WO2020151076A1

WO2020151076A1 - Indoor air circulation system based on blockchain technology

Info

Publication number: WO2020151076A1
Application number: PCT/CN2019/079259
Authority: WO
Inventors: 肖�琳
Original assignee: 杭州美时美刻物联网科技有限公司
Priority date: 2019-01-24
Filing date: 2019-03-22
Publication date: 2020-07-30
Also published as: CN109869870A

Abstract

An indoor air circulation system based on blockchain technology, comprising a detection unit, an NBIoT communication device, a cloud server, a single-chip microcomputer (7), a window, and an air circulation electric fan (3). The window comprises a shutter (4) and a driving device (5) for driving the shutter (4) to be opened/closed. The air circulation electric fan (3) is arranged indoors. The detection unit uploads detection data to the single-chip microcomputer (7). The single-chip microcomputer (7) stores the data and uploads the detection data to the cloud server by means of the NBIoT communication device. The detection unit comprises temperature and humidity sensors (6, 9), a door magnetic sensor (2), and a wind speed sensor (8). The door magnetic sensor (2) is mounted on a door frame, and the wind speed sensor (8) is arranged outdoors. A user edits the gear of the air circulation electric fan (3) and the opening/closing state of the shutter (4) into a command having an eight-bit data length and sends the command to the cloud server by means of a mobile communication device. The cloud server receives the command, broadcasts the command to other cloud server nodes, and then sends the command to the single-chip microcomputer (7) specified by the user to control the gear of the air circulation electric fan (3) and the opening/closing state of the shutter (4).

Description

An indoor air circulation system based on blockchain technology

Technical field

The invention relates to the field of smart homes, and more specifically to an indoor air circulation system based on blockchain technology.

Background technique

At present, in the field of smart home, RFID sensing is often used to determine whether a person is at home, and RFID is subject to the limitation of short transmission distance, so that only when the user enters the home, the entire device will enter the indoor occupant mode, and there is more than one person at home in life. The situation of forgetting to carry the RFID wristband/card makes the indoor circulation system unable to determine whether there are people in the room.

In terms of information security, many smart homes do not consider the protection of information security, causing hackers to directly hack into devices to steal user information. The chaos of user information being trafficked cannot be eradicated and will eventually be listed for sale by criminals. Currently, there is no indoor air circulation system based on blockchain technology on the market.

Summary of the invention

In order to solve at least one aspect of the above technical problems, the present invention provides the following solutions.

An indoor air circulation system based on blockchain technology includes a detection unit, an NBIoT communication device, a cloud server, a single-chip microcomputer, a window, and an air circulation electric fan. The window includes shutters and a driving device for opening/closing the shutters. The air circulation electric fan is arranged in the room, the detection unit uploads detection data to the single-chip microcomputer, and the single-chip microcomputer uploads the detection data to the cloud server through the NBIoT communication device while storing the data. The detection unit includes a temperature and humidity sensor, Door magnetic sensor, wind speed sensor, the door magnetic sensor is installed on the door frame, and the wind speed sensor is installed outdoors; by setting up various sensors, the wind speed, door opening and closing, temperature and humidity are converted into digital signal form, which facilitates the data transmission.

The NBIoT communication device is divided into an NBIoT communication node and an NBIoT communication module, and the NBIoT communication module is divided into a first NBIoT communication module, a second NBIoT communication module, a third NBIoT communication module, and a fourth NBIoT communication module; the NBIoT communication The node is connected to a wireless router, the wireless router is connected to the single-chip microcomputer, and the newly connected and disconnected ip addresses are packaged and sent to the single-chip microcomputer; the single-chip microcomputer is connected to the driving device and the air circulation electric fan; the single-chip microcomputer is set with a shutdown threshold, When the wind speed or humidity is greater than the closing threshold, the single-chip microcomputer outputs instructions to control the driving device to close the shutters and control the air circulation electric fan to close; multiple NBIoT communication modules are set up so that the sensor transmits data without requiring too long wires to connect to the single-chip microcomputer. Uploading the data to the cloud server first is beneficial to information security and leverages the security features of blockchain technology.

The temperature and humidity sensor is divided into a first temperature and humidity sensor and a second temperature and humidity sensor, the first temperature and humidity sensor is arranged on the wall of the indoor living room, the second temperature and humidity sensor is arranged on the outdoor wall; the first temperature and humidity sensor The sensor is connected to the first NBIoT communication module, the second temperature and humidity sensor is connected to the second NBIoT communication module, and the detected temperature and humidity data is transmitted to the NBIoT communication node through the first and second NBIoT communication modules The NBIoT communication node classifies and transmits the received temperature and humidity data to the single-chip microcomputer and uploads it to the cloud server through a network device. The single-chip microcomputer stores an ip address designated by the user, and the ip address is sent from the cloud server to the wireless router. The router is transmitted to the single-chip microcomputer; the door magnetic sensor is connected to the third NBIoT communication module, and the wind speed sensor is connected to the fourth NBIoT communication module; by setting the temperature and humidity sensors indoors and outdoors, it is beneficial to collect data diversity and avoid special The indoor humidity is too high under conditions; upload the door switch status and wind speed data to the cloud server, which is convenient for direct viewing.

Furthermore, the user sets a humidity threshold in advance. When the humidity detected by the first temperature and humidity sensor is greater than the preset humidity threshold, the single-chip microcomputer controls the air circulation fan to rotate at 500 r/s, and the air circulation fan The direction of the wind is towards the ground. The air circulation electric fan faces the ground in order to accelerate the air convection on the ground, thereby accelerating the adjustment of indoor humidity.

Furthermore, when the humidity detected by the second temperature and humidity sensor received by the single-chip microcomputer is greater than 80% or the temperature is lower than 15°, the single-chip microcomputer outputs the "manual operation" status and uploads it to the cloud server through the NBIoT communication node. Control the driving device to close the windows and turn off the air circulation fan. In the case of excessive external humidity, manual operation is required, because opening the window at this time will cause a large area of the indoor roof to encounter condensed water, which is a hidden danger to the building surface.

Furthermore, when the humidity detected by the first temperature and humidity sensor received by the single-chip microcomputer is greater than 70% or the temperature is lower than 18°, the single-chip microcomputer turns off the air circulation fan and controls the driving device to close the windows to prevent the indoor temperature from being too low or too humid. .

A method for using an indoor air circulation system based on blockchain technology includes the following steps:

Step 1: When the wireless router receives a specific IP address connection request, it sends the IP address to the single-chip microcomputer, compares the IP address in its own storage unit to determine the user identity, and sends it to the cloud through the NBIoT communication device Server, the cloud server records that the user identity is marked as "door in" state, and broadcasts to other cloud server nodes to record;

Step 2: The door sensor detects the opening of the door and sends a high-level pulse signal to the single-chip microcomputer. After the single-chip receives the high-level pulse signal, it is determined that the user has entered the room and communicates via the NBIoT The device sends the indoor occupancy status to the cloud server, and the cloud server marks the "indoor" status after receiving the indoor status and broadcasts it to other cloud server nodes for recording;

Step 3: When the cloud server records that the user identity is marked as "into the door" state, when the single-chip microcomputer detects that the ip address packaged and sent by the wireless router is the ip address specified by the user, the current gear state is interrupted and adjusted according to the number of currently connected WiFi For the gear position of the air circulation fan, the single-chip microcomputer controls the driving device to open the shutters;

Step 4: The speed of the air circulation electric fan output by the single-chip microcomputer is W=10(N-1)*S*B+B,

W is the speed, N is the number of WiFi connections, S is the current indoor air humidity, and B is 100 rpm in the first gear;

Step 5: When the second temperature and humidity sensor detects that the humidity is greater than 60%, the single-chip microcomputer controls the driving device to close the blinds;

Step 6: When the single-chip microcomputer detects that there is no user-specified ip address in the ip address packaged and sent by the wireless router, it restores to the previous gear state and runs the mark "User Away", uploads it to the cloud server and broadcasts it to other cloud server nodes to record.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a flowchart of an embodiment of the present invention.

Reference signs: 1-door; 2-door magnetic sensor; 3-air circulation fan; 4-blinds; 5-driving device; 6-first temperature and humidity sensor; 7-single-chip computer; 8-wind speed sensor; 9-second Temperature and humidity sensor.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for clarity and conciseness, descriptions of known functions and configurations are omitted.

It should be understood that the “one embodiment” or “an embodiment” mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

In various embodiments of the present invention, it should be understood that the size of the sequence number of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not be implemented in the present invention. The implementation process of the example constitutes any limitation.

It should be understood that the term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist. , There are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

As shown in Figure 1, an indoor air circulation system based on blockchain technology includes a detection unit, an NBIoT communication device, a cloud server, a single-chip microcomputer 7, a shutter 4, a driving device 5 that drives the shutter to open/close, and an air circulation electric fan The air circulation electric fan is installed indoors and faces the ground, and is used to accelerate the convection of hot and cold air in the room, so that the indoor air humidity environment is always kept within a comfortable range of the human body. The driving device 5 can open and close the blinds 4, the detection unit uploads detection data to the single-chip microcomputer 7, and the single-chip microcomputer 7 stores the data while uploading the detection data to the cloud server through the NBIoT communication device. In order to upload data and record user preferences, data can be accumulated for future intelligent regulation of indoor air circulation.

The detection unit includes a temperature and humidity sensor, a door magnetic sensor 2, a wind speed sensor 8 and a noise decibel measuring module. The door magnetic sensor 2 is installed on the door frame, and the door magnetic sensor 2 is installed on the door frame to sense the movement of the door panel to determine the door 1 Open and close, and convert the analog quantity formed by the open/closed state of the door 1 into a digital signal for storage; the wind speed sensor 8 is placed outdoors, and the analog quantity output by the sensed external wind speed is converted into a digital signal for storage; The humidity sensor is divided into a first temperature and humidity sensor 6 and a second temperature and humidity sensor 9. The first temperature and humidity sensor 6 is placed on the wall of the indoor living room, and the second temperature and humidity sensor 9 is placed on the outdoor wall; The working principle is to detect the temperature and humidity in the air through the sensor, after measuring the temperature and humidity, the analog quantity is converted into a digital signal output according to a certain rule.

The NBIoT communication device is divided into an NBIoT communication node and an NBIoT communication module, and the NBIoT communication module is divided into a first NBIoT communication module, a second NBIoT communication module, a third NBIoT communication module, and a fourth NBIoT communication module; The temperature and humidity sensor 6 is connected to the first NBIoT communication module, the second temperature and humidity sensor 9 is connected to the second NBIoT communication module, the door sensor 2 is connected to the third NBIoT communication module, and the wind speed sensor 8 is connected to the second NBIoT communication module. Four NBIoT communication modules; connect each sensor with the NBIoT communication module, and upload the data detected by the sensors to the NBIoT communication node through the NBIoT communication module. Since the NBIoT communication node is connected to a wireless router, the wireless router is connected to the cloud platform Finally, the data detected by the sensor is stored in each server of the cloud platform; the wireless router is connected with the single-chip microcomputer 7 to realize the communication connection between the single-chip 7 and the cloud server.

Because the distance between the temperature and humidity sensor, the wind speed sensor 8, the door sensor 2 and the single-chip microcomputer 7 is very long, the use of wire connection will cause the wiring to be too long and it is too difficult to install the indoor circulation system in the existing decorated house. Connect the above-mentioned sensors through the NBIoT communication module and upload information to the NBIoT communication node. Since the NBIoT communication node is connected to the wireless router, and the single-chip microcomputer 7 is connected to the wireless router; finally the single-chip microcomputer 7 will receive the information detected by each sensor and control it accordingly Drive device 5 and air circulation electric fan.

According to the characteristics of blockchain technology, the single-chip microcomputer 7 needs to send a command and report to the cloud server, and then the cloud server broadcasts to each cloud server node; because the blockchain needs to encrypt the time axis, this encryption feature can be used to eliminate The hacker imitates the input command to control the indoor air circulation system. The user can package and send a specific ip address (such as the ip address of the user's mobile communication device) to the single-chip microcomputer 7 through the mobile communication device.

Now in life, using mobile communication devices such as mobile phones, people entering the room will choose to connect to the indoor WiFi for entertainment, and the homeowner's mobile phone will connect to this WiFi hotspot by default after a successful connection. The present invention uses the ip address of the WiFi connection as a condition for determining whether a person enters the house.

The single-chip microcomputer 7 may be provided with a closing threshold value. When the wind speed or humidity is greater than the threshold value, the single-chip microcomputer 7 outputs an instruction to control the driving device 5 to close the shutters 4 and control the air circulation electric fan to close.

In one embodiment, the user edits the stall position of the air circulation fan and the open/close state of the shutters to the cloud server through the mobile communication device, and sends the command to the cloud server, and the cloud server receives the command and broadcasts it to other cloud server nodes Then it is sent to the MCU designated by the user to control the gear position of the air circulation electric fan and the open/close state of the blinds. By uploading the control command to the cloud server, the cloud server sends it on its behalf. Since the cloud server and the single-chip microcomputer are connected based on blockchain technology, hackers can avoid being hacked into the system.

In another embodiment, the user sets the humidity threshold in advance. When the humidity detected by the temperature and humidity sensor is greater than the preset humidity threshold, the single-chip microcomputer 7 controls the rotation speed of the air circulation fan 3 to 500 r/s, and the air circulation fan outputs The wind toward the ground accelerates the air convection on the ground and restores the indoor air humidity to the user-set condition.

In one embodiment, when the humidity detected by the second temperature and humidity sensor 9 received by the single-chip microcomputer 7 is greater than 80% or the temperature is lower than 15°, the single-chip microcomputer 7 outputs the "manual operation" status and uploads it to the NBIoT communication node. The cloud server closes the window and the air circulation fan 3; because in the south, excessive humidity will cause water to accumulate on the indoor floor and mold the room, so it is necessary to wait for the user to manually open the window to turn on the air circulation fan 3 to avoid humidity in the house.

In one embodiment, when the humidity detected by the first temperature and humidity sensor 6 received by the single-chip microcomputer 7 is greater than 70% or the temperature is lower than 18°, the single-chip microcomputer 7 turns off the air circulation fan 3 and closes the window to avoid the indoor temperature from being too low Or too humid.

When the humidity detected by the first temperature and humidity sensor 6 received by the single-chip microcomputer 7 is greater than 70% or the temperature is lower than 18°, the single-chip microcomputer 7 turns off the air circulation fan 3 and closes the window to prevent the indoor temperature from being too low or excessively humid. Because there is a significant temperature difference between indoor and outdoor, if you only consider the outdoor temperature and humidity as the standard, the indoor temperature will be lower than the outdoor temperature. Studies have shown that the human body will feel cold when it is below 18°, so the shutters 4 and the air circulation fan need to be closed. 3.

As shown in Figure 2, the process steps of an embodiment of the present invention without manual intervention to change the 3 gears of the air circulation fan are:

Step 1: When the wireless router receives a specific IP address connection request, it sends the IP address to the single chip microcomputer 7, and compares the IP address in its own storage unit to determine the user identity, and sends it to the NBIoT communication device A cloud server, where the cloud server records that the user's identity is marked as a "door in" state, and broadcasts to other cloud server nodes to record;

Step 2: The door sensor 2 senses the opening of the door, and sends a high-level pulse signal to the single-chip microcomputer 7. After receiving the high-level pulse signal, the single-chip microcomputer 7 determines that the user has entered the room and passed the The NBIoT communication device sends the indoor occupant status to the cloud server, and the cloud server marks the "indoor" status after receiving the indoor status and broadcasts it to other cloud server nodes for recording;

Step 3: When the cloud server records that the user identity is marked as "incoming", when the single-chip microcomputer 7 detects that the ip address packaged and sent by the wireless router is the ip address specified by the user, the current gear state is interrupted, according to the number of currently connected WiFi Adjust the gear position of the air circulation fan, the single-chip microcomputer 7 controls the driving device 5 to open the shutters 4;

Step 4: The rotation speed of the air circulation electric fan output by the single chip microcomputer 7 is W=10(N-1)*S*B+B,

Step 5: When the second temperature and humidity sensor 9 detects that the humidity is greater than 60%, the single-chip microcomputer 7 controls the driving device 5 to close the blinds 4;

Step 6: When the single-chip microcomputer 7 detects that there is no user-specified ip address in the ip address packaged and sent by the wireless router, it restores to the previous gear state and runs the mark "User Away", uploads it to the cloud server and broadcasts it to other cloud server nodes for recording.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contribution as needed, but as long as the protection of the present invention The scope is protected by patent law.

Claims

An indoor air circulation system based on blockchain technology, including a detection unit, NBIoT communication device, cloud server, single-chip microcomputer (7), windows and air circulation electric fans, the windows including shutters (4) and driving shutters to open/close The driving device (5) of the air circulation fan is installed indoors, the detection unit uploads detection data to the single-chip microcomputer (7), and the single-chip microcomputer (7) stores the data and detects the data through the NBIoT communication device The data is uploaded to the cloud server, characterized in that: the detection unit includes a temperature and humidity sensor, a door magnetic sensor, and a wind speed sensor (8), the door magnetic sensor is installed on the door frame, and the wind speed sensor (8) is installed outdoors;

The NBIoT communication device is divided into an NBIoT communication node and an NBIoT communication module, and the NBIoT communication module is divided into a first NBIoT communication module, a second NBIoT communication module, a third NBIoT communication module, and a fourth NBIoT communication module;

The temperature and humidity sensor is divided into a first temperature and humidity sensor (6) and a second temperature and humidity sensor (9), the first temperature and humidity sensor (6) is arranged on the wall of the indoor living room, and the second temperature and humidity sensor ( 9) Placed on an outdoor wall; the first temperature and humidity sensor (6) is connected to the first NBIoT communication module, and the second temperature and humidity sensor (9) is connected to the second NBIoT communication module. 1. The second NBIoT communication module transmits the detected temperature and humidity data to the NBIoT communication node;

The door magnetic sensor is connected to the third NBIoT communication module, the wind speed sensor (8) is connected to the fourth NBIoT communication module; the NBIoT communication node is connected to a wireless router, and the wireless router is connected to the single-chip microcomputer (7) to connect the new And the disconnected IP address are packaged and sent to the single-chip microcomputer (7); the single-chip microcomputer (7) is connected to the driving device (5) and the air circulation electric fan; the single-chip microcomputer (7) is set with a shutdown threshold, when the wind speed or humidity is greater than For the closing threshold, the single-chip microcomputer (7) outputs an instruction to control the driving device (5) to close the blinds (4), and to control the air circulation electric fan to close;

The NBIoT communication node classifies and transmits the received temperature and humidity data to the single-chip microcomputer (7) and uploads it to the cloud server through a network device. The single-chip microcomputer (7) stores an IP address designated by the user, and the IP address is sent from the cloud server to the wireless Router, the wireless router transmits to the single-chip microcomputer (7).
The indoor air circulation system based on blockchain technology according to claim 1, characterized in that: when the humidity detected by the first temperature and humidity sensor (6) is greater than a preset humidity threshold, the single-chip microcomputer (7) controls the The rotation speed of the air circulation electric fan (3) is 500 r/s, and the air outlet direction of the air circulation electric fan faces the ground.
The indoor air circulation system based on blockchain technology according to claim 1, characterized in that: when the second temperature and humidity sensor (9) received by the single-chip microcomputer (7) detects the humidity is greater than 80% or the temperature is lower than 15° At this time, the single-chip microcomputer (7) outputs the "manual operation" state and uploads it to the cloud server through the NBIoT communication node and controls the driving device (5) to close the window and the air circulation fan (3).
The indoor air circulation system based on blockchain technology according to claim 1, characterized in that: when the first temperature and humidity sensor (6) received by the single-chip microcomputer (7) detects the humidity is greater than 70% or the temperature is lower than 18 When °C, the single-chip microcomputer (7) turns off the air circulation fan (3), and the control driving device (5) closes the windows to prevent the indoor temperature from being too low or too humid.
A method for using an indoor air circulation system based on blockchain technology according to any one of claims 1 to 4, comprising the following steps:

Step 1: When the wireless router receives a specific IP address connection request, it sends the IP address to the single-chip microcomputer (7), and compares the IP address in its own storage unit to determine the user identity, and sends it to the NBIoT communication device In the cloud server, the cloud server records that the user identity is marked as "into the door" state, and broadcasts to other cloud server nodes to record;

Step 2: The door magnetic sensor senses the opening of the door (1) and sends a high-level pulse signal to the single-chip microcomputer (7). After the single-chip (7) receives the high-level pulse signal, it is determined that the user has entered In the room, the occupant status in the room is sent to the cloud server through the NBIoT communication device, and the cloud server marks the status of "in the room" after receiving the indoor status and broadcasts it to other cloud server nodes for recording;

Step 3: When the cloud server records that the user identity is marked as "into the door" state, when the single-chip microcomputer (7) detects that the IP address packaged and sent by the wireless router is the user-specified IP address, it interrupts the current gear status, and according to the current The number of WiFi is connected to adjust the gear position of the air circulation fan, and the single-chip microcomputer (7) controls the driving device (5) to open the blinds (4);

Step 4: The speed of the air circulation electric fan output by the single-chip microcomputer (7) is W=10(N-1)*S*B+B,

W is the speed, N is the number of WiFi connections, S is the current indoor air humidity, and B is 100 rpm in the first gear;

Step 5: When the second temperature and humidity sensor (9) detects that the humidity is greater than 60%, the single-chip microcomputer (7) controls the driving device (5) to close the blinds (4);

Step 6: When the single-chip microcomputer (7) detects that there is no user-specified IP address in the IP address packaged and sent by the wireless router, it restores to the previous gear state. The operation mark "User Away" is uploaded to the cloud server and broadcast to other cloud server nodes. recording.