Liguo Tian

Design of Smart Home Control Terminal Based on ZigBee and Electronic Technology

With the improvement of people’s living standard and the development of the embedded technology, communication technology and network technology, the living environment of smart home has become a kind of development trend for the future home life. In view of the growing demand of smart home system and the widespread use of the embedded technology, it proposed a kind of smart home control terminal based on the ZigBee technology. The control terminal using STM32F103VC microprocessor as control core, combined with ZigBee technology and sensor technology, realized to control the environmental temperature, illuminance, switches of household appliances, shut of doors and windows wirelessly and intelligently. The result shows that, the intelligent control terminal is simple and reliable, it works well.

Research of the robot for the elderly based on star positioning

With acceleration of the population aging process, the people pay more and more attention on the development of the robot for the elderly. On the basis of technical research and development of service robot positioning technology in recent years, the paper designed the system of the robot for the elderly based on star positioning. The system used ARM9 processor S3C2440 as the core, equipped with IPC and star positioning module and various sensor modules, could complete some assistant works for the old peoples living, such as stable walking, environmental monitoring, grasping objects and so on. After tested, the system works well and achieved the design requirements.

LED toning system based on NRF24L01 wireless control

As a new generation of environmental light source, LED has been widely used in many areas because of high efficiency, low driving voltage, low power consumption, long life and other characteristics; a variety of colored lights based on the LED is used everywhere. Based on the three primary colors principle and PWM technology, it designed LED toning system, it could achieve a variety of color, and present a wireless control scheme based on NRF24L01. The scheme with the core of ATmega16L microcontroller configured wireless radio frequency modules NRF24L01 and TFT 2.4 inch touch screen and achieved LED lights brightness and color transformation through writing simple human-machine interface. After the practical application, the toning system works well.

A kind of imitated environment system for plant growth based on LED light source

Along with the continuous development of LED technology, LED light source gets more attention in the field of research of plant cultivation because of its small volume, long lifetime, good spectrum property, high luminous energy utilization, adjustable light quality and intensity and so on. According to the demand of plant growth environment, the paper designed a kind of imitated environmental system for plant growth based on LED light source. The system with the core of ATmega128L micro-controller, collocate with LED board, humiture sensor and CO2 sensor and so on, could imitate natural temperature, humidity and illumination etc., and adjust all kinds of parameters to set various combination ecotope to fit plant growth. After actual application, it works well.

Time and frequency domain analysis to plant electrical signal of swallow palm and anthurium under controlled LED environment

To explore the relationship between the plant electrical signal and light intensity under the controlled environment has great significance for the automation development of modern agriculture. The research sets six different LED light conditions to cultivate with swallow palm and anthurium in the plant growth cabinet. And using STFT transformation to analyze the plant electrical signal which collected by plant electrical signal acquisition system. The result shows that under the situation of other environment factors are constant, only changing the light condition, the electrical signal amplitude of swallow palm is 1400μV in light intensity of 12503 ~ 17230, and the electrical signal amplitude of anthurium is 944μV in light intensity of 17230~22307Lux. The result shows that the plant electrical signal would change with the change of light intensity, every kind of plant will obtain the biggest photosynthesis when in the most suitable light condition, at the same time, the electrical signal achieve the peak value.

Design of Dust Removal Device for Electric Meter

With the development of automation industry, more and more manufacture depends on automation to improve production efficiency. After welded the electric meter, it is necessary to clean up dust in the dial plate. At present, there have been some manufacturers began to design automatic dust removal equipment in order to improve the efficiency of the industry. Because of these reasons, it designed a set of meter dust removal device, the device used the SCM ATmega16 as the control core, through the selection of components, and hardware and software design, to achieve the automatic dust removing function for electric meter. After tested, the dust removal device runs stably and reliably, the result of dust removal is clean, so as to avoid polluting the air.

Design of Farmland Information Intelligent Collection Node Based on GPS

Timely and accurate acquisition of the farmland information is the foundation of the implementation of precision agriculture. Farmland information acquisition technology based on the GPS is an important means of precision agriculture information acquisition. According to the characteristics of field information collection, such as high density, high accuracy, low cost and so on, it designed intelligent farmland information acquisition node based on GPS. The node with the portable GPS positioning module, used the embedded processor STM32F103VC as the core, integrated the farmland information acquisition sensor, could acquire, process and transmit temperature and humidity in the field information, so as to realize to monitor the farmland information parameter in the long distance. After tested, the node works well and has achieved the design requirements.

Research of Circuit Board Fast-Scanning Detecting Device

Along with the development of electronic technology, it is more and more important to design a printed circuit board (PCB) and test it for electronic product. At first it analyzed the PCB auto-test system, and then designed the contact-type PCB detection system. It is mainly composed of a needle plate to fix the tested circuit board, power supply module, A/D conversion module, single-chip microcomputer (SCM), display module and the keyboard module. With the core of AVR SCM ATmega16, it transmitted the measured point voltage gathered by A/D conversion module to the SCM, and then displayed it by the displaying module. After tested, the device works well and meets the requirements.

Design of Test Equipment for Electronic Module Sampling Accuracy

Along with rapid development of the electronic, sensor and SCM technology, the market appeared more and more intelligent products; product performance is improving gradually, so the test requirements and approach aiming at product performance also need further improvement. Aiming at the electronic sampling module it designed a sampling accuracy testing device used to test the sampling accuracy. The testing device used ATmega16 single-chip microcomputer (SCM) as the control core, periphery is collocated with a corresponding signal acquisition circuit, the LED digital tube display circuit, relay control circuit and alarm circuit to complete electronic module sampling accuracy test. The results showed that, the device is convenient to use, and works well.

Design of Test Device for Double-Rate Counter

Along with rapid development of microelectronic technology and single-chip microcomputer technology, the market appears more and more electronic rate counter, the counting accuracy testing device also subsequently grow in quantity. Aiming at the double-rate counter, it designed a testing device used for double-rate counter accuracy test. The testing device used low-power microprocessor ATmega8 SCM(single-chip microcomputer) as the control core, collocated with a pulse output circuit, the LED digital tube display circuit and alarm circuit to implement count accuracy test together. After tested, the test device works well, and has the advantages of simple structure, convenient to use.