CN107632217B

CN107632217B - Device for electromagnetic interference source detection and remote tracking

Info

Publication number: CN107632217B
Application number: CN201710782967.3A
Authority: CN
Inventors: 林先其; 王豹; 聂丽瑛; 许冬冬; 付毅; 张永鑫; 王曼婷; 杜国东
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2017-09-03
Filing date: 2017-09-03
Publication date: 2020-03-31
Anticipated expiration: 2037-09-03
Also published as: CN107632217A

Abstract

The invention discloses a device for electromagnetic interference source detection and long-distance tracking. Including electromagnetic interference source detection module and electromagnetic interference source tracking module. The electromagnetic interference source detection module receives the radio frequency signal in the surrounding space, and after detection and amplification, the threshold is judged to determine whether there is an electromagnetic interference signal and transmit a radio frequency signal of a specific frequency. The electromagnetic interference source tracking module determines the direction and position of the electromagnetic interference source according to the received radio frequency signal of a specific frequency. The invention provides an electromagnetic interference source detection and long-distance tracking device with simple design, easy implementation and strong practicability, which can accurately detect whether there is an electromagnetic interference source and perform long-distance tracking of the electromagnetic interference source.

Description

Device for electromagnetic interference source detection and remote tracking

Technical Field

The invention belongs to the technical field of wireless communication, and particularly relates to a device for electromagnetic interference source detection and remote tracking.

Background

With the rapid development of mobile communication technology, mobile communication equipment is not available in daily life, and serves as an important carrier for information interaction between the mobile communication equipment and the outside, and important functions such as communication, entertainment, leisure, emergency call and the like are undertaken, so that when the mobile communication equipment is interfered by an external strong electromagnetic interference source, the mobile communication equipment almost loses contact with the outside, and is probably in danger and cannot ask for help. At this time, a system which can still work normally after the portable mobile communication equipment is shielded, can detect the existence of electromagnetic interference signals and simultaneously transmit special electromagnetic signals to the outside, and enables the outside to determine the position of the portable mobile communication equipment according to the transmitted electromagnetic signals is urgently needed to ensure the personal safety of users.

Disclosure of Invention

The invention aims to provide a device capable of detecting electromagnetic interference signals and enabling the outside to track an electromagnetic interference source remotely when mobile communication equipment cannot work normally due to electromagnetic interference, and solves the problem that the mobile communication equipment cannot ask for help to the outside when being shielded and in danger.

The technical scheme of the invention is as follows: a device for detecting and remotely tracking an electromagnetic interference source comprises an electromagnetic interference source detection module and an electromagnetic interference source tracking module; the electromagnetic interference source detection module comprises a receiving antenna, a detector, an operational amplifier, a single chip microcomputer, an oscillation source, an amplifier and a transmitting antenna; the radiation direction of the receiving antenna is horizontal omnidirectional and is connected with a detector through a coaxial or microstrip line, the detector is connected with an operational amplifier through a metal wire, the operational amplifier is connected with a singlechip through a metal wire, the singlechip is connected with an oscillation source through a metal wire, the oscillation source is connected with an amplifier through a microstrip line or a coaxial line, the amplifier is connected with a transmitting antenna through a microstrip line or a coaxial line, and the radiation direction of the transmitting antenna is horizontal omnidirectional; the electromagnetic interference source tracking module comprises a receiving antenna, a low noise amplifier, a detector, an operational amplifier and a display; the radiation direction of the receiving antenna is high orientation and is connected with the low noise amplifier through a microstrip or a coaxial line, the low noise amplifier is connected with the detector through a metal wire, the detector is connected with the operational amplifier through a metal wire, and the operational amplifier is connected with the display through a metal wire.

The invention has the beneficial effects that: the design is simple and easy to realize; the radio frequency signal is converted into a direct current signal, so that the power consumption and the cost of the whole system are reduced, the tracking distance is increased, a display circuit can be simplified, and the whole system is portable; and electromagnetic interference source detection and remote tracking are realized.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

Detailed Description

In order to better explain the technical scheme of the invention in detail, the application is further described with reference to the attached drawings in the embodiment.

As shown in fig. 1, the receiving antenna 11 is a broadband monopole antenna, has a working frequency of 860MHz to 2.6GHz, covers a common mobile communication and satellite navigation frequency band, and receives radio frequency signals horizontally and omni-directionally to realize optimal reception of radio frequency signals in various directions; then transmitting the received signal to a detector 12, wherein the detector 12 is a broadband detector, and the working frequency band covers 860 MHz-2.6 GHz, so that the radio frequency signal is converted into a direct current signal; then, the output direct current signal is transmitted to an operational amplifier 13, so that the amplification of the direct current signal is realized; the amplified direct current signal is transmitted to the single chip microcomputer 14, a detection threshold is set through programming, judgment of the amplified direct current signal and a preset threshold is achieved, and whether an electromagnetic interference signal exists is detected; when no electromagnetic interference signal is detected, the singlechip 14 transmits an off signal to the oscillation source 15, and the oscillation source 15 does not work; when the interference signal is detected, the singlechip 14 transmits an on signal to the oscillation source 15, the oscillation source 15 works and outputs a 583MHz radio frequency signal which is not commonly used in mobile communication; the 583MHz radio frequency signal output by the oscillation source 15 is transmitted to the amplifier 16, and the amplifier 16 adopts a medium power radio frequency amplifier to amplify the 583MHz radio frequency signal; finally, transmitting the amplified 583MHz radio frequency signal to a transmitting antenna 17, wherein the transmitting antenna 17 is a narrow-band monopole antenna, and the working frequency range is 560 MHz-600 MHz, so that the transmission of the radio frequency signal with specific frequency is realized; the receiving antenna 21 is a high-gain narrow-band yagi antenna, the working frequency is 560 MHz-600 MHz, 583MHz radio frequency signals transmitted by the transmitting antenna 17 are received with high directionality, and the direction of the transmitting antenna 17 is distinguished by a tracking party; transmitting the received 583MHz radio frequency signal to the low noise amplifier 22 to realize the amplification of the 583MHz radio frequency signal; transmitting the amplified 583MHz radio frequency signal to the detector 23 to realize the conversion from the radio frequency signal to the direct current signal; the direct current signal is transmitted to an operational amplifier 24, so that the direct current signal is amplified; the amplified direct current signal is transmitted to a display 25, so that the distance of the transmitting antenna 17 is judged by a tracking party; and completing the tracking of the electromagnetic interference signal.

The foregoing description is only illustrative of the system framework and preferred embodiments of the invention and is not intended to limit the invention, which may be subject to numerous modifications and variations by those skilled in the art. Therefore, all modifications, alterations, improvements, etc. within the spirit and principle of the invention are within the scope of the invention.

Claims

1. A device for electromagnetic interference source detection and long-distance tracking, comprising an electromagnetic interference source detection module (1) and an electromagnetic interference source tracking module (2); it is characterized in that: the electromagnetic interference source detection module (1) ) comprising a first receiving antenna (11), a first detector (12), a first operational amplifier (13), a single-chip microcomputer (14), an oscillation source (15), a third amplifier (16) and a transmitting antenna (17); The radiation direction of the first receiving antenna (11) is horizontal omnidirectional, and is connected to the first detector (12) through a coaxial or microstrip line, and the first detector (12) is connected to the first operational amplifier (13) through a metal wire connection; the first operational amplifier (13) is connected with the single-chip microcomputer (14) through a metal wire, the single-chip microcomputer (14) is connected with an oscillation source (15) through a metal wire, and the oscillation source (15) is connected with the first The three amplifiers (16) are connected, the third amplifier (16) is connected to the transmitting antenna (17) through a microstrip line or a coaxial line, and the radiation direction of the transmitting antenna is horizontal omnidirectional; the electromagnetic interference source tracking module (2) It comprises a second receiving antenna (21), a fourth low-noise amplifier (22), a second detector (23), a second operational amplifier (24) and a display (25); the radiation direction of the second receiving antenna (21) is Highly directional, connected with a low-noise fourth amplifier (22) through microstrip or coaxial, the low-noise fourth amplifier (22) is connected with a second detector (23) through a metal wire, and the second detector (23) through a metal wire The wire is connected to the second operational amplifier (24), and the second operational amplifier (24) is connected to the display through a metal wire; the first receiving antenna (11) is an ultra-wideband horizontal omnidirectional antenna, covering existing mobile communications , satellite navigation working frequency band; the transmitting antenna (17) is a narrow-band horizontal omnidirectional antenna, which is used to transmit radio frequency signals of a specific frequency and automatically filter out radio frequency signals of other frequencies.

2 . The device for electromagnetic interference source detection and long-distance tracking according to claim 1 , wherein the second receiving antenna ( 21 ) is a narrow-band high-directional antenna for receiving specific frequencies. 3 . radio frequency signals, and automatically filter out radio frequency signals of other frequencies.