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ABSTRACT: The spectral analysis is combined with digital filter to process the vortex sensor signal for reducing the effect of disturbance at low frequency from pipe vibrations and increasing the turndown ratio. Using digital signal processing chip, two kinds of digital signal processing systems are developed to implement these algorithms. One is an integrative system, and the other is a separated system. A limiting amplifier is designed in the input analog condition circuit to adapt large amplitude variation of sensor signal. Some technique measures are taken to improve the accuracy of the output pulse, speed up the response time of the meter, and reduce the fluctuation of the output signal. The experimental results demonstrate the validity of the digital signal processing systems.
The Review of scientific instruments 03/2009; 80(2):025104. · 1.52 Impact Factor
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ABSTRACT: A power-spectrum-analysis-based signal processing system was developed for vortex flowmeters. This system consists of a digital signal processor (DSP), an analog input part, an output part, a keyboard input circuit, a guard circuit, a serial communication interface, and software. The sensor output signals are processed digitally using the power spectrum analysis based on fast Fourier transform, and the signal frequency reflecting the flow rate is calculated. With the change of sampling frequency and the spectrum correction, the measurement accuracy of the system is improved and the volumetric flow rate is obtained accurately. By means of adopting a DSP and processing signals while sampling data, the signal processing in real time is ensured. The experiments, including tests of the charge amplifier and signal processing system, and calibration of the vortex flowmeter, show that the performance indexes of the digital processing system are better than those of the conventional instruments for vortex flowmeters in the measurement accuracy, the turn-down ratio, and the adaptability
IEEE Transactions on Instrumentation and Measurement 07/2006; · 1.21 Impact Factor
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ABSTRACT: This paper focuses on the position control and contour error of a motion control system. A test-bed of the control algorithms based on DSP is developed. In order to analyze and simulate the test-bed, many algorithms such as the conventional PID algorithm, fuzzy adaptive PID algorithm, ANN PID algorithm and fuzzy neural network control algorithm, are adopted. A valuable research for the real-time object control and system performance evaluation was carried out.
Machine Learning and Cybernetics, 2002. Proceedings. 2002 International Conference on; 02/2002
