CN1607393A - Electromagnetic field sensing element and its apparatus - Google Patents
Electromagnetic field sensing element and its apparatus Download PDFInfo
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- CN1607393A CN1607393A CN 200310101350 CN200310101350A CN1607393A CN 1607393 A CN1607393 A CN 1607393A CN 200310101350 CN200310101350 CN 200310101350 CN 200310101350 A CN200310101350 A CN 200310101350A CN 1607393 A CN1607393 A CN 1607393A
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- electromagnetic field
- photoswitch
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Abstract
This invention discloses a magnetic field sensing element and its device containing a light modulator altering light wave amplitude transferred by it according to an applied electric field strength, an electromagnetic field sensing element converting the sensed magnetic filed signal to electric signal and applying a corresponding electric field strength on said light modulator, a light source for generating light waves, a first fiber transferring the wave generated by the light source to said light modulator, a light detector converting a light input signal into an electric signal and a second fiber transferring light wave output by said modulator to said light detector.
Description
Technical field
The invention relates to a kind of electromagnetic field sensing element and device thereof, particularly can measure the electric field signal of electromagnetic field to be measured and the sensing element and the device thereof of field signal simultaneously about a kind of.
Background technology
Traditional electromagnetic field sensing apparatus (as antenna) is to use the cable transmission signals.Yet because cable itself is a conductor, therefore electromagnetic field to be measured can be disturbed by the cable of transmission signals.In order to solve this interference problem, thereby the exploitation of so-called photo-electric electric field sensing device is arranged.
Photo-electric electric field sensing device generally is to use Nd:YAG laser to work as light source, and uses lithium niobate (LiNbO
3) crystal is base material, and on lithium columbate crystal the growth optical waveguide with form interference signal (with reference to IEEE Transactions on electromagnetic compatibility, vol.34, No.4,1992, pp.391-396).Japanese in addition Tokin company has also delivered the patent of piece correlation technique surplus in the of ten, its content comprises mainly that the photomodulator in the electric field sensing device designs and produces and carries out (referenced patent EP0664460B1 such as temperature compensation with optical fiber, EP0668506A1, EP0668507A1 etc.).But these papers and patent all only are at the electric field sensing device, and the magnetic field sensing apparatus is not discussed fully.
Fig. 1 is existing photo-electric electric field sensing schematic representation of apparatus.As shown in Figure 1, existing photo-electric electric field sensing device 10 is to detect electric field signal in the electromagnetic field to be measured by an electric field antenna 12.The output terminal of this electric field antenna 12 is linked to a photomodulator 14, and this photomodulator 14 comprises a smooth input waveguide 16, two light phase modulation waveguides 18 and an optical output waveguide 20.This photomodulator 14 is to use a lithium columbate crystal, and respectively there is an electrode 24,26 light phase modulation waveguide 18 tops.
The semiconductor laser light wave that sends from light source enters light phase modulation waveguide 18 from first optical fiber, 22 lead-in light input waveguides 16 and beam split, remerges optical output waveguide 20.When electrode 24 and 26 at electrode have voltage difference, then cause the refraction index changing of light phase modulation waveguide 18, the phase position Hair of the laser light wave of the feasible two light phase modulation waveguides 18 of passing through gives birth to and changes (promptly changing the phase differential of Two road laser), so the output intensity of the interference light of optical output waveguide 20 will change with the potential difference (PD) of 24,26 at electrode.When antenna 12 receives electric field signal, its output electric field signal is with the intensity of the output laser of light modulated output waveguide 20, therefore electric field signal promptly is convertible into light signal on photomodulator 14, be sent to photodetector 30 via second optical fiber 28 again, and do not need to connect with cable, can solve interference problem.
Yet because the electric field signal of electric field measurement can not be represented the whole electromagnetic field under Jin Yi Strip spare, therefore measuring Jin Yi Time must further measure magnetic field by a magnetic field sensing apparatus.Moreover this photo-electric electric field sensing device can produce zero point drift because of the temperature variation of environment.Though can overcome drifting problem via the temperature of feedback control electric field sensing device again and use lead to connect temperature-sensing device, but lead also can influence electromagnetic field to be measured, therefore be necessary to develop a kind of compensation technique of not having lead.
Summary of the invention
Fundamental purpose of the present invention provides electromagnetic field sensing element and device thereof, and it can measure the electric field signal and the field signal of electromagnetic field to be measured.
In order to achieve the above object, the present invention discloses electromagnetic field sensing element and device thereof.This device comprises one can be according to the photomodulator of an electric field intensity change that applies through the light wave amplitude of its transmission, one electromagnetic field signal with sensing is converted to electric field signal and applies the electromagnetic field sensing element of the electric field intensity of a correspondence in this photomodulator, one is used to produce the light source of light wave, one light wave with this light source generation is sent to first optical fiber of this photomodulator, one converts a light input signal photodetector of an electric signal to, reach second optical fiber that a light wave with this photomodulator output is sent to this photodetector.
This electromagnetic field sensing element comprises the privates section that second conducting line segment that second photoswitch that first photoswitch, that one first conducting line segment, is arranged at this first conducting line segment end is arranged at this another end of first conducting line segment, is connected with this first conducting line segment via first photoswitch, is connected with this first conducting line segment via second photoswitch.When this first photoswitch and this second photoswitch conducting, but promptly form the tours antenna in a sensing magnetic field, and when this first photoswitch and this not conducting of second photoswitch, but promptly form the linear antenna of a sensing electric field.
Compared with prior art, because the present invention uses the electromagnetic field sensing element by photoswitch control, therefore can measure the electric field signal and the field signal of electromagnetic field to be measured by single electromagnetic field sensing element.
Description of drawings
The present invention will illustrate according to accompanying drawing, wherein:
Fig. 1 is existing photo-electric electric field sensing schematic representation of apparatus;
Fig. 2 is the synoptic diagram of photo-electric electromagnetic field sensing apparatus of the present invention;
Fig. 3 is the sectional view of photomodulator of the present invention;
Fig. 4 is the synoptic diagram of electromagnetic field sensing element of the present invention.
Component symbol explanation among the figure:
40 optical profile type electromagnetic field sensing apparatus
50 photomodulators
51 smooth input waveguides
52 light phase modulation waveguides
53 optical output waveguides
54,55,56 electrodes
70 electromagnetic field sensing elements
71 first conducting line segments
72 second conducting line segments
73 privates sections
74 first photoswitches
75 second photoswitches
76,77 optical fiber
80 semiconductor laser light resources
82 first optical fiber
84 photodetectors
86 second optical fiber
88 optical maser wavelength controllers
90 substrates
Embodiment
Fig. 2 is the synoptic diagram of optical profile type electromagnetic field sensing apparatus 40 of the present invention.As shown in Figure 2, optical profile type electromagnetic field sensing apparatus 40 of the present invention comprises a photomodulator 50, an electromagnetic field sensing element 70, semiconductor LASER Light Source 80, one first optical fiber 82, a photodetector 84 and one second optical fiber 86.This photomodulator 50 can change light wave amplitude through its transmission according to the electric field intensity that applies, and the electromagnetic field signal that this electromagnetic field sensing element 70 is used for sensing is converted to electric field signal, and the electric field intensity that applies a correspondence is in photomodulator 50.This semiconductor laser light resource 80 is to be used to produce the laser light wave, and this first optical fiber 82 is to be used for the laser light wave that semiconductor laser light resource 80 produces is sent to photomodulator 50.This photodetector 84 is used for converting a light input signal to an electric signal, and this second optical fiber 86 is used for the light wave of photomodulator 50 outputs is sent to photodetector 84.In addition, this photomodulator 50 comprises a smooth input waveguide 51, two light phase modulation waveguides 52 and an optical output waveguide 53.
Electromagnetic field sensing element 70 comprises the privates section 73 that second conducting line segment 72 that second photoswitch 75 that first photoswitch 74, that one first conducting line segment 71, is arranged at these first conducting line segment, 71 ends is arranged at first conducting line segment, 71 another ends, is connected with first conducting line segment 71 via first photoswitch 74, is connected with first conducting line segment 71 via second photoswitch 75.When first photoswitch 74 and 75 conductings of second photoswitch, by first conducting line segment 71, but second conducting line segment 72 and the privates section 74 common tours antennas that form a sensing field signal, and when first photoswitch 74 and the 75 not conductings of second photoswitch, but second conducting line segment 72 and privates section 74 promptly form the linear antenna of a sensing electric field signal.Optical fiber the 76, the 77th is used to transmit the switching signal of controlling first photoswitch 74 and second photoswitch 75.
Fig. 3 is the sectional view of photomodulator along the A-A line.As shown in Figure 3, respectively there is an electrode 54,55 light phase modulation waveguide 52 tops, and an electrode 56 is arranged between the electrode 54,55.This electrode the 54, the 55th is electrically connected to an output terminal of electric field sensing element 50, and electrode 56 then is electrically connected to another output terminal.Sense the signal of electromagnetic field to be measured when electromagnetic field sensing element 70 after, be about to electromagnetic field signal to be measured and convert an electric field signal to, and between electrode 54,55 and 56, apply a pair of electric field intensity that should electric field signal.In the enforcement, because the cutting mode of electro-optic crystal may be different, so the arrangement mode of electrode may be different from that shown in Figure 3.Only, the function of these electrodes all is to this light phase modulation waveguide 52 in order to the sensing signal that transmits this electromagnetic field sensing component 70.
The semiconductor laser light wave that sends from semiconductor laser light resource 80 enters light phase modulation waveguide 52 from first optical fiber, 82 lead-in light input waveguides 51 and beam split, remerges optical output waveguide 53.When between electrode 54,55 and the electrode 56 voltage difference being arranged, then cause the refraction index changing of light phase modulation waveguide 52, make the pass through phase differential of laser light wave of two light phase modulation waveguides 52 change, so the output light intensity of the interference light of optical output waveguide 52 will change with the potential difference (PD) of 56 at electrode 54,55 and electrode.
Fig. 4 is the synoptic diagram of electromagnetic field sensing element 70 of the present invention.As shown in Figure 4, electromagnetic field sensing element 70 is to be made in (for example substrate of mica material) on the substrate 90, and its shape can be annular, circle, cubic type, or Qi Ta Fitness When Knot Agencies.In addition, on the 3 D electromagnetic field measurement, three groups of electromagnetic field sensing elements 70 can be installed on orthogonal cubical three surfaces, cooperate San Group Guang Tone system device, can realize the measurement of 3 D electromagnetic field.
After electromagnetic field sensing element 70 senses electromagnetic field, on the laser signal that electromagnetic field signal Ji Tone system goes out to Lose.The temperature drift meeting causes the drift of the proper phase difference of Two road laser, From and cause the Changeization of Dian Ci Chang Xin Tone Zhi sensitiveness and Line degree.This will make signal magnitude change and cause measuring error.When causing the waveguide optical path difference, temperature variation changes, and then make when the interference signal position is accurate to drift about, the present invention can be by detecting the average bit standard of output light signal, and get the direct current composition of photodetector 84 electrical signal converted, be fed back to LASER Light Source generator 80 control optical wavelengths by optical maser wavelength controller 88, make and interfere the position certainly to hold fixing (outputting level that promptly keeps this photomodulator 50).
Compared with prior art, because the present invention uses the electromagnetic field sensing element by photoswitch control, therefore can measure the electric field signal and the field signal of electromagnetic field to be measured by single electromagnetic field sensing element.In addition, the present invention is also by the average bit standard that detects the output light signal, and the direct current composition of getting the photodetector electrical signal converted is fed back to LASER Light Source generator control optical wavelength, overcome the problem of temperature drift effectively.
Technology contents of the present invention and technical characterstic disclose as above, yet those skilled in the art still may be based on teaching of the present invention and announcement and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by the present patent application claim.
Claims (13)
1. an electromagnetic field sensing element is characterized in that it comprises: one first conducting line segment; One is arranged at first photoswitch of this first conducting line segment end; One is arranged at second photoswitch of another end of this first conducting line segment; One second conducting line segment that is connected with this first conducting line segment via this first photoswitch; The one privates section that is connected with this first conducting line segment via this second photoswitch; It is characterized in that when this first photoswitch and this second photoswitch conducting, being used for sensing magnetic field, and when this first photoswitch and this not conducting of second photoswitch, be used for the sensing electric field.
2. electromagnetic field sensing element as claimed in claim 1 is characterized in that it is to be made on the substrate of a mica material.
3. electromagnetic field sensing element as claimed in claim 1 is characterized in that described first photoswitch or this second photoswitch are to transmit switching signal by an optical fiber.
4. electromagnetic field sensing element as claimed in claim 1 is characterized in that described second conducting line segment and this privates section are to be provided with in line.
5. electromagnetic field sensing element as claimed in claim 1 is characterized in that described first conducting line segment, this second conducting line segment and this privates section are to be arranged to an annular.
6. electromagnetic field sensing element as claimed in claim 5 is characterized in that described annular is square or circle.
7. electromagnetic field sensing apparatus is characterized in that it comprises:
One photomodulator is according to the light wave amplitude of an electric field intensity change that applies through its transmission;
One electromagnetic field sensing element is used for the electromagnetic field signal of sensing is converted to electric field, and puts on this photomodulator;
One lasing light emitter is used to produce the laser light wave;
One first optical fiber is used for this light wave is sent to this photomodulator;
One second optical fiber is connected to this photomodulator;
One photodetector is used for converting the light wave that this second optical fiber is transmitted to an electric signal.
8. electromagnetic field sensing apparatus as claimed in claim 7 is characterized in that described electromagnetic field sensing element comprises: one first conducting line segment; One is arranged at first photoswitch of the end of this first conducting line segment; One is arranged at second photoswitch of another end of this first conducting line segment; One second conducting line segment that is connected with this first conducting line segment via this first photoswitch; An and privates section that is connected with this first conducting line segment via this second photoswitch;
It is characterized in that when this first photoswitch and this second photoswitch conducting, being used for sensing magnetic field, and when this first photoswitch and this not conducting of second photoswitch, be used for the sensing electric field.
9. electromagnetic field sensing apparatus as claimed in claim 7 is characterized in that described electromagnetic field sensing element is to be made on the substrate of a mica material.
10. electromagnetic field sensing apparatus as claimed in claim 8 is characterized in that described second conducting line segment and this privates section are to be provided with in line.
11. electromagnetic field sensing apparatus as claimed in claim 8 is characterized in that described first conducting line segment, this second conducting line segment and this privates section are to be arranged to an annular.
12. electromagnetic field sensing apparatus as claimed in claim 11 is characterized in that described annular is square or circle.
13. electromagnetic field sensing apparatus as claimed in claim 7 is characterized in that described photodetector can be fed back to this LASER Light Source generator with the average bit standard of output light signal, with the control optical wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101013509A CN100390549C (en) | 2003-10-15 | 2003-10-15 | Electromagnetic field sensing element and its apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101013509A CN100390549C (en) | 2003-10-15 | 2003-10-15 | Electromagnetic field sensing element and its apparatus |
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| Publication Number | Publication Date |
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| CN1607393A true CN1607393A (en) | 2005-04-20 |
| CN100390549C CN100390549C (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101013509A Expired - Fee Related CN100390549C (en) | 2003-10-15 | 2003-10-15 | Electromagnetic field sensing element and its apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102735948A (en) * | 2011-03-29 | 2012-10-17 | 住友大阪水泥股份有限公司 | Electric field measuring device |
| CN103134997A (en) * | 2013-01-30 | 2013-06-05 | 中国电子科技集团公司第三十八研究所 | Thunder and lightening detector based on optics principle |
| CN105527503A (en) * | 2014-12-12 | 2016-04-27 | 国家电网公司 | Detection method for internal and external electric field intensities of shielding clothes of live-line worker |
| CN105676003A (en) * | 2014-12-05 | 2016-06-15 | 韩国标准科学硏究院 | Electromagnetic wave power sensing apparatus and system comprising thereof |
| CN105789902A (en) * | 2010-02-11 | 2016-07-20 | 多康股份公司 | Compound loop antenna |
| CN107849896A (en) * | 2015-04-01 | 2018-03-27 | 安泰克安全公司 | home security system |
| CN108968955A (en) * | 2018-07-02 | 2018-12-11 | 天津大学 | A kind of helmet-type brain electricity cap based on optical crystal |
| CN111025034A (en) * | 2019-11-27 | 2020-04-17 | 中国船舶重工集团有限公司第七一0研究所 | Underwater electric field signal active detection circuit and detection method |
Families Citing this family (1)
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| US11092623B2 (en) | 2018-12-11 | 2021-08-17 | Electronics And Telecommunications Research Institute | Current sensor for measuring alternating electromagnetic wave and a current breaker using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014532B (en) * | 1987-03-28 | 1991-10-30 | 华东化工学院 | Combinative leaching and extracting method, leachex |
| US5457394A (en) * | 1993-04-12 | 1995-10-10 | The Regents Of The University Of California | Impulse radar studfinder |
| CN2281541Y (en) * | 1996-12-24 | 1998-05-13 | 中国科学院兰州高原大气物理研究所 | Downward electric field instrument |
| US6263288B1 (en) * | 1998-07-22 | 2001-07-17 | Eastman Kodak Company | Method and apparatus for indicating proximity of film scanner to CRT display monitor |
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2003
- 2003-10-15 CN CNB2003101013509A patent/CN100390549C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789902A (en) * | 2010-02-11 | 2016-07-20 | 多康股份公司 | Compound loop antenna |
| CN105789902B (en) * | 2010-02-11 | 2021-05-07 | 多康股份公司 | Composite loop antenna |
| CN102735948A (en) * | 2011-03-29 | 2012-10-17 | 住友大阪水泥股份有限公司 | Electric field measuring device |
| CN103134997A (en) * | 2013-01-30 | 2013-06-05 | 中国电子科技集团公司第三十八研究所 | Thunder and lightening detector based on optics principle |
| CN103134997B (en) * | 2013-01-30 | 2015-11-25 | 中国电子科技集团公司第三十八研究所 | A kind of lightening detection device based on optical principle |
| CN105676003A (en) * | 2014-12-05 | 2016-06-15 | 韩国标准科学硏究院 | Electromagnetic wave power sensing apparatus and system comprising thereof |
| CN105676003B (en) * | 2014-12-05 | 2018-09-28 | 韩国标准科学硏究院 | Electromagnetic wave power sensing device and the system for including the electromagnetic wave power sensing device |
| CN105527503A (en) * | 2014-12-12 | 2016-04-27 | 国家电网公司 | Detection method for internal and external electric field intensities of shielding clothes of live-line worker |
| CN107849896A (en) * | 2015-04-01 | 2018-03-27 | 安泰克安全公司 | home security system |
| CN107849896B (en) * | 2015-04-01 | 2020-02-21 | 安泰克安全公司 | Household safety system |
| CN108968955A (en) * | 2018-07-02 | 2018-12-11 | 天津大学 | A kind of helmet-type brain electricity cap based on optical crystal |
| CN111025034A (en) * | 2019-11-27 | 2020-04-17 | 中国船舶重工集团有限公司第七一0研究所 | Underwater electric field signal active detection circuit and detection method |
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|---|---|
| CN100390549C (en) | 2008-05-28 |
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