基于变速积分PID的电热锅炉温度控制系统设计与仿真(2)

Key words: water temperature control system; single-chip; gearshift integral PID

09-12-26 Hardware Design of Battery-Powered Fingerprint Locker Control System

XU Zhi-xiong (Guangzhou Research Institute of O-M-E Technology,

Guangzhou 510663, China)

Maoming University, Maoming 525000, China)

ZHANG Hang (College of Machinery and Electronic Engineering,

09-12-18 The Improvement of Leak Detection Machine Control System Based on the Touching Screen

Abstract: This paper introduces the hardware design of a new type ultralow-power consumption fingerprint locker control system.

Key words: ultralow-power consumption; MCU; fingerprint; hardware design

Abstract: This paper introduces the system structure and the work process of the leak detection machine. Through carrying on a detailed analyzing to the question which appears frequently in the original control system, for enhancing stability, accuracy and craft adjustment conveniences of the system, an exhaustive improvement program which is clear and feasible is given. The new control system is simple, stable and reliable, and it greatly improves the performance of the equipment.

Key words: leak detection machine; PLC; touching screen; man-machine contact surface

SONG Jia-wei1, XU Bo-qiang1, YE Lei2 (1.School of Electrical

Engineering, North China Electric Power University, Baoding 071003, China;2.Zheng zhou Electric Power Industry Bureau, Zhengzhou450000, China)

09-12-27 Fault Diagnosis for Broken Rotor Bar in Induction Motor Supplied by a Converter

Technology, Guangzhou 510430, China)

LIU Dong-xiang (Guangzhou Vocational College of Railway

09-12-20 Design of the Temperature Examining and Controlling System Based on CPLD/FPGA

Abstract: The temperature examining and controlling system has widely used in reality. This paper proposed a temperature examining and controlling plan based on the CPLD/FPGA chip, used the CPLD chip EPM7128SLC84-15 as the temperature examining and controlling system hardware composition, and emphatically introduced the modular design mentality that using the hardware description language VHDL programming. The system hardware electric circuit is simple, the performance is stable, and it can be used in the room temperature controls.

Key words: CPLD/FPGA; AD590; temperature control; modular design

Abstract: There are symmetrical frequency fault feature additional current signal arising in stator current when induction motor associates with broken rotor bar. According to this, motor current signature analysis developed classical online detection method of broken rotor bar fault. On engineering real progress, the convenient acquisition signal is the secondary current of cubicle switchboard, namely power supply current in induction motor variable frequency drive system. Therefore, to achieve online detection for broken rotor bars of frequency control motor, it is necessary to know that there is fault feature current information in power supply current or not. This paper analyses power supply current for the first time, derives that power supply current includes broken rotor bar fault feature information. Base on the conclusion, to achieve broken rotor bar fault diagnosis of frequency control motor using by method blending continuous subdivision Fourier transform and self-adaptive filter.

Key words: induction motor; broken rotor bar fault; fault diagnosis; variable frequency power supply; power supply current

YUAN Yu-peng, YANG Lin, LAI Mei-jiang (Guangdong University of Technology, Faculty of Materials and Energy, Guangzhou 510006, China)

09-12-22 Monitor System of Sheet Metal Hydroforming Based on Configuration Software

09-12-32 Study on Dielectric Parameter in Rubber Seedling Leaf

CHEN Wei, WENG Shao-jie, WANG Ling-ling, CHU Chun Hua, LIU Hong (College of Mechanical and Electrical Engineering,

Hainan University, Danzhou 571737, China)

Abstract: In order to efficiently distinguish the growth condition of the plant through the dielectric parameter examination, this