The Synthesis Technology And Application Research Of Pseudo-random And Broad-spectrum Complex-frequency Signals

Along with the development of technology, pseudo-random and broad-spectrum complex-frequency signals is getting more and more application. The pseudo-random multi-frequency signal containing several kinds of frequency signals, it has the characteristics of a random waveform and can be reproduced,then bandwidth can be controlled. Its energy concentrated in a few equidistant distribution frequency on logarithmic coordinates.The signal used widely in radio measurement,geophysical electrical prospecting, machinery online fault detection, building quality inspection and other aspects.Considering the increasingly serious rodent problem in agricultural production and food reserves. This paper presents a compound with broad-spectrum pseudo-random frequency current signal, through the electromagnetic radiation generated Pseudo-random non-directional rotating electromagnetic field. And develop a set of extremely low frequency electromagnetic field radiation control system, that is applicable of large and medium-sized grain depot to expel and eradicate rodents. It could avoid the environment pollution and the negative impact to other organisms that traditional rodents control method bring on.In the study of pseudo-random multi-frequency signal,based on characteristic of pseudo-random multi-frequency signal, the expression of pseudo-random multi-frequency signal in time domain and frequency domain is found. By comparing the spectrum and power distribution of pseudo-random multi-frequency signal and square wave, the advantage of pseudo-random multi-frequency signal as high work productivity, high power supply utilization ratio. It is a good solution to energy imbalance, phase synchronization when sending composite frequency pluse. It's a ideal wavefonn for many application.Combination the measured data of biological experiment and epidemiological investigation, the pseudo-random astatic rotary electromagnetic field expelling and eradicating rodents based on Integration Technology of Broad-spectrum of pseudo-random multi-frequency signal presented in detail.Finally, debugging the whole system. The experiments shows the synthesis signal arrive at good results. The radiation also generated the demanded electromagnetic field. The entire system has been carried out in practical applications, the technology has a wide application prospect, it is worth further study.