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Because of the wireless remote monitoring system has more and more application, a remote monitoring system based on GPRS and internet is presented. Based on the total design of the system, the hardware and software of the system is designed. The design method is suitable for any remote monitoring and control system if the sensors and conditioning circuits are replaced. So there is certain reference...
For the sake of attenuating dead-band nonlinearity in digital closed-loop fiber-optic current transformers (FOCT), a signal processing model based on stochastic resonance effect (SRE) was proposed based on theoretic analysis. A zero-averaged stochastic noise with normal probability distribution function and adaptable bandwidth was produced by operating thermal noise from a resistor as noise source...
An extreme simple method for digital FIR filter design is introduced. A series of filter formulas are obtained. In comparison with existed methods the method is the simplest except rectangular window method. Filter transition bandwidth is smaller than 4.65π/N for filter order N. For the same filter specifications filter order obtained by using the new method is much smaller than by using Kaiser window...
The paper chooses the penetration impact signal as the research object. The matched filtering algorithm has been used to process the impact signal according to its frequency. On the analysis of the correlation algorithm and radix-4 FFT algorithm, the paper puts forward an implementation algorithm on FPGA of the fixed geometric structure addressing. By using fixed geometry addressing, pipeline design...
A method of implementing 256-point, high-speed and 16-bit complex FFT is presented on the radix-4 FFT algorithm. By using a fixed geometry addressing, pipeline designing and block floating point structure, the data has the greater precision and dynamic range. The results show that the design is efficient, strongly extensive and occupies less resource. It is a good method to meet the high-speed digital...
On the basis of the research on the penetration acceleration signal, the composition and frequency characteristic of the acceleration signal are proposed. Through the projectile hammering test, the penetrating projectile response signal is achieved and conducted with spectrum analysis to obtain the natural frequency of the projectile then comparing with the calculated natural frequency. Finally, the...
Penetration acceleration signal is a kind of non-stationary random signal, the occurrence of which lasting a very short period of time, and the conventional time-frequency analysis and non-parametric modeling methods cannot effectively analyze and deal with such signals. In this paper, wavelet analysis theory is used to achieve the accurate analysis of the non-stationary random penetration signal,...
Penetration acceleration signal acquired by acceleration sensor in the process of hard target penetration is a kind of non-stationary random signal, the occurrence of which lasting a very short period of time, and the conventional time-frequency analysis and non-parametric modeling methods cannot effectively analyze and deal with such signals. In this paper, Gabor transform is used to achieve the...
Penetration acceleration signal is a kind of non-stationary random signal, the occurrence of which lasting a very short period of time, and the conventional time-frequency analysis and non-parametric modeling methods can not effectively analyze and deal with such signals. In this paper, time-varying autoregressive (TVAR) algorithm is used to achieve the parametric modeling of the non-stationary random...
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