Li Shengduo

Research and Development of Management Platform for Precision Ecological Agriculture Based on the Internet of Things

In order to improve the management level of ecological agriculture, in this paper based on the electronic and sensing technology, network information and computer technology, software engineering, and automatic control technology, in-depth research and application have been done in the fields of wireless sensor network, intelligent real-time monitoring system, 3G network and further query system, etc. Finally a precision intelligent management system for modern ecological agriculture standard production is established. This system can realize water-saving irrigation, balanced fertilization, crop pest and disease control for the ecological agriculture and actually enhance the economic benefits for ecological agriculture.

Design of Liquid Level Control System Based on PLC

Along with the development of industrial automation, liquid level control system has been widely used. In this paper, based on PLC a control system is established by PID algorithm and this control system can adjust liquid level automatically. PLC obtains liquid height through sensing circuit and determines the PID parameters through automatic adjustment mode. Then PLC controls liquid level by controlling working hours of DC pump. This system meets perfectly the demand of liquid level control system in industry, and it brings convenient and accurate for controlling.

A Zero Standby Power Remote Control System

The transmitter in a zero standby power remote control system for household appliances has been designed and verified. The chip in transmitting unit is fabricated in 0.18um CMOS technology and occupies a core area of 0.47mm2. It works around 915MHz and has a max output power of 0dBm. The total working power consumption of the chip is 16.45mW. The energy recoveries blocks and ASK demodulation block in the receiving unit are verified. This remote control system is proposed to overcome the continuous power consumption by watching circuits in other two methods. Compared with those two, this new remote control system can remote control appliances turning on/off with zero standby power.

A Water-Saving Irrigation Monitoring System Based on Wireless Data Acquisition Network

In this paper, a wireless data acquisition network was designed and implemented to water-saving irrigation monitoring. Low cost, reliability and portability were three main goals of this design. All the system units were designed and implemented by author. In the system, Basic unit (PU), sensor and valve cost under 100

The Development of PLC Innovative Experimental Platform and Study on Experimental Teaching

, 200

Bluff body valve-less piezoelectric pump

and 210

Remotely -controlled fishing boat

, respectively. ValCon was developed by authors to monitor and save soil moisture data with date and time. Thus growers would know the irrigated places and accordingly would make decision for irrigation period to reach desired irrigation level.

Embedded PLC industrial control plate based on STC single-chip microcomputer

At first, in this paper the necessity of the PLC experimental teaching model transformation and integrating were analyzed, a set of PLC innovative experimental platform was developed by the use of the teaching models and by combining with network technology and configuration technology. A complete system overcomes lack of flexibility of many experimental equipment from the current some experimental equipment manufacturers, and increases students’ initiative.It does a specific purpose.