Intelligent study table and chair control scheme design

With the continuous development of social and economic level and industrial technology revolution, the application of scientific and technological products represented by information technology in all walks of life is becoming more and more popular, and the scale of smart furniture using new technologies such as computer chip processors as core components, intelligent processing systems, etc. Bigger and bigger, and gradually developed into an independent industry. The intelligent control of intelligent furniture realizes the automatic activation of furniture functions and satisfies people's pursuit of quality of life, but some of the traditional intelligent functions of furniture may be ignored, such as the common learning seat system, although in the product It has a slightly intelligent prototype in terms of its liftability, but its product positioning is limited to the use of adolescents or school-age children, and it cannot be applied to a large number of different social workers' needs, resulting in a family needing to purchase it to meet the needs of different people. The problem of multiple desks and chairs, therefore, there is still a vacancy in intelligent humanized design requirements in the product development of intelligent learning desks and chairs system.

1. Introduction to the intelligent learning desk and chair system based on single-chip microcomputer

1.1 The concept of intelligent learning desk and chair system

The intelligent learning table and chair system uses embedded hardware and software programs to collect multiple different types of sources and feedback signals in real time with a suitable structure, and intelligently simulates the human behavior process with a controller. According to the preset processing procedures, the various signals of various signals are recorded, logically judged and information fed back. The information management platform obtains the processed information input in time, so that the learning desk and chair system can analyze and judge the behavior of the user after being equipped with some artificial intelligence. It manages and takes actions in accordance with pre-set procedures to provide users with a convenient, efficient and comfortable working and learning atmosphere. The intelligent learning table and chair system adopts a variety of technology integration including traditional furniture manufacturing, electromechanical control, electronic information, digital communication, and mechanical transmission technology.

1.2 Features of the intelligent learning desk and chair system based on single-chip microcomputer

In the intelligent learning desk and chair system products, the single-chip microcomputer is the "control center". It is installed with sensors, communication components and mechanical devices in the intelligent learning desk and chair system, and the embedded control system is solidified inside it. The control system passes The application program controls and manages the sensors and mechanical devices in the intelligent learning desk and chair system products, and even uses the function of home bus technology (HBS) to connect the intelligent learning desk and chair system to the home intelligent system through communication equipment, so that Stay in tune. At the same time, various system parameters in the intelligent learning desks and chairs system products can be monitored in real time on the display screen of the host computer or the mobile app connected to the Internet, such as the status of the desks and chairs, the lighting conditions of the learning environment, and the duration of use. Use preset parameters or mobile APP to control various operations such as the lifting of the table and chair surface, the adjustment of the angle, the control of the brightness, and the reminder of the working status.

2. The composition of the intelligent learning desk and chair system

As an integrated control system intelligent learning desk and chair system, its system composition includes two parts: hardware and software. Hardware usually consists of five parts: control system, execution system, transmission system, sensor, table and chair body (working device); software mainly includes control programs.

(1) Control system: In the intelligent learning desk and chair system, the "central nervous system" as the control system is composed of an embedded computer system with a single-chip microcomputer as the core, memory and drive circuits and other important control modules. The special control program combines the special software platform with the system circuit of the microprocessor (CPU) or microcontroller (MCU), collects and processes various data, and calculates the control quantity after processing through logic and algorithm. At the same time, all the work of the learning desk and chair system is commanded by the interface circuit through the control language to issue instructions to each actuator of the system. The accuracy and authenticity of the automatic control of all the work of the learning desk and chair system is determined by the core control module, and the intelligent control of the system It is achieved by writing the program to be implemented into the single-chip microcomputer during design and reading and executing it through the single-chip microcomputer. Therefore, the value-to-function ratio of the system must be fully considered in the design.

(2) Execution system: the driving device that drives the actuator to move in the intelligent learning desk and chair system. According to the input electrical signal, the controller sends out the command signal of the line and angular displacement, and the terminal controlled unit makes a corresponding response by means of the power element. Actions. The system can generally use stepping motors, servo motors and other electric drive devices. Considering the size and space of the intelligent learning desk and chair system itself, it is appropriate to choose a motor with a small body and a large force when selecting the drive device in the execution system.

(3) Transmission system: As a power transmission mechanism in the intelligent learning desk and chair system, in order to realize the adjustment functions of the learning desk and chair such as height changes, angle changes, etc., the working device needs to use some transmission devices for direct physical actions.

(4) Sensor: A sensor is a detection device that can sense the measured information, and can transform the sensed information (such as physical strips) into electrical signals or other required forms of information according to certain rules and transmit them to other A physical arrangement of devices or organs that slowly brings objects to life. In the intelligent learning desk and chair system, the current state control quantity of the desk and chair system is detected by the sensor and notified to the controller, which forms the "sense" of the intelligent learning desk and chair system. The data basis for automatic adjustment in the intelligent learning desk and chair system is provided by sensors. The reliability of the execution and transmission system comes from the accuracy of the collected data. Accurate and stable sensors must be the first choice.

(5) Furniture body: In the smart learning desk and chair system, the learning desk and chair product itself is the main body structure of the system, and all other functional mechanisms of the smart learning desk and chair are attached to the body so that the entire system function can be realized.

(6) Software program: the main program, data acquisition program and other system function programs are the main body of the intelligent learning desk and chair system. Other software also includes control programs to realize system function requirements, service programs to test the system, man-machine interface, Peripheral equipment control and self-test procedures to ensure the safe operation of the system, etc.

3. Design method of intelligent learning desk and chair system function

3.1 Intelligent adjustment

When the user is reading, writing, etc., the desktop is designed to automatically adjust the function, including functional angle adjustment: seat bevel (the inclination angle of the seat surface relative to the horizontal plane), back bevel angle (the angle between the backrest and the vertical plane), The self-adaptive adjustment of the lumbar pillow position provides the user with a reasonable sitting posture or a comfortable sitting posture transformation through adjustment. Functional height adjustment: seat height and table height, backrest height, armrest height automatic adjustment. Thereby ensuring the user's convenience and preventing arm fatigue. The distance detection module uses an infrared diffuse reflection sensor to detect the actual distance. By comparing the distance matched by the user with the data of the human body scale, the large deviation that occurs is corrected in time to ensure that the seat system is always in good condition. For the automatic adjustment part, the movement trajectory is set according to the data of the distance detection module, and the rotating screw driven by the DC motor converts the rotary motion into a linear motion as a displacement change device. The function of automatic displacement change is controlled by controlling the movement time and speed of the screw. to fulfill.

3.2 Intelligent lighting

A good lighting environment is the guarantee of learning and an important factor affecting learning efficiency. In the learning environment, you are exposed to light at close range, and the continuous use time is generally relatively long. Too strong or too weak lighting can damage eye health. Intelligent lighting is to embed the lighting function into the learning table, through the photoresistor, detect and alarm the external environment and the strength of artificial light, and use the pulse width modulation (PWM) control method from the aspects of illuminance, irradiation time, and irradiation method Intelligent adjustment, from the user's point of view, ensures that the light is suitable and the time is appropriate when studying and working, and enjoys the most comfortable experience, and can also achieve the purpose of preventing eye fatigue and reducing myopia.

3.3 Smart Tips

When the desktop in the learning desk and chair system is piled up messily, or the weight of the stored or loaded items exceeds the carrying capacity of the desk and chair, etc. in abnormal use, the learning desk and chair system will issue a warning to ensure the cleanliness and safety of the learning desk and chair. When the user studies for a long time or works in the same posture for a long time, the sitting posture detection module of the system uses the single-chip microcomputer as the central processing unit of the main control module, and uses the data collected by the timer and the infrared diffuse reflection sensor in the system, according to a certain logic After analyzing and judging, notify the user whether the sitting posture is reasonable or not. According to the parameters set in advance according to the user's habits, compared with the situation during use, the smart learning table can issue corresponding rectification instructions for unreasonable states, and even make work plans and memos to help users develop good habits and Form a healthy work and rest schedule.

3.4 Other intelligent functions

The external environment has a great influence on learning, so it is necessary to make learners in a comfortable environment and reduce the impact. The environmental monitoring module set in the intelligent learning desk and chair system processes data such as temperature and humidity through the DHT sensor, monitors the quality of the learning environment, and takes corresponding measures if it is not up to standard, such as realizing the temperature of the learning desk and chair through intelligent temperature control Automatically adjust or connect to the indoor air-conditioning system to adjust the temperature, so that users are in a safe and comfortable environment. Users can grasp the usage situation through the big data analysis results collected from various types of data collected by sensors and transmitted to the cloud service platform, and effectively adjust and improve the deficiencies after comparison, so as to make better use, thus, Intelligent functions such as these will form a complete system to improve learning efficiency.

4. Hardware technical design of intelligent learning desk and chair system

In terms of hardware technology, the single-chip microcomputer technology that is the most critical "central nervous system" in the intelligent learning desk and chair system mainly considers the following aspects during design:

(1) CMOS: CMOS chips manufactured by semiconductor technology have low static power consumption during operation and can effectively control the loss of power consumption. Based on CMOS, power consumption can be finely managed, and CMOS-based single-chip microcomputers can meet the needs of intelligent learning desk and chair systems. Energy saving and environmental protection requirements.

(2) Large-capacity: With the improvement of learning and working conditions, the expectation that the intelligent learning desk and chair system will be multi-purpose and multi-functional is also increasing. Only a large-capacity memory can solve the high performance of these multi-functional integration technologies on the microprocessor. Therefore, it is necessary to continuously improve storage technology, adopt new technology, manufacture and apply large-capacity on-chip memory to meet the demand.

(3) High performance: the role of the reduced instruction set (RISC) structure and the application of the superscalar and super pipeline structure, the performance of the central processing unit is greatly improved, thereby further accelerating the processing ability and operation speed of the instruction, and the corresponding System control reliability is further improved. The improved computing speed and reliability make it possible to introduce virtual peripherals, and simulate I/O functions in the system through software to meet the multi-functional and high-performance requirements of the future intelligent learning desk and chair system.

(4) Built-in peripheral circuits: With the continuous improvement of semiconductor integration technology and technology, the peripheral circuits of single-chip microcomputers tend to be built-in. The peripherals such as alarm buzzers, monitoring clocks, and screen display drivers commonly used in intelligent learning seat systems Functional devices can be integrated into the single-chip microcomputer, so that the structure of the single-chip microcomputer is further simplified and standardized, and the pins are reduced accordingly.

Summarize

The rapid development of smart home products has greatly improved people's lives, but there is still a long way to go in the application of modern information technology. Actively exploring a smart learning desk and chair system with complete smart functions to improve learning efficiency, it is necessary to continuously improve and Explore the effective application of single-chip technology so that it can better serve people's lives.

The above is an example of the development of intelligent learning desks and chairs introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have the development needs of smart desk and chair solutions, you can trust us. We represent a variety of single-chip microcomputers, voice chips, dual-mode Bluetooth ICs, and wifi chips. Brands include Songhan MCU, Yingguang MCU, Jerry Bluetooth, Ankai Bluetooth, Allwinner, and Realtek. Our technical services include: PCB design, microcontroller development, Bluetooth solutions, software and hardware custom development, APP development, small program development, WeChat official account development, etc. It can also undertake the design of intelligent electronic products, the development of living appliances, the research and development of beauty equipment, the application of Internet of things platform, the smart home control system, the development of TWS earphones, Bluetooth earphone speakers, the development of children's educational toys, the design of electronic education products, etc.