CN105629226A - Novel and high-efficiency explosion-proof device for electronic explosive - Google Patents

Abstract

The invention discloses a novel and high-efficiency explosion-proof device for an electronic explosive, which comprises a sensing module, a signal frequency processor, a signal transmitter, a frequency conversion module and a signal processing module, wherein the sensing module is used for recognizing signals of the explosive and transmitting information; the signal frequency processor processes the signals into a proper frequency; the signal transmitter amplifies the signals to a proper range, and next-step transmission is facilitated; the frequency conversion module processes the signals into a proper frequency through a signal frequency control algorithm to prepare for next-step processing; and the signal processing module samples the obtained signals for target detection and needed parameter extraction. The invention mainly aims at building a target nonlinear model, a frequency modulation continuous wave radar system is used for detecting the signals generated by the specific structure of the electronic explosive, and new features of the modern explosive can be met. The above realization mode is quick necessary.

Description

A kind of new and effective antiriot device for electronic explosive thing

Technical field

The present invention relates to a kind of systems design area, relate to a kind of by adopting efficient hardware circuit and chip to realize the antiriot device for electronic explosive thing with frequency processing.

Background technology

Traditional antiriot device function singleness on the market, the explosion-proof detector technology of use is scanning imagery Detection Techniques or nuclear energy Detection Techniques and supersonic sounding technology mostly. These technology are the technology of Introduced From Abroad mostly, and these technology are simply applied to the chemical analysis of explosive detection and identify explosive, it is impossible to identify the liquid explosives of the time break device made with electrical principles. The detection of fried thing. Being typically all the explosive of having electronic timing means according to contemporary most popular explosive, and it is carried out the detection of electronic installation, the detector of this device has relative to other detector that volume is little, cost is low, use and carry features such as all facilitating.

The main purpose of the present invention is the information state by detecting electronic explosive thing, special construction for electrical type, electronics knot being carried out acquisition of signal, thus making up the deficiency of detection electronic explosive thing, and removing to realize the high-efficiency operation of anti-riot function by efficient chip structure. Therefore, it can be said that by this be achieved in that necessary.

Summary of the invention

In view of this, the technical problem to be solved in the present invention is to provide a kind of operation by using the process equipment of chip that various performance is high and signal to realize antiriot device, for the problem solving electronic explosive thing.

For reaching the effect of technique scheme, the technical scheme is that

Induction module, for the front end of antiriot device, adopts the signal of pulse many systems harmonic radar, for collecting the signal of electronic explosive thing, the signal collected sends described signal frequency processor to;

Signal frequency processor, becomes second harmonic by the signal collected via PPT algorithm process, for the continuous signal read is passed to described signal projector;

Signal projector, adopt feedforward linearized technology, it is divided into two loops, first ring is signal cancellation ring, second ring is called condoning ring, enter main power amplifier, due to its non-linear distortion, outfan is except there is a need to the dominant frequency signal amplified, also has second harmonic interference, from the output rear portion signal of main power amplifier through the attenuator amplitude of accommodation, and with the input Signal averaging of another road time delay, main carrier frequency signal is made to be completely counterbalanced by, only remaining anti-phase second harmonic component, second harmonic component exports Signal averaging with the main power amplifier of time delay in another delay line after booster amplifier amplifies, offset the second harmonic of main power amplifier, thus obtaining the linear signal that amplifies to carry out next step transmitting,

Frequency-variable module, by the control algolithm to signal frequency, processes the signal into the process in order to next step of the suitable frequency;

Signal receiving module, the method is similar to super-heterodyne architecture, use multiple intermediater-frequency stage, first intermediate frequency is in high frequency, uses intrinsic local oscillator that whole radio spectrums are converted to a high intermediate frequency, and frequency is outside application band, radio-frequency filter after the antenna also serves as image-rejection filters and uses, down-conversion signal is by, after low pass filter, applying one and can realize the comprehensive frequency mixer that Image interference actively suppresses, required signal is down-converted to DC;

Signal processing module, the signal sampling that will obtain, carry out the extraction of target detection and desired parameters.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of new and effective antiriot device for electronic explosive thing of the present invention.

Detailed description of the invention

In order to make the technical problem to be solved, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention will be described in detail. It should be noted that, specific embodiment described herein is only in order to explain the present invention, being not intended to limit the present invention, the product that can realize said function belongs to equivalent replacement and improves, and is all contained within protection scope of the present invention. Concrete grammar is as follows:

Embodiment one:

As shown in Figure 1: embodiment one is according to embodiments of the present invention, it is provided that a kind of novel alarm with identification, this invention is suitable for all occasions such as family, company, station, including:

Induction module, for the front end of antiriot device, adopts pulse many systems harmonic radar, for collecting the signal of electronic explosive thing, the signal collected sends described signal frequency processor to;

Signal frequency processor, signal projector, adopt the signal that linear frequency modulation continuous wave is launched as transmitter, launch the radiofrequency signal of frequency centered by f, after detecting the second harmonic scatrering of PN junction, the signal that reception antenna receives is 2 times of emission signal frequency, the input power of power amplifier from 1dB compression point rollback 5-l0dB backward, it is operated on the level much smaller than 1dB compression point, now power amplifier is away from saturation region, enter into linear zone, when input power is much smaller than 1dB compression point, the harmonic constant produced improves, the linear of amplifier is improved by reducing the method for input power, this is a kind of effective ways improving linearity of amplifier characteristic,

Frequency-variable module, by the control algolithm to signal frequency, for instance two specific frequencies are added and subtracted mutually, processes the signal into the process in order to next step of the suitable frequency;

Signal processing module, then first carries out down-converted by the echo signal received, is down-converted to intermediate frequency by radiofrequency signal, and receiver is delivered to after this intermediate-freuqncy signal is sampled in signal processor and carried out target detection and parameter extraction;

The method that the present embodiment provides, it is possible to by the method for sweetly disposition frequency, the frequency of signal is suitably compressed, according to present case to the suitable computing of frequency, the result obtained provides the input for antiriot device, can meet in time judgement beneficial effect.

Embodiment two:

RF local oscillator is identical with the frequency of useful RF channel, that is, the lF frequency of this receiver is zero, the IF signal of this receiver is from direct current in other words " IF-FRE is zero; be absent from Image interference problem; amplify and filtering just can realize at direct current place; and only need at direct current place relatively low power consumption to be obtained with and occuring frequently identical gain compared with senior middle school; Channel assignment carries out at low frequency; have only to use low-frequency filter, the resistance capacitance on sheet can be used to realize filtering, and need not an additional both expensive huge SAW filter (SAW). Wave filter is placed on base band and can also realize the filtering of many bandwidth when not increasing circuit plate area, because filtering completes in sheet, in ideal conditions; zero intermediate frequency reciver seems flawless; namely change some traditional structures of sender; realize the integrated in the integrated frequency receiver penetrated of channel, zero intermediate frequency mode is very crucial in multimode rake receiver designs thus, and " imagination eliminating sheet external component has promoted drawing of zero intermediate frequency reciver architecture. Zero intermediate frequency reciver or homodyne radio receiver, be a kind of special superhet.

In this topological structure, whole radio spectrums are down-converted to DC, height roll-offs low pass filter for using outside high Q image rejection filter after realizing this topological structure of Channel assignment, and " RF preselection filter used is intended merely to and out of band signal is suppressed; " this makes down coversion directly produce I and Q signal to improve LNA dynamic range, to eliminate sheet external component making this architecture more integration " owing to only one of which local oscillator is for down-conversion signal; so decreasing Frequency mixing processing " in a word, this architecture is saving cost, reduces area and power consumption aspect is splendid. Zero intermediate frequency reciver even in some aspects can the superheterodyne receiver of beyond tradition " it does not contain SAW filter; signal can be made to be distorted " in addition because of its group delay, owing to zero intermediate frequency reciver does not have intermediater-frequency stage, therefore do not deposit and make its problem covering very bandwidth signals frequency range " main limiting factor is the bandwidth of preselection filter and RF amplification stage; and the tuning range of local oscillator " having grasped this point, zero intermediate frequency just can be easy to cover multiple frequency band.

The invention has the beneficial effects as follows, the formation basic theory of research PN junction and C-V characteristic, and the harmonic radiation for Nonlinear Parameter establishes physical model, and the power etc. of harmonic radiation has been carried out detailed mathematical derivation, according to the physical model set up, set up the radar equation of harmonic radar, and radar cross section and maximum radar range have been done detailed analysis. The present invention can not only to the detection of electronic timing device; concealed pick-up head and tapping device can also be detected; " this makes it be provided with civilian value, so that the application of the present invention expands on civil area, " its volume is little to protect the right of people's individual privacy! Easy to carry! The feature such as understandable simple to operate, strengthens again its popularization.

Claims (1)

1. a new and effective antiriot device for electronic explosive thing, it is characterised in that:

Induction module, for the front end of antiriot device, adopts the signal of pulse many systems harmonic radar, for collecting the signal of electronic explosive thing, the signal collected sends described signal frequency processor to;

Signal frequency processor, becomes second harmonic by the signal collected via PPT algorithm process, for the continuous signal read is passed to described signal projector;

Signal projector, adopt feedforward linearized technology, it is divided into two loops, first ring is signal cancellation ring, second ring is called condoning ring, enter main power amplifier, due to its non-linear distortion, outfan is except there is a need to the dominant frequency signal amplified, also has second harmonic interference, from the output rear portion signal of main power amplifier through the attenuator amplitude of accommodation, and with the input Signal averaging of another road time delay, main carrier frequency signal is made to be completely counterbalanced by, only remaining anti-phase second harmonic component, second harmonic component exports signal after booster amplifier amplifies and superposes in misfortune clutch with the main power amplifier of time delay in another delay line, offset the second harmonic of main power amplifier, thus obtaining the linear signal that amplifies to carry out next step transmitting,

Frequency-variable module, by the control algolithm to signal frequency, processes the signal into the process in order to next step of the suitable frequency;

Signal receiving module, the method is similar to super-heterodyne architecture, use multiple intermediater-frequency stage, first intermediate frequency is in high frequency, uses intrinsic local oscillator that whole radio spectrums are converted to a high intermediate frequency, and frequency is outside application band, radio-frequency filter after the antenna also serves as image-rejection filters and uses, down-conversion signal is by, after low pass filter, applying one and can realize the comprehensive frequency mixer that Image interference actively suppresses, required signal is down-converted to DC;

Signal processing module, the signal sampling that will obtain, carry out the extraction of target detection and desired parameters.