the Method of Frequency Measurement Based on TMS320F2812 Event Manager;

Introduction to a Pretreatment Circuit for Frequency Measurement of Residual Voltage Signals for Speed Governor of Hydro Turbine;

The frequency measurement principle and operation process were introduced in detail;the real operation shown that the new speed relay is qualified for the power station requirement.

Design of a frequency measuring system for vibrating-wire sensor;

Based on conventional confining pressure regulating experience, specific measuring converting circuit and frequency measuring interface are designed for LP05C reciprocati.

In order to improve the reliability and behavior indexes of turbine genernor and to satisfy the automatic level of power station and people’s aesthetic requirements,research of some problems was performed,including measuring frequency of turbine PLC governor,human machine interface,sampling period,communication,failure treatment,parameters setting,electric power supply,etc.

In order to meet the requirement of vibrating wire sensor s data acquisition in large scale structural safety monitoring,a practical method was presented,which can be used to equal accurate measuring frequency.

The system combines the big competence of processing information of scillograph and the high precision of frequency measurement.

This paper intends to introduce a method of frequency test of various circuits of type 8031 SCP and its application in the comprehensive figure display instrument of tower cranes.