A new method of measuring gas flow in heavy or medium pipe based on the ionization effect of gas irradi ated with rays is presented. The mesurement principle of the flowmeter has been theoretically analyzed,the struct...A new method of measuring gas flow in heavy or medium pipe based on the ionization effect of gas irradi ated with rays is presented. The mesurement principle of the flowmeter has been theoretically analyzed,the structure form and the base of relevant parameter’s choice of the flowmeter have been given, and theintellectual instrument is developed. The results of experiment show that the per formance of the flowmeter is stable, the precision can reach 1 to 1. 5 percent, and it has fairly capability to resist disturbance and pollution.展开更多
Traditional signal processing methods for turbine flowmeter are unable to solve the contradiction between the real-time performance and the accuracy during the aeroengine bench test or hardware in the loop(HIL)simulat...Traditional signal processing methods for turbine flowmeter are unable to solve the contradiction between the real-time performance and the accuracy during the aeroengine bench test or hardware in the loop(HIL)simulation of aeroengine control system.A dynamic flow measurement method based on cycle number of the flowmeter is proposed.And a DSP-based multi-functional dynamic signal processing module for turbine flowmeter is built to validate the method.The developed system can provide three types of output modes including PWM,frequency and D/A.At the same time,the results can be displayed instantly with the module of serial communication interface to obtain dynamic flow signal with good precision.Experimental results show that the stability of flow measurement is greatly improved with precision guaranteed and the real-time response reaches the maximum limit of turbine flowmeter.展开更多
文摘A new method of measuring gas flow in heavy or medium pipe based on the ionization effect of gas irradi ated with rays is presented. The mesurement principle of the flowmeter has been theoretically analyzed,the structure form and the base of relevant parameter’s choice of the flowmeter have been given, and theintellectual instrument is developed. The results of experiment show that the per formance of the flowmeter is stable, the precision can reach 1 to 1. 5 percent, and it has fairly capability to resist disturbance and pollution.
文摘Traditional signal processing methods for turbine flowmeter are unable to solve the contradiction between the real-time performance and the accuracy during the aeroengine bench test or hardware in the loop(HIL)simulation of aeroengine control system.A dynamic flow measurement method based on cycle number of the flowmeter is proposed.And a DSP-based multi-functional dynamic signal processing module for turbine flowmeter is built to validate the method.The developed system can provide three types of output modes including PWM,frequency and D/A.At the same time,the results can be displayed instantly with the module of serial communication interface to obtain dynamic flow signal with good precision.Experimental results show that the stability of flow measurement is greatly improved with precision guaranteed and the real-time response reaches the maximum limit of turbine flowmeter.
