output. The sensitivity of the circuit is regulated by a slide rheostat VR1, the gas information is collected by an MQ-135 sensor and then converted into a voltage signal to be output, and the voltage signal output by the sensor is shaped by an LM393 voltage comparator and then the level signal of the whole circuit is output. The serial single bus is used for communication, and the PF13 pin of STM32F407 and the air quality sensor data output pin are used for connection in the system. MQ-135 primarily collects air quality data for the system

The output end of the MQ-135 is connected with the inverting input end of the operational amplifier LM393, the VCC end is grounded through the variable resistor R49, the leading-out end (voltage dividing end) of the variable resistor R49 is connected with the non-inverting input end of the operational amplifier LM393, the operational amplifier LM393 works in a comparator mode, the output end of the operational amplifier LM393 is the output end of the air quality detection circuit, the output end is connected with the VCC end through the diode LED10 and the pull-up resistor R52, and the LED10 is lighted when the high level is output. This indicates good air quality.

(5) Rainfall detection circuit

As shown in FIG. 6, the raindrop sensor (or rain sensor) collecting board is made of high-quality FR-04 double-sided material and covered with nickel plating, so that the collecting board has excellent performances of oxidation resistance, good conductivity and the like.

Working principle: the area of the acquisition board is 5.0 cm by 4.0cm, information about whether the environment rains or not can be acquired well, signal output is regular through the LM393 voltage comparator, and the potentiometer can adjust the comparison voltage, so that the threshold value of adjustment output is achieved. When the environment is not rainy, the output is high level, and when the collecting plate receives raindrops to conduct, the output is low level. When rain stops, the raindrops on the collecting plate are dried in the sun and then are restored to be output to be high level. The sensitivity of the circuit can be adjusted by the slide rheostat VR1, the raindrop information is collected by the raindrop sensor and then converted into voltage signals to be output, and the voltage signals output by the sensor are shaped by the LM393 voltage comparator and then output the level signals of the whole circuit. The circuit also has the functions of power supply indication and switch indication, and the current is limited by a resistor of 1K in the circuit so as to prevent the current from being overlarge. The PD3 pin of STM32F407 is used in the present system to connect with the data output pin of the rain sensor. The module has the main function of providing outdoor rain information detection for the system.

The first fixed end of the sliding rheostat R9 is connected with VCC (direct-current power supply voltage, 5V), and the second fixed end is connected with the ground; the tap end (sliding end) of the sliding rheostat R9 is connected with the inverting input end of the operational amplifier U2 (LM 393 operational amplifier), the first end of the resistor R3 is connected with the VCC end, and the second end of the resistor R3 is grounded through a raindrop sensor; the second end of the resistor R3 is connected with the non-inverting input end of the operational amplifier U2; the output end of the operational amplifier U2 is connected with the VCC end through a pull-up resistor R4; the output of the operational amplifier U2 serves as the output of the comparator, i.e. the output of the rain detection circuit.

The output end of the rainfall detection circuit is connected with the VCC end through a resistor R10, and the diode LED4 shows that the rainfall exceeds the standard when being on.

(6) Illumination detection circuit

A circuit diagram using a photoresistor as a photosensor is shown in fig. 7.

The photosensitive sensor is essentially a resistor with a resistance value changing along with the change of light, and the module consists of a photosensitive resistor, a voltage comparator and a potentiometer.

Working principle: the sensitivity of the whole module to light detection can be adjusted through a potentiometer, when the brightness of the ambient light does not reach a set threshold value, the DO end outputs a high level, and when the brightness of the ambient light exceeds the set threshold value, the DO end outputs a low level; the intelligent light source has the sensitivity adjusting function, the sensitivity of the adjusting circuit is formed by the slide rheostat VR1, the light information is collected by the photoresistor and then converted into a voltage signal to be output, and the voltage signal output by the sensor is shaped by the LM393 voltage comparator and then the level signal of the whole circuit is output. The circuit also has the functions of power supply indication and switch indication, and the current is limited by a resistor of 1K in the circuit so as to prevent the current from being overlarge. The system uses the PC11 pin of STM32F407 to be connected with the data output pin of the photosensitive sensor, the PC11 pin is an ADC acquisition pin, and the signal voltage is acquired and analyzed in the STM32, so that the light intensity is obtained. The module mainly functions to detect the change of the ambient light and collect the ambient light to the system in time.

The circuit connection mode is as follows:

the first fixed end of the sliding rheostat R6 is connected with VCC (direct-current power supply voltage, 5V), and the second fixed end is connected with the ground; the tap end (sliding end) of the sliding rheostat R6 is connected with the inverting input end of the operational amplifier U1 (LM 393 operational amplifier), the first end of the resistor R1 is connected with the VCC end, and the second end of the resistor R1 is grounded through a photoresistor; the second end of the resistor R1 is connected with the non-inverting input end of the operational amplifier U1; the output end of the operational amplifier U1 is connected with the VCC end through a resistor R2; the output of the operational amplifier U1 serves as the output of the comparator, i.e. the output of the illumination detection circuit.

The output end of the illumination detection circuit is also connected with the diode LED2 through the resistor R7 to the VCC end, and the diode LED2 indicates that the illumination exceeds the standard when being on.

(7) RFID module circuit diagram

As shown in fig. 8, the rc522 is a low-voltage low-cost small-volume 13.56MHz non-contact high-integration read-write card proposed by NXP corporation, and is currently widely applied to product development of portable handheld devices of intelligent meters and the like.

Working principle: RC522 integrates all passive contactless modes of communication at 13.56MHz, enabling the transmission of information from a read-write antenna and ISO14443A/MIFARE cards and transponders using advanced modem technology. The transponder signal of ISO14443A is processed by the demodulation decoding circuit, and also the frame error, CRYPTO1 encryption algorithm can be processed. The bi-directional data communication rate reaches 424kbit/s. RC522 employs serial communication, supporting SPI, I2C, UART.

In the present system, the PB4 pin and MISO line connection, the PB5 pin and MOSI line connection, the PB3 pin and SCK line connection, and the PG0 pin and SDA line connection of STM32F407 are used. The RC522 chip is driven by the simulation SPI protocol to realize the radio frequency communication technology, and the read-write work of the IEC14443A protocol card is completed on the basis. The main function of the module is to enable the system to identify the access control card through the RC522 chip, thereby completing the access control function.

(8) Flame detection circuit

Flame sensors are sensors used to search for a source of fire and are particularly sensitive to the light generated by the flame.

Working principle: the heat radiation generated by the flame has the characteristics of discrete light radiation and continuous light radiation, so that the flame can be distinguished by detecting the intensity of near infrared wavelength of 1-2 mu m of the flame temperature. The detection distance of the sensor is increased along with the increase of the intensity of flame, the detection angle is about 60 degrees, and the sensitivity can be adjusted by adjusting the comparison voltage. The sensitivity of the circuit is regulated by the slide rheostat VR1, flame information is collected by the infrared receiving tube and then converted into voltage signals to be output, and the voltage signals output by the sensor are shaped by the LM393 voltage comparator and then output level signals of the whole circuit. The PD6 pin of STM32F407 is used in the present system to connect with the data output pin of the flame sensor. The function of the flame sensor circuit is to detect whether a fire condition exists in the bedroom for the system, and the circuit connection is as shown in fig. 9.

(9) Current detection and relay control circuit of electric equipment

The intelligent bedroom system can well prevent the bedroom safety problem by detecting the electricity consumption of the bedroom, the working voltage of a used current detection circuit is 5V, and the load power can be connected with 220V/40A equipment.

Working principle: the current transformer generates mutual inductance current through inserting a bedroom alternating current wire into the current transformer (or coil), the larger the bedroom electric power is, the larger the mutual inductance current is, the smaller the bedroom electric power is, the smaller the mutual inductance current is, therefore, a signal waveform can be output by using the voltage comparator, and the main controller can acquire current information of the bedroom through AD acquisition, so that the detection effect is achieved. In the circuit design, alternating current is converted into direct current through four rectifier diodes, power supply filtering is performed by using C3, a current loop is formed through R2, the circuit can obtain an output signal only by measuring the voltage at two ends of R2, and the voltage of the output signal is compared with a reference voltage through an MCP602 voltage comparator so as to control a relay and the reference voltage

The relay plays a role in overcurrent power-off protection, and two types of output signals are output, namely an analog quantity, DOUT and an TTL high-low level and AOUT. The main function is to detect bedroom current for the system. The detailed circuit design is shown in fig. 10 below.

U4 is a voltage follower.

Description of the circuit:

as shown in fig. 10, a current transformer L2 is connected in parallel with a resistor R17, and an output signal of the current transformer passes through a bridge rectifier; the first end of the direct current side of the bridge rectifier is a signal end, and the second end is grounded; the signal end is grounded through a resistor R16 and a resistor R14; the connection point of the resistor R16 and the resistor R14 is connected with the non-inverting input end of the operational amplifier U3 (used as a comparator), the inverting input end of the operational amplifier U3 is grounded through the resistor R19, the output end of the operational amplifier U3 is connected with the b pole of the triode Q4 (NPN triode) through the resistor R18, the e pole of the triode Q4 is grounded, and the output end of the operational amplifier U3 is grounded through the resistor R21;

the c pole of the triode Q4 is connected with one end of a relay coil, and the other end of the relay coil is connected with VCC; the contact switch of the relay is connected in series in a power supply circuit (or socket) of the electric equipment.

Meanwhile, the signal end is output to an ADC port (A/D conversion port) of the MCU through a voltage follower U4 and a resistor R27, so that real-time detection of current is realized.

(10) Anti-theft detection circuit based on infrared sensor

The infrared pair tube sensor works by taking the emitted infrared rays and the received infrared rays as media and consists of an infrared emitting tube, an infrared receiving tube, a comparator and the like. The presence or absence of movement of the bedroom valuables is monitored by an infrared sensor.

Working principle: as shown in fig. 11, the infrared signal is emitted from the emitting tube, and the receiving tube receives the infrared signal, and once the receiving tube does not receive the indication that there is an obstacle in the middle, the infrared signal can be used for detecting whether the object is moved or not. The module circuit can be well adapted to the ambient light, and can output high and low signal levels after being processed by the comparator. Has the advantages of interference resistance, easy realization, low cost and the like. The infrared receiving tube collects infrared information and then converts the infrared information into voltage signals to be output, and the voltage signals output by the sensor are shaped by the LM393 voltage comparator and then output level signals of the whole circuit. The circuit also has the functions of power indication and switch indication. The current is limited by a resistor of 1K in the circuit to prevent the current from being excessive. The PF12 pin of STM32F407 is used in the present system to connect with the data output pin of the infrared sensor. The main function is to provide the system with information on whether the position of the important object is moved or not. The circuit connection mode is as follows:

the first fixed end of the sliding rheostat R62 is connected with VCC (direct-current power supply voltage, 5V), and the second fixed end is connected with the ground; the tap end (sliding end) of the sliding rheostat R6 is connected with the inverting input end of the operational amplifier U8 (LM 393) and is used as a reference voltage;

The Vcc end is grounded through a resistor R58 and a transmitting tube to supply power for the transmitting tube; the first end of the infrared receiving tube is connected with the VCC end through R59, and the second end of the infrared receiving tube is grounded; the first end of the infrared receiving tube is connected with the non-inverting input end of an operational amplifier U8 (LM 393);

the output end of the operational amplifier U8 is connected with the VCC end through a resistor R60; the output of the operational amplifier U8 is used as the output of the comparator, i.e. the output of the anti-theft circuit.

The output end of the anti-theft circuit is also connected with the VCC end through a resistor R61 and a diode LED12, and the diode LED12 indicates that valuables are stolen when being on.

(11) Relay circuit diagram

As shown in fig. 12, the relay is an electronic switch control device, which has an input loop and an output loop, and the control signal of the input loop can control the connection and disconnection of the output loop, and is widely used in automatic control circuits.

Working principle: the input loop uses smaller current to control the connection of the internal magnetic induction coil pair to be connected and disconnected so as to control the signal output of the output loop, thereby having an automatic electronic switch with the function of being controlled by external signals. The relay control system is used as a control object of the system, and indirectly controls the electric appliance to be controlled by controlling the switch of the relay. The electric appliance needing to use the relay in the system is an access control switch and a water dispenser. In the system, the PG1 pin of STM32F407 is used for controlling the entrance guard switch, and the PD3 pin is used for controlling the water dispenser switch.

(12) Motor driving circuit

When the exhaust fan rotates and rains to recover clothes, the motor is needed, and the direct electrifying speed of the motor does not meet the design requirement, so that the speed of the motor during working is controlled, PWM waves are introduced, the PWM waves are pulse width modulation technology, the motor can be controlled in an analog mode, high current is needed for the motor to work, the MOS tube SI2302 is selected for driving in a circuit for combining PWM control and providing high current for the motor, and the controller controls the on-off of the MOS tube SI2302 by outputting the PWM waves, so that the purpose of controlling the motor speed is achieved. In the system, the pin PC0 of STM32F407 is connected with PWM1 and the pin PC1 is connected with PWM2. The circuit design is shown in fig. 13 and 14.

(13) Data transmission subsystem

ESP8266 is a WIFI module with ultra-low power consumption, which is transmitted through UART-WiFi, and provides a network solution of a complete system for the WIFI equipment on the market at present, and the ESP8266 can be independently operated by being used alone or used as a slave machine and other host controllers in a matching way. When the slave computer is operated, the communication connection can be carried out between the SPI/SDIO interface or the I2C/UART interface and the master computer. Thereby realizing the function of accessing to the internet.

Working principle: the operation is performed by providing two connection modes using the SDK. The first method adopts a UDP broadcast mode, an ESP8266 scans the lower AP to obtain related information of the AP, such as a working channel, then configures a WIFI chip to work on the channel which is scanned just to receive UDP packets, if not, continues to configure the ESP8266 to work on another channel, and the cycle is performed until the UDP packets are received. The second is AP access, where ESP8266 chips are driven to operate primarily using the Espressif AT instruction set. The serial port 6 of STM32F407 is connected with an ESP8266 module in the system, and the pins of PA1 are connected with TX and PA0 is connected with RX. The system has the main function of providing a data transmission mode based on a TCP/IP protocol for the system, enabling the system to be directly connected to the Internet and providing a data source for mobile phone terminal APP software. The circuit design is shown in fig. 15.

In addition, there is (13) GSM communication module

The main chip of the GSM communication module is SIM900A, which is a GSM/GPRS dual-frequency module. The performance is reliable and stable, the cost performance is high, and the diversified requirements of users can be met.

Working principle: the maximum downlink transmission rate is 85.6kbps, and the maximum uplink transmission rate is 42.8kbps. The system only uses AT instruction to complete the function of sending short message. In the system, serial port 3 and module serial port interface connection are used, and PB10 connection TX and PB11 connection RX are used. The main function is to provide for the transmission of information for the implementation of the security functions of the system.

(14) Speech recognition module

The voice recognition chip LD3320 is designed and produced by ICRoute company, the module comprises a voice signal processing part by a voice chip and a processor, and a voice signal acquisition part comprising an AD, DA converter, serial port, power supply voltage stabilizing and the like by a microphone, an operational amplifier chip, a triode and the like.

Working principle: through the specific voice optimization processing algorithm of ICrout company, the non-specific person voice recognition is completed, the prior recording and training are not needed, and the recognition accuracy is as high as 96%. Each recognition can be provided with 50 candidate recognition sentences, and the recognition sentences can be composed of single words, words and long short sentences, but the length of the recognition sentences cannot exceed 10 Chinese characters or 79 byte pinyin combinations. The serial port 6 of STM32F407 is used for connecting with a voice module in the system, and the PD2 pin is connected with TX and the PC12 is connected with RX. The main function is to provide voice recognition function for the system, collect voice command and output to the main controller.

In the invention, the spraying device is one of the cores;

the fire detection device is at least one of a fire sensor, a smoke sensor probe, a flame sensor and a thermal infrared probe, or the fire detection device adopts an infrared camera.

The spray device has 3 preferred methods:

Example 1:

as shown in fig. 16, the field area is divided into N zones, 301, and at least one fire sensor is disposed in each zone; the spraying device comprises N spray heads (303), wherein each subarea is provided with one spray head, and preferably, the spray heads are arranged on a ceiling above the subarea or a bracket above the subarea, and N is a natural number greater than or equal to 4. Where n=9;

example 2:

as shown in fig. 17, the spray device is a rotary spray device disposed on a ceiling above the field or on a stand above the field;

at this time, (1) the number of fire sensors is plural, and the fire sensors are distributed in an array; if one or the sensor detects that a fire exists in a certain area, the rotary spray device controls the spray gun on the rotary spray device to rotate so as to align to the area for spray fire extinguishment;

or (2) the fire sensor adopts an infrared camera, the position of a fire point is obtained through image processing, and then the rotary spray device controls the spray gun on the rotary spray device to rotate so as to align to the area where the fire point is located and spray and extinguish fire.

The rotary spraying device comprises a supporting seat, a rotary platform 118 and a rotary platform driving motor 121; the spray gun 108 is arranged on a rotary platform;

The rotary platform driving motor can drive the rotary platform to rotate through the first transmission mechanism; a spray gun driving motor 117 is arranged on the rotating platform, and the spray gun driving motor can control the depression angle of the main spray gun through a second transmission mechanism;

the first transmission mechanism is a gear or belt wheel transmission mechanism;

the second transmission mechanism is an electric push rod or a pull rope 116, when the second transmission mechanism is the pull rope, the lower end of the pull rope is arranged at the front end of the spray gun, and the upper end of the pull rope is wound on a rotating shaft of a spray gun driving motor; the spray gun is mounted on a gun rack 123 and is hinged to the gun rack, so that the front end of the spray gun is downward under the action of gravity, and the depression angle of the spray gun is controlled by a pull rope.

Example 3: spraying water by a water spraying vehicle

As shown in fig. 18, the crawler-type sprinkler is provided with a sub-camera 114 and a sub-spray gun 115.

The crawler-type water spraying vehicle is connected with the main water tank through a water pipe; and an auxiliary water tank 113 is arranged on the crawler-type water spraying vehicle. The sub-camera is used for monitoring water spraying actions and fire extinguishing site states, the auxiliary spray gun is used for spraying water, and the crawler-type water spraying vehicle is provided with a wireless communication module and is controlled by a remote terminal (such as a mobile phone).

The fire extinguishing control method comprises the following steps: step 1: monitoring the position of a fire point; step 2: MCU controls the spraying device to extinguish fire;

In step 1, there are 2 methods for monitoring the location of the fire: (1) Detecting a fire location by a plurality of fire sensors arranged in an array; (2) Monitoring the fire location by an infrared camera and based on image processing; (image processing is an existing mature technology); in step 2, there are 2 methods for controlling fire extinguishment: (1) Controlling the spray heads of the ignition area (subarea) to spray water; (2) And controlling the spray gun to rotate to aim at a fire point, and implementing water spraying fire extinguishing.

In addition, the MCU is connected with a display screen, and fig. 19 is a dimming circuit of the backlight of the display screen, that is, a brightness adjusting circuit;

the brightness adjusting circuit comprises an MCU, an LED lamp string, a triode, a potentiometer Rx and an A/D converter; the triode is an NPN triode; a knob switch is also arranged on the fixing frame of the display screen and is coaxially connected with the potentiometer Rx;

the potentiometer Rx and the first resistor R1 are connected in series to form a voltage division branch, one end of the voltage division branch is connected with the positive electrode Vcc of the power supply, and the other end of the voltage division branch is grounded; the connection point of the potentiometer Rx and the first resistor R1 is connected with the input end of the A/D converter; the output end of the A/D converter is connected with the data input port of the MCU;

the LED lamp string comprises a plurality of LED lamps connected in series; the anode of the LED lamp string is connected with the anode Vcc of the power supply; the negative electrode of the LED lamp string is connected with the C electrode of the triode, and the E electrode of the triode is grounded through a second resistor R2; the B pole of the triode is connected with the output end of the MCU. The power supply positive electrode Vcc is 5V, and the A/D converter is an 8-bit serial output type converter.

As shown in fig. 20, the constant current charging circuit charges the lithium battery, and in the constant current charging circuit, each element or reference numeral indicates:

VIN+ is the positive electrode of the input power.

VIN-input power negative electrode.

Vout+ - - - -the positive pole of the output power.

Vout— negative electrode of the output power supply.

VREF+ positive electrode of reference power supply

C1 is the input filter capacitance.

C2 is the output filter capacitance.

C3 is current sampling feedback filtering.

R1, R2, R5 and C3 form a current sampling feedback circuit.

R3 and R4 are voltage sampling feedback circuits.

D1 is an isolation diode.

The constant current charging circuit comprises a constant voltage driving chip and a current feedback circuit;

(1) The voltage output end of the constant voltage driving chip is a positive output end VOUT+ of the constant current charging circuit; the negative output end of the constant voltage driving chip is grounded;

the constant voltage driving chip is powered by the direct-current voltage power supply terminals VIN+ and VIN-;

(2) The current feedback circuit comprises resistors R1, R2 and R5 and a reference voltage end VREF+;

the reference voltage end VREF+ is grounded through resistors R1, R2 and R5 which are sequentially connected in series;

the connection point of the resistor R5 and the resistor R2 is a negative output end VOUT-of the constant current charging circuit;

the connection point of the resistor R1 and the resistor R2 is connected with the feedback end FB of the constant voltage driving chip.

The constant current charging circuit also comprises a voltage feedback circuit;

the voltage feedback circuit comprises resistors R3 and R4 and a diode D1;

the resistors R3 and R4 are connected in series and then connected between the positive output end VOUT+ of the constant current charging circuit and the ground; the connection point of the resistors R3 and R4 is connected with the anode of the diode D1; the cathode of the diode D1 is connected with the feedback end FB of the constant voltage driving chip.

Description of working principle:

and a stable reference power supply is used as a reference voltage, and R1, R2 and R5 are adopted to divide the voltage to obtain a voltage equal to FB, so that the internal PWM of the DCDC IC is adjusted through the FB to control the magnitude of the output current. For example, when the output current increases, the voltage across the sampling resistor R5 increases, and since vrfe+ is a fixed value, FB voltage increases, FB increases, and the duty cycle decreases, so that the output current decreases, and a complete feedback is completed, thereby achieving the purpose of stabilizing the current output.

Constant current calculation:

let R5 be VIo, and the output current be Io

The reference voltage is vref+=2.5v,

FB voltage is vfb=0.6v,

R5＝0.1Ω，R1＝40KΩ，R2＝10KΩ

then:

VIo＝Io*R5

VFB＝VIo+((VREF+-VIo)*R2/(R1+R2))

and (3) calculating:

Io＝(VFB*(R1+R2)-R2*VREF+)/R1*R5

equation if k= (VFB (r1+r2) -r2 vref+)/R1

Io＝K/R5

From the calculation formula, io output current has no relation with output voltage and input voltage, but only relates to VFB, R1, R2, VREF, and these parameters are all fixed in specific design (VFB is fixed at steady state, for fp7192 constant voltage chip, steady state value is 0.6 v), so K must be a fixed value, so the formula:

io=k/R5 has excellent linearity and has excellent controllability.

The specific values set above can be given by the above parameters:

Io＝(VFB*(R1+R2)-R2*VREF+)/R1*R5

＝(0.6*(40+10)-10*2.5)/40*0.1

＝1.25A

from the above equation, it can be seen that this scheme introduces a fixed VREF+, so that Io becomes an equation that is only linear with the R5 sampling resistor, and Io becomes constant, thereby achieving the purpose of constant current.

The constant current circuit in the scheme is characterized in that:

1. and stable fixed VREF+ voltage is used, so that the precision control and stability control are facilitated.

2. The current sampling is changed into resistor voltage division feedback, so that the method is simpler and more reliable.

3. The applicability is wide, and any circuit needing constant current can be used.

In addition, as shown in fig. 21, the camera (i.e., a video camera) includes a body 77 and a compound lens 72; a plurality of CCD sensors 76 are arranged in the machine body, and a photoelectric transmitting and receiving device 75 for aligning the lenses is arranged on the machine body;

the compound lens is provided with a rotating shaft 73; 4 sub-lenses 71 are integrated in the composite lens; the sub lenses are uniformly arranged along the circumferential direction of the composite lens; the rear end of the compound lens is also provided with a light reflecting sheet 74 which is matched with the photoelectric transmitting and receiving device; the machine body is also internally provided with a stepping motor for driving the lens to rotate. The photoelectric transmitting and receiving device and the light reflecting sheet can be multiple sets, preferably 2 sets, are axisymmetric, have better alignment effect, and can be considered to be aligned with the CCD sensor only after the 2 sets of photoelectric transmitting and receiving devices and the light reflecting sheet are aligned, so that the alignment precision is higher. The multiple sub-lenses have different focal lengths and are used for monitoring different visual angles, so that the flexibility is good.

In addition, the water spraying vehicle adopts a lithium battery as power, so the intelligent bedroom system is also provided with a charging system for spraying water for the water spraying vehicle. 22-25, the wireless charging module includes a support platform disposed in the recess 201 and a transmit coil 214 disposed on the support platform; the supporting platform comprises a bottom movable platform 202, an upper movable platform 216 and a lifting mechanism for connecting the bottom movable platform and the upper movable platform; a longitudinal translation mechanism is arranged on the bottom movable platform; the upper movable platform is provided with a transverse translation mechanism. The lifting mechanism is a cylinder type lifting mechanism or a scissor type lifting mechanism 215. The cylinder type lifting mechanism is a push rod type driving mechanism, such as a pneumatic cylinder or a hydraulic cylinder for driving. The longitudinal translation mechanism comprises a guide rail 205 and a first rack rail 206 which are arranged at the bottom of the concave part; the number of the guide rails is 2; the rack rail is arranged in parallel with the guide rail; the bottom of the bottom movable platform is provided with a plurality of travelling wheels 209 which can roll on the guide rails; the number of walking wheels is 4, and the number of walking wheels is 2 at one side. The front end of the bottom movable platform is provided with a first motor 203; a gear 207 is arranged on the rotating shaft of the first motor and is meshed with the first rack rail; when the first motor rotates, the bottom movable platform can be driven to longitudinally (front and back) translate along the first rack rail. The transverse translation mechanism comprises a second rack rail 211 and a second motor; the second rack rail is transversely arranged, and the left end or the right end of the upper movable platform of the second motor is arranged at the left end or the right end of the upper movable platform of the second motor; and a gear meshed with the second rack rail is arranged on a rotating shaft of the second motor, and when the second motor rotates, the upper movable platform can be driven to horizontally move along the second rack rail. The rotating shafts of the first motor and the second motor are respectively provided with a coded disc 208. The code wheel is used for detecting the number of turns of the motor, so that the code wheel can be converted into displacement of platform travelling. An electric movable cover plate 19 is arranged at the opening of the concave part. Electric refers to motor drive, or electric signal control hydraulic cylinder or cylinder drive. The movable cover plate is 2, a push rod for driving the movable cover plate is arranged in the concave part, and the upper end of the push rod is connected with the ground of the movable cover plate. The opening of the concave part is also provided with a pressing prevention mechanism 210, and the pressing prevention mechanism can support the movable cover plate when the movable cover plate is unfolded. The pressure-proof mechanism is square. Stainless steel or cast iron is adopted, and the strength is high. The wireless charging system of the water spraying vehicle further comprises a control unit, wherein the control unit comprises an MCU, and the transverse translation mechanism and the longitudinal translation mechanism are controlled by the MCU; the MCU is also connected with a communication module. The limit switch and the code disc output signals to the MCU; the first motor and the second motor are stepping motors. The first rack rail is positioned between the 2 guide rails. The rear end of the bottom movable platform is provided with a limit switch 204; the front end of the motor is provided with a limit switch 204. The limit switch acts to indicate that the front or rear is in place and stop the rotation of the motor, so that the safe operation of the whole equipment is ensured. The bottom movable platform is provided with a wire with a power plug 213. The wire is used for connecting and obtaining commercial power, thereby supplying power to the transmitting coil. The bottom movable platform is also provided with an MCU and a single-phase bridge type rectifying and inverting circuit; the single-phase bridge type rectifying and inverting circuit comprises a rectifying bridge and an inverting bridge, wherein the rectifying bridge adopts 4 power diodes, the inverter adopts 4 IGBTs, the connection mode is the prior art, and the G pole of the IGBTs is controlled by pulses sent by an MCU. The input side of the rectifier bridge is connected with the mains supply, and the output side of the rectifier bridge is connected with the transmitting coil through the inverter; the rectifier bridge is used for converting alternating current into direct current, and the inverter is used for converting the direct current into alternating current with different frequencies, and the frequency is changed to improve charging efficiency.

Claims

1. An intelligent bedroom system based on the Internet of things is characterized by comprising an MCU, a power supply module, a sensor module, an executing mechanism and a communication module;

the MCU drives the electric clothes hanger to automatically shrink and stretch through a motor;

the ventilation fan is controlled by the MCU;

the electric equipment comprises at least one of a water dispenser, an electric cooker and an electromagnetic oven;

the motor is a stepping motor, and the MCU controls the stepping motor to rotate by sending control pulses;

the sensor module further comprises an infrared sensor, and the MCU is connected with an alarm;

the camera is connected with the MCU;

the sensor module further comprises a flame sensor, and the actuating mechanism further comprises a spraying device; monitoring whether fire occurs in the bedroom through a flame sensor, monitoring whether valuable articles in the bedroom are moved through an infrared sensor, and monitoring whether the current in a bedroom circuit exceeds a value through a current detection circuit, and sending alarm information to a mobile phone number appointed by a system through a GSM communication module once abnormality is found;

Also comprises a standby power supply based on lithium batteries;

the communication module comprises a wired communication module and a wireless communication module; the wired communication module is a WLAN module, the wireless communication module is at least one of a WiFi module, a GPRS (general packet radio service), a 3G (third generation telecommunication), a 4G and a 5G communication module, and the intelligent bedroom system is connected with the server through the communication module; the intelligent bedroom system is in communication connection with the intelligent mobile phone through the communication module;

the door lock unlocking device also comprises an access control device based on the RFID card reader and the electric door lock, the RFID card is read, and the door lock is controlled to be unlocked after verification; the RFID technology is adopted, and the access control card is read through a card reader to obtain authorization information; when the user swipes the card, the system intelligently recognizes information of the user, automatically opens the access control system to allow access if the user swipes the card and does not allow access if the user swipes the card to be invalid;

after the main control end is provided with rules or conditions for automatic control, the control of bedroom electric lamps, water dispensers, exhaust fans and clothes airing motors is realized by means of environment monitoring data; if the system receives a voice command, the system automatically operates through voice recognition, the lamp is automatically turned on when the voice command of turning on the lamp is received, and the lamp is automatically turned off when the voice command of turning off the lamp is received;

Transmitting real-time data of the bedroom environment to a mobile client through WIFI (wireless fidelity) for display through a custom data transmission protocol, and receiving a control instruction sent to a bedroom main control system by mobile phone APP software;

in the power supply module, MP2359 is adopted to output 5V voltage to supply power for the peripheral equipment of the system; the ASM1117-3.3V voltage stabilizing chip supplies power for the MCU; the input end of the ASM1117-3.3V voltage stabilizing chip is connected with 5V voltage; diodes D3, D4 and D5 utilize the unidirectional conduction characteristic to prevent the reverse connection from burning out the system; the inductor L1 and the capacitors C22 and C23 in the circuit are used for filtering, so that the stability of the power supply output is ensured;

the display screen adopts a TFT liquid crystal screen, a driving chip of the display screen is ILI9341, and a touch chip is XPT2046; the liquid crystal display screen is used for providing a human-computer interaction interface and a control interface;

air quality detection circuit: the MQ-135 sensor collects gas information and then converts the gas information into voltage signals to be output, and the voltage signals output by the sensor are shaped by the LM393 voltage comparator and then output the level signals of the whole circuit; the serial single bus is used for communication, and the PF13 pin of the STM32F407 is used for connecting with the data output pin of the air quality sensor in the system; the MQ-135 mainly collects air quality data for the system; the output end of the MQ-135 is connected with the inverting input end of the operational amplifier LM393, the VCC end is grounded through a variable resistor R49, the output end of the variable resistor R49 is connected with the non-inverting input end of the operational amplifier LM393, the operational amplifier LM393 works in a comparator mode, the output end of the operational amplifier LM393 is the output end of the air quality detection circuit, the output end is connected with the VCC end through a diode LED10 and a pull-up resistor R52, and when the output is high, the LED10 is lightened; this indicates good air quality;

The system also comprises a lighting system controlled by the MCU;

the illumination detection circuit adopts a photoresistor as a photosensor, a PC11 pin of STM32F407 is used for being connected with a data output pin of the photosensor in the system, the PC11 pin is an ADC acquisition pin, signal voltage is acquired and analyzed in the STM32, so that the light intensity is obtained, and the main function of the module is to detect the change of ambient light and acquire the change to the system in time; the circuit connection mode is as follows:

the first fixed end of the sliding rheostat R6 is connected with VCC, and the second fixed end is grounded; the tap of the sliding rheostat R6 is connected with the inverting input end of the operational amplifier U1, the first end of the resistor R1 is connected with the VCC end, and the second end of the resistor R1 is grounded through a photoresistor; the second end of the resistor R1 is connected with the non-inverting input end of the operational amplifier U1; the output end of the operational amplifier U1 is connected with the VCC end through a resistor R2; the output end of the operational amplifier U1 is used as the output end of the comparator, namely the output end of the illumination detection circuit; the output end of the illumination detection circuit is also connected with a VCC end through a resistor R7 and a diode LED2, and the diode LED2 indicates that the illumination exceeds standard when being on;

RFID module circuitry:

PB4 pin and MISO line connection, PB5 pin and MOSI line connection, PB3 pin and SCK line connection and PG0 pin and SDA line connection of STM32F407 are used in the system; the RC522 chip is driven by the simulation SPI protocol to realize the radio frequency communication technology, and the read-write work of the IEC14443A protocol card is completed on the basis; the main function of the module is to enable the system to identify the access control card through the RC522 chip, thereby completing the access control function;

Flame detection circuitry:

the sensitivity of the circuit is regulated by the slide rheostat VR1, flame information is collected by the infrared receiving tube and then converted into voltage signals to be output, and the voltage signals output by the sensor are shaped by the LM393 voltage comparator and then output the level signals of the whole circuit; the PD6 pin of the STM32F407 is connected with the data output pin of the flame sensor in the system; the flame sensor circuit has the function of detecting whether fire exists in the bedroom or not for the system;

the current detection and relay control circuit of the electric equipment comprises:

the intelligent bedroom system can well prevent the bedroom safety problem by detecting the electricity consumption of the bedroom, the working voltage of a used current detection circuit is 5V, and the load power can be connected with 220V/40A equipment; the current transformer generates mutual inductance current through the bedroom alternating current wire, the larger the bedroom electric power is, the larger the mutual inductance current is, the smaller the bedroom electric power is, and the smaller the mutual inductance current is, so that a signal waveform can be output by using the voltage comparator, and the main controller can acquire the current information of the bedroom through AD (analog-to-digital) acquisition, thereby achieving the detection function; in the circuit design, alternating current is converted into direct current through four rectifier diodes, power supply filtering is carried out by using C3, a current loop is formed through R2, the circuit can obtain an output signal by measuring the voltage at two ends of R2, the output signal voltage is compared with a reference voltage through an MCP602 voltage comparator so as to control a relay, the relay plays the role of overcurrent power supply breaking protection, and two output signals are output, namely, one is analog quantity, the other is TTL high-low level and the other is AOUT; the main function is to detect bedroom current for the system; the current transformer L2 is connected with the resistor R17 in parallel, and an output signal of the current transformer passes through the bridge rectifier; the first end of the direct current side of the bridge rectifier is a signal end, and the second end is grounded; the signal end is grounded through a resistor R16 and a resistor R14; the connection point of the resistor R16 and the resistor R14 is connected with the non-inverting input end of the operational amplifier U3, the inverting input end of the operational amplifier U3 is grounded through the resistor R19, the output end of the operational amplifier U3 is connected with the b pole of the NPN triode Q4 through the resistor R18, the e pole of the triode Q4 is grounded, and the output end of the operational amplifier U3 is grounded through the resistor R21; the c pole of the triode Q4 is connected with one end of a relay coil, and the other end of the relay coil is connected with VCC; the contact switch of the relay is connected in series in a power supply circuit of the electric equipment; meanwhile, the signal end is output to an ADC port of the MCU through a voltage follower U4 and a resistor R27, so that real-time detection of current is realized;

Anti-theft detection circuit based on infrared sensor:

the infrared signal is emitted by the emitting tube, and the receiving tube receives the infrared signal, so that the infrared signal can be used for detecting whether the object is moved or not once the receiving tube does not receive the indication that the obstacle exists in the middle; the PF12 pin of the STM32F407 is connected with the data output pin of the infrared sensor in the system; the main function is to provide the system with information on whether the position of the important object is moved or not: the circuit connection mode is as follows:

the first fixed end of the sliding rheostat R62 is connected with VCC, and the second fixed end is grounded; the tap of the slide rheostat R6 is connected with the inverting input end of the operational amplifier U8 and is used as a reference voltage; the Vcc end is grounded through a resistor R58 and a transmitting tube to supply power for the transmitting tube; the first end of the infrared receiving tube is connected with the VCC end through R59, and the second end of the infrared receiving tube is grounded; the first end of the infrared receiving tube is connected with the non-inverting input end of the operational amplifier U8; the output end of the operational amplifier U8 is connected with the VCC end through a resistor R60; the output end of the operational amplifier U8 is used as the output end of the comparator, namely the output end of the anti-theft circuit; the output end of the anti-theft circuit is also connected with the VCC end through a resistor R61 and a diode LED12, and the diode LED12 indicates that valuables are stolen when being on;

And a relay circuit:

in the system, a PG1 pin of STM32F407 is used for controlling an entrance guard switch, and a PD3 pin is used for controlling a water dispenser switch;

a motor driving circuit:

when the exhaust fan rotates and rains to recover clothes, a motor is needed, the direct power-on speed of the motor does not meet the design requirement, so that the speed of the motor during working is required to be controlled, the MOS tube SI2302 is selected for driving, and the controller controls the on-off of the MOS tube SI2302 by outputting PWM waves, so that the aim of controlling the speed of the motor is fulfilled; the system uses the pin PC0 of STM32F407 to connect with PWM1 and the pin PC1 to connect with PWM2;

in the rainfall detection circuit, a first fixed end of the sliding rheostat R9 is connected with VCC, and a second fixed end of the sliding rheostat R9 is grounded; the tap of the sliding rheostat R9 is connected with the inverting input end of the operational amplifier U2, the first end of the resistor R3 is connected with the VCC end, and the second end of the resistor R3 is grounded through a raindrop sensor; the second end of the resistor R3 is connected with the non-inverting input end of the operational amplifier U2; the output end of the operational amplifier U2 is connected with the VCC end through a resistor R4; the output end of the operational amplifier U2 is used as the output end of the comparator, namely the output end of the rainfall detection circuit;

the system also comprises man-machine interaction equipment; the man-machine interaction equipment comprises a display screen and a data/instruction input device; the data/instruction input device is a keyboard or a touch pad;

The spraying device is a rotary spraying device arranged on a ceiling above the site or a bracket above the site;

at this time, the fire sensors are distributed in an array manner; if one or the sensor detects that a fire exists in a certain area, the rotary spray device controls the spray gun on the rotary spray device to rotate so as to align to the area for spray fire extinguishment;

the fire sensor adopts an infrared camera, and the position of a fire point is obtained through image processing, so that the rotary spray device controls a spray gun on the rotary spray device to rotate so as to align to the area where the fire point is located to implement spray fire extinguishing;

the rotary spraying device comprises a supporting seat, a rotary platform and a rotary platform driving motor; the spray gun is arranged on the rotary platform;

the rotary platform driving motor can drive the rotary platform to rotate through the first transmission mechanism; a spray gun driving motor is arranged on the rotating platform, and the spray gun driving motor can control the depression angle of the main spray gun through a second transmission mechanism;

the second transmission mechanism is an electric push rod or a pull rope, when the second transmission mechanism is the pull rope, the lower end of the pull rope is arranged at the front end of the spray gun, and the upper end of the pull rope is wound on a rotating shaft of a spray gun driving motor; the spray gun is arranged on the spray gun frame and hinged with the spray gun frame, so that the front end of the spray gun is downward under the action of gravity, and the depression angle of the spray gun is completely controlled by the pull rope;

The automatic control method comprises the following steps:

step 1: detecting a field state by a sensor;

step 2: controlling each executing mechanism through a preset control strategy, a field control instruction or a remote control instruction;

there are two control modes:

the specific control method comprises the following steps:

(1) Controlling access control; alarming the entrance guard;

detecting the intrusion of a person, and starting an alarm;

(2) Fire alarm and spray control;

(3) Temperature and humidity control and a humidifier; air-conditioning;

(4) Anti-theft control based on infrared detection;

(6) Based on the rainfall sensor, controlling the clothes hanger;

detecting the rainfall through a rainfall sensor, controlling the clothes hanger to shrink if the rainfall is higher than a threshold value, otherwise, controlling the clothes hanger to expand and dry clothes; and controlling the window to be closed;

(7) Controlling illumination; controlling light;

detecting illumination through an illumination sensor, wherein the illumination is higher than a threshold value, the lamp is turned off, and when the illumination is weak, an electric lamp is turned on, and the brightness of the electric lamp is regulated;

(8) Air quality detection and ventilation control;

detecting air quality through an air quality sensor, and opening an electric window or starting air conditioning ventilation when the air pollution degree is higher than a threshold value;

(9) Video monitoring