CN102944758A - Electromagnetic radiation signal monitoring device - Google Patents
Electromagnetic radiation signal monitoring device Download PDFInfo
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- CN102944758A CN102944758A CN2012105077443A CN201210507744A CN102944758A CN 102944758 A CN102944758 A CN 102944758A CN 2012105077443 A CN2012105077443 A CN 2012105077443A CN 201210507744 A CN201210507744 A CN 201210507744A CN 102944758 A CN102944758 A CN 102944758A
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Abstract
The invention discloses an electromagnetic radiation signal monitoring device which comprises a monitoring probe, an anti-interference protection circuit, an amplifying and filtering circuit, an optoelectronic isolation circuit and a computer, wherein the monitoring probe is used for sensing and monitoring electromagnetic radiation signals, and sensing electrical signals; the anti-interference protection circuit is used for preventing the peak pulse interference in the environment; the amplifying and filtering circuit is used for carrying out amplifying and filtering on the electrical signals; the optoelectronic isolation circuit is used for carrying out optoelectronic isolation on the electrical signals subjected to amplifying and filtering and then outputting signals so as to prevent that interference signals are introduced back to the amplifying and filtering circuit from the output end; and the computer comprises a signal acquisition card, a waveform display unit and a data storage unit, and the computer is used for carrying out acquisition, display, storage and analysis, calculation on the signals outputted by the optoelectronic isolation circuit. The electromagnetic radiation signal monitoring device disclosed by the invention has the advantages of simple structure, and strong anti-interference ability.
Description
Technical field
The present invention relates to the Techniques in Electromagnetic Measurement field, particularly a kind of ELECTROMAGNETIC RADIATION SIGNATURE monitoring device.
Background technology
Concrete uses in the structures such as bridge, dam in a large number, is subjected to the operating load effect, and xoncrete structure crackle can occur and follow the ELECTROMAGNETIC RADIATION SIGNATURE of the frequency of occurrences below 1MHz, monitors the integrality that this ELECTROMAGNETIC RADIATION SIGNATURE helps to monitor xoncrete structure.Because the concrete rupture ELECTROMAGNETIC RADIATION SIGNATURE is faint, monitoring system is subject to environment electromagnetics interference and impact normal operation, and the electromagnetic screen and the job stability that solve monitoring device are the major issues that needs solution.
" Chinese Journal of Rock Mechanics and Engineering " calendar year 2001 the 6th phase 797-800 page or leaf have a piece of writing " electromagnetic signal in the concrete compression rupture process " the article introduction in order to get rid of outside electromagnetic interference, laboratory sample and probe are placed in the electromagnetic shielding box, anti-interference and the isolating problem that this article is put before not introducing, and front interference of putting introducing is the unsettled key factor of system.
It is anti-interference that Research Institute of Geology, China Earthquake Administration in 2009 has a piece master thesis " experimental study of rock deformation and electromagnetic radiation " to adopt coil pickoff and prime amplifier are put into the way of screened room, and this paper is not introduced collecting device, two-stage amplifier is introduced the isolating problem that disturbs.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.For this reason, the object of the invention is to propose a kind of antijamming capability ELECTROMAGNETIC RADIATION SIGNATURE monitoring device strong, simple in structure that has.
ELECTROMAGNETIC RADIATION SIGNATURE monitoring device according to the embodiment of the invention comprises: monitoring probe is used for the induction monitoring ELECTROMAGNETIC RADIATION SIGNATURE, and induces electric signal; Anti-tampering holding circuit, described anti-tampering holding circuit is connected between described monitoring probe and the filtering and amplifying circuit, is used for preventing that the environment peak pulse from disturbing; Filtering and amplifying circuit, the input end of described filtering and amplifying circuit links to each other with described anti-tampering holding circuit, is used for described electric signal is amplified and filtering; Photoelectric isolating circuit, the input end of described photoelectric isolating circuit links to each other with the output terminal of described filtering and amplifying circuit, is used for amplifying and filtered electric signal carries out exporting after the photoelectricity isolation, prevents that undesired signal from drawing the large filtering circuit of playback from output terminal; Computing machine, described computing machine links to each other with the output terminal of described photoelectric isolating circuit, comprise data acquisition card, waveform display unit and data storage cell, described computing machine is used for that signal to described photoelectric isolating circuit output gathers, shows, storage and analytical calculation.
In one embodiment of the invention, link to each other by the shielding stube cable between described monitoring probe and the described anti-tampering holding circuit.
In one embodiment of the invention; described anti-tampering holding circuit comprises the first fast diode and the second fast diode; it is in parallel that described the first fast diode and described the second fast diode carry out according to positive and negative order, and be connected to the input end of described amplifying circuit.
In one embodiment of the invention, described filtering and amplifying circuit is multistage filtering and amplifying circuit.
In one embodiment of the invention, described data acquisition card has heavily triggering and pre-sampling functions, and the single dominant record size of data acquisition is not less than 1ms.
In one embodiment of the invention, also comprise: shielding box, wherein, described anti-tampering holding circuit, filtering and amplifying circuit, photoelectric isolating circuit are installed in the same shielding box; With a plurality of supplying cell groups, described supplying cell group is described filtering and amplifying circuit and photoelectric isolating circuit power supply, and wherein, two parts circuit is respectively with two groups of different described supplying cell group power supplies before and after the isolation of described photoelectric isolating circuit.
The designed ELECTROMAGNETIC RADIATION SIGNATURE monitoring device of the present invention is simple in structure, can effectively avoid neighbourhood noise on the impact of circuit stability, has than high s/n ratio the wide (100Hz ~ 1MHz) for example of applicable frequency range.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the structured flowchart of the ELECTROMAGNETIC RADIATION SIGNATURE monitoring device of the embodiment of the invention;
Fig. 2 is the circuit diagram of the amplifying circuit module of the embodiment of the invention;
Fig. 3 is the circuit diagram of the filter circuit module of the embodiment of the invention;
Fig. 4 is the circuit diagram of the photoelectric isolating circuit of the embodiment of the invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
The object of the present invention is to provide a kind of technology of concrete rupture ELECTROMAGNETIC RADIATION SIGNATURE monitoring.This device can detect faint concrete rupture ELECTROMAGNETIC RADIATION SIGNATURE, and shielding environment interference noise makes external interference not affect the monitoring system normal operation.
As shown in Figure 1, the present invention proposes a kind of ELECTROMAGNETIC RADIATION SIGNATURE monitoring device, comprising: monitoring probe 10, anti-tampering holding circuit 20, filtering and amplifying circuit 30, photoelectric isolating circuit 40 and computing machine 50.Particularly:
Need to prove, shield better the result for reaching, generally between monitoring probe 10 and the anti-tampering holding circuit 20 link to each other by shielding stube cable.Concrete, the shielding stube cable can adopt 2 core iron silk screen shielded cables, and the cable insulation layer material is tygon, 0.12 millimeter of core line diameter, two millimeters of screen layer diameters, the unit length wave impedance is about 70.887 ohm, long 1 meter of cable.
The input end of filtering and amplifying circuit 30 links to each other with the output terminal of anti-tampering holding circuit 20, is used for described electric signal is amplified and filtering.Filtering and amplifying circuit is multistage filtering and amplifying circuit in one embodiment of the invention.Fig. 2 and Fig. 3 show respectively concrete amplifying circuit and the embodiment of filtering circuit.Wherein, 2 grades of amplifying circuits that the amplifying circuit module adopts 2 AD797AR amplifiers to form, 50 times of first order enlargement factors, the second level is amplified 100 times, and design parameter is seen Fig. 2.U1, U2 are high linearity low noise operational amplifier A D797AR among Fig. 2, and R1 to R4 is the proportion resistor of two-stage in-phase proportion amplifying circuit, and C1 to C8 is the decoupling capacitor of U1, U2 power supply.Filter circuit module adopts 1 AD797AR amplifier to form second-order filter circuit, and design parameter is seen Fig. 3.U3 is high linearity low noise operational amplifier A D797AR among Fig. 3, and R5, R6, R7 are filter resistance, and C13, C14 are filter capacitor, and C9 to C12 is the decoupling capacitor of U3 power supply.
The input end of photoelectric isolating circuit 40 links to each other with the output terminal of filtering and amplifying circuit 30, is used for amplifying and filtered electric signal carries out exporting after the photoelectricity isolation, prevents that undesired signal from drawing the large filtering circuit of playback from output terminal.In one embodiment of the invention, photoelectric isolating circuit 40 shows such as Fig. 4, adopts 3 AD797AR amplifiers and 2 high linearity analog photoelectricity coupling mechanisms and some resistance, electric capacity, commutation diode, is formed by connecting by Fig. 4.U4, U5 are high linearity low noise operational amplifier A D797AR among the figure, and it and resistance R 8, R9, R10, R11, capacitor C 16, C17, diode D3, D4 form the optocoupler driving circuit.OC1, OC2 are high linearity analog photoelectricity coupling mechanism, are used for the electric signal of input is converted into light signal, through optically-coupled, convert electric signal output to again, prevent the interference that electric direct connection produces.U6 is AD797AR, and the circuit that it and R12, C30 consist of is converted into voltage signal with the current signal of photo-coupler output.C18 to C29 is the decoupling capacitor of U4, U5, U6 power supply.R13 and C31 consist of low-pass filter circuit.
In the above embodiment of the present invention, preferably, also comprise: shielding box 60 and a plurality of supplying cell group 70.Wherein, anti-tampering holding circuit 20, filtering and amplifying circuit 30, photoelectric isolating circuit 40 are installed in the same shielding box 60.A plurality of supplying cell groups 70 are filtering and amplifying circuit 30 and photoelectric isolating circuit 40 power supplies in the shielding box 60.Need to prove that two parts circuit is respectively with 70 power supplies of two groups of different supplying cell groups before and after the isolation of photoelectric isolating circuit 40.Namely, the amplifying circuit of Fig. 2,2 discharge circuits of the filtering circuit of Fig. 3 and Fig. 4 left side share one group of chargeable lithium cell group, the discharge circuit on Fig. 4 the right uses another group chargeable lithium cell group, can accomplish that like this photoelectric isolating circuit both sides power-supply system also is electrical isolation.
The designed ELECTROMAGNETIC RADIATION SIGNATURE monitoring device of the present invention is simple in structure, can effectively avoid neighbourhood noise on the impact of circuit stability, has than high s/n ratio the wide (100Hz ~ 1MHz) for example of applicable frequency range.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment in the situation that does not break away from principle of the present invention and aim within the scope of the invention, modification, replacement and modification.
Claims (6)
1. an ELECTROMAGNETIC RADIATION SIGNATURE monitoring device is characterized in that, comprising:
Monitoring probe is used for the induction monitoring ELECTROMAGNETIC RADIATION SIGNATURE, and induces electric signal;
Anti-tampering holding circuit, described anti-tampering holding circuit is connected between described monitoring probe and the filtering and amplifying circuit, is used for preventing that the environment peak pulse from disturbing;
Filtering and amplifying circuit, the input end of described filtering and amplifying circuit links to each other with described anti-tampering holding circuit, is used for described electric signal is amplified and filtering;
Photoelectric isolating circuit, the input end of described photoelectric isolating circuit links to each other with the output terminal of described filtering and amplifying circuit, is used for amplifying and filtered electric signal carries out exporting after the photoelectricity isolation, prevents that undesired signal from drawing the large filtering circuit of playback from output terminal;
Computing machine, described computing machine links to each other with the output terminal of described photoelectric isolating circuit, comprise data acquisition card, waveform display unit and data storage cell, described computing machine is used for that signal to described photoelectric isolating circuit output gathers, shows, storage and analytical calculation.
2. device as claimed in claim 1 is characterized in that: link to each other by the shielding stube cable between described monitoring probe and the described anti-tampering holding circuit.
3. such as claim 1 and 2 described devices; it is characterized in that: described anti-tampering holding circuit comprises the first fast diode and the second fast diode; it is in parallel that described the first fast diode and described the second fast diode carry out according to positive and negative order, and be connected to the input end of described amplifying circuit.
4. such as each described device of claim 1-3, it is characterized in that: described filtering and amplifying circuit is multistage filtering and amplifying circuit.
5. such as each described device of claim 1-5, it is characterized in that: described data acquisition card has heavily triggering and pre-sampling functions, and the single dominant record size of data acquisition is not less than 1ms.
6. device as claimed in claim 1 is characterized in that, also comprises:
Shielding box, wherein, described anti-tampering holding circuit, filtering and amplifying circuit, photoelectric isolating circuit are installed in the same shielding box; With
A plurality of supplying cell groups, described supplying cell group are described filtering and amplifying circuit and photoelectric isolating circuit power supply, and wherein, two parts circuit is respectively with two groups of different described supplying cell group power supplies before and after the isolation of described photoelectric isolating circuit.
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| CN201210507744.3A CN102944758B (en) | 2012-11-30 | 2012-11-30 | Electromagnetic radiation signal monitoring device |
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| CN201210507744.3A CN102944758B (en) | 2012-11-30 | 2012-11-30 | Electromagnetic radiation signal monitoring device |
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| CN102944758A true CN102944758A (en) | 2013-02-27 |
| CN102944758B CN102944758B (en) | 2015-01-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597416A (en) * | 2015-02-02 | 2015-05-06 | 成都星炫科技有限公司 | Environment electromagnetic radiation detection method |
| CN112485539A (en) * | 2020-11-18 | 2021-03-12 | 上海电力大学 | Electromagnetic environment monitoring device and monitoring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253335A (en) * | 2011-06-20 | 2011-11-23 | 褚宝祥 | Detection circuit used for turning off thyristor |
| CN102281113A (en) * | 2011-08-03 | 2011-12-14 | 京信通信系统（中国）有限公司 | Communication relay device and standing-wave ratio detection device and method thereof |
| CN202443072U (en) * | 2012-02-17 | 2012-09-19 | 山东格林检测有限公司 | Electromagnetic radiation monitoring device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253335A (en) * | 2011-06-20 | 2011-11-23 | 褚宝祥 | Detection circuit used for turning off thyristor |
| CN102281113A (en) * | 2011-08-03 | 2011-12-14 | 京信通信系统（中国）有限公司 | Communication relay device and standing-wave ratio detection device and method thereof |
| CN202443072U (en) * | 2012-02-17 | 2012-09-19 | 山东格林检测有限公司 | Electromagnetic radiation monitoring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597416A (en) * | 2015-02-02 | 2015-05-06 | 成都星炫科技有限公司 | Environment electromagnetic radiation detection method |
| CN112485539A (en) * | 2020-11-18 | 2021-03-12 | 上海电力大学 | Electromagnetic environment monitoring device and monitoring method |
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| CN102944758B (en) | 2015-01-14 |
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