CN112230038A - Novel all-optical current sensor and current measuring method - Google Patents
Novel all-optical current sensor and current measuring method Download PDFInfo
- Publication number
- CN112230038A CN112230038A CN202010923347.9A CN202010923347A CN112230038A CN 112230038 A CN112230038 A CN 112230038A CN 202010923347 A CN202010923347 A CN 202010923347A CN 112230038 A CN112230038 A CN 112230038A
- Authority
- CN
- China
- Prior art keywords
- optical
- laser
- magnetic field
- signal
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/247—Details of the circuitry or construction of devices covered by G01R15/241 - G01R15/246
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a novel all-optical current sensor, which comprises a measuring optical module, a magnetic field probe, a heating optical module and a signal processing circuit, wherein the measuring optical module is arranged on the measuring optical module; the measuring optical module is connected with the magnetic field probe through an optical fiber; the heating optical module is connected with the magnetic field probe through an optical path; the magnetic field probe is connected with the signal processing circuit through a circuit. The measuring optical module comprises a semiconductor laser, a laser control circuit, a convergent lens, an optical isolator, an electro-optic modulator and a first optical fiber coupler; the laser control circuit controls the semiconductor laser to emit laser, and the laser sequentially passes through the convergent lens, the optical isolator, the electro-optic modulator and the first optical fiber coupler and then is transmitted to the magnetic field probe through the optical fiber; the laser control circuit comprises a temperature controller and a current source, wherein the temperature controller and the current source are respectively and electrically connected with the semiconductor laser. The insulativity of the optical fiber sensor is combined with the high measurement precision of the magnetic field probe, so that the measurement precision of the current sensor is improved.
Description
Technical Field
The invention relates to the field of high-voltage current measurement, in particular to a novel all-optical current sensor and a current measurement method.
Background
In an electric power measuring system, the defects of potential safety problem, large volume, high price and the like caused by the traditional oil-filled current sensor cannot be well adapted to the measuring requirement. With the development of optical devices and photoelectric technologies, the optical fiber current sensor has higher safety, relatively simple structure, high insulation level and good anti-electromagnetic interference capability in comparison, but the optical fiber current sensor has limited measurement precision and cannot perform high-precision measurement.
Disclosure of Invention
The invention aims to improve the current measurement precision in a high-voltage large-current environment, and provides a novel current measurement method of an all-optical current sensor.
In order to achieve the technical purpose, the invention provides a technical scheme that the novel all-optical current sensor comprises a measuring optical module, a magnetic field probe, a heating optical module and a signal processing circuit; the measuring optical module is connected with the magnetic field probe through an optical fiber; the heating optical module is connected with the magnetic field probe through an optical path; the magnetic field probe is connected with the signal processing circuit through a circuit.
In the scheme, a laser with the wavelength of 894.6nm is used as a light source, the light intensity of the laser is modulated by the electro-optical modulator, the laser is changed into circularly polarized light through the combination of optical lenses and is injected into an atom air chamber, the atom air chamber is heated by another laser radiation, the laser wavelength is 808nm and does not resonate with alkali metal atoms in the atom air chamber, the circularly polarized light and Cs atoms in the atom air chamber have optical pumping effect, if the light intensity modulation frequency is close to the Larmor precession frequency, the atom magnetic moment performs Larmor precession around the magnetic field direction, the atom absorption rate is changed, the measuring laser penetrating through the atom air chamber is transmitted through an optical fiber and is finally detected by a photoelectric detector, and therefore the measurement of the magnetic field generated by the cable current.
Preferably, the measurement optical module comprises a semiconductor laser, a laser control circuit, a convergent lens, an optical isolator, an electro-optical modulator and a first optical fiber coupler;
the laser control circuit controls the semiconductor laser to emit laser, and the laser sequentially passes through the convergent lens, the optical isolator, the electro-optic modulator and the first optical fiber coupler and then is transmitted to the magnetic field probe through the optical fiber;
the laser control circuit comprises a temperature controller and a current source, wherein the temperature controller and the current source are respectively and electrically connected with the semiconductor laser.
Preferably, the magnetic field probe comprises a polarizer, a quarter-wave plate, an atomic gas chamber and a second optical fiber coupler;
laser emitted by the measurement optical module sequentially passes through the polaroid, the quarter-wave plate and the atom air chamber, and is coupled into the optical fiber through the second optical fiber coupler for transmission until the laser is detected by the photoelectric detector in the signal processing circuit.
Preferably, the signal processing circuit comprises a photodetector, a signal generator and a signal demodulation circuit;
the photoelectric detector converts the detected light intensity signal into a voltage signal, and the voltage signal is transmitted to the signal demodulation circuit for signal demodulation and is connected with the signal demodulation circuit through a circuit;
the signal generator is used for providing a reference signal for the signal demodulation circuit, is used for signal demodulation and is connected with the signal demodulation circuit;
the signal generator controls the signal generator to output a high-frequency modulation signal, and is connected with the electro-optical modulator through a circuit.
Preferably, the atomic gas chamber includes a glass bubble, and the glass bubble is filled with alkali metal saturated vapor.
Preferably, the heating optical module is a heating laser for heating the atomic gas cell.
A current measuring method suitable for a novel all-optical current sensor comprises the following steps:
s1, adjusting a temperature controller and a current source in a laser control circuit to ensure the stable operation of the semiconductor laser, so that the laser wavelength emitted by the semiconductor laser and the alkali metal atoms in the magnetic field probe generate resonance reaction;
s2, adjusting the position of the optical path device to make the semiconductor laser, the convergent lens, the optical isolator, the electro-optical modulator and the first optical fiber coupler on a straight line;
s3, placing the magnetic field probe in a magnetic field generated by the cable, and adjusting the magnetic field probe to enable the laser to be changed into linearly polarized light after passing through the polarizing film;
s4, adjusting the optical axis of the quarter-wave plate to form a degree with the optical axis of the polaroid, changing the laser into circularly polarized light after passing through the quarter-wave plate, sequentially passing through the air chamber and the second optical fiber coupler, and detecting by the photoelectric detector, wherein the propagation direction of the laser and the direction of the air chamber are vertical to the direction of the magnetic field;
s5, adjusting a heating laser, and heating the air chamber by non-resonant laser radiation to ensure stable operation of the resonant effect;
s6, converting the detected light intensity information into a voltage value by the photoelectric detector, and inputting the voltage value into a signal demodulation circuit for signal demodulation; the relationship between the demodulated signal and the frequency output by the signal generator is shown in equation 1:
wherein Y represents a signal obtained by demodulation, omega is the signal frequency output by the signal generator, gamma is the gyromagnetic ratio of alkali metal atoms and is a fixed value, B is the magnetic induction intensity corresponding to the measuring point of the cable to be measured, and v is the magnetic resonance line width; searching a minimum value point of Y, wherein the signal frequency output by the signal generator has a fixed proportional relation with the magnetic induction intensity of the cable to be measured corresponding to the measuring point, namely omega is gamma B;
the relationship between the current of the cable and the magnitude of the magnetic field generated by the cable is shown in equation 2:
wherein, mu0And the magnetic permeability is vacuum magnetic permeability, I is the current in the cable, and R is the distance from the cable to a measured point.
Preferably, the measurement of the current follows the following constraints:
a. the laser wavelength emitted by the semiconductor laser is within the wavelength ranges of the polaroid, the quarter glass and the photoelectric detector;
b. the heating laser and the atomic gas chamber can not generate resonance effect;
c. the direction of a magnetic field generated by the current of the cable to be tested is vertical to the propagation direction of the laser.
The invention has the beneficial effects that: according to the novel all-optical current sensor and the current measuring method, the insulativity of the optical fiber sensor is combined with the high measuring precision of the magnetic field probe, the measuring precision of the current sensor is improved, and the laser is used for heating the atomic gas chamber of the magnetic field probe, so that the safety of a measuring system is improved; the measuring precision is high, and the magnetic field generated around the current is measured through the high-precision magnetic field probe, so that the current magnitude is accurately calculated.
Drawings
Fig. 1 is a schematic structural diagram of a novel all-optical current sensor according to the present invention.
Fig. 2 is a schematic structural diagram of a novel all-optical current sensor according to the present invention.
Fig. 3 is a schematic structural diagram of a laser control circuit of a novel all-optical current sensor according to the present invention.
Figure 4 is a graph of the magnetic resonance spectroscopy results obtained by the present invention.
The notation in the figure is: 1-measuring optical module, 2-magnetic field probe, 3-heating optical module, 4-signal processing circuit, 5-semiconductor laser, 6-laser control circuit, 7-convergent lens, 8-optical isolator, 9-electro-optical modulator, 10-first optical fiber coupler, 11-temperature controller, 12-current source, 13-polaroid, 14-quarter wave plate, 15-atom air chamber, 16-second optical fiber coupler, 17-photoelectric detector, 18-signal generator and 19-signal demodulation circuit.
Detailed Description
For the purpose of better understanding the objects, technical solutions and advantages of the present invention, the following detailed description of the present invention with reference to the accompanying drawings and examples should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and not for limiting the scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts shall fall within the scope of the present invention.
Example (b): a beam of circularly polarized light is formed by the semiconductor laser 5 and some optical components, the light is subjected to electro-optical modulation, the atom air chamber 15 is heated by the heating laser, when the laser penetrates through the atom air chamber 15, under the action of an external magnetic field, alkaline metal atoms in the atom air chamber 15 perform Larmor precession to generate a magnetic resonance effect, the change of the laser light intensity is detected by the photoelectric detector, and finally the size of the detected current is demodulated by the signal processing circuit.
As shown in fig. 1, the all-optical current sensor includes a measurement optical module 1, a magnetic field probe 2, a heating optical module 3, and a signal processing circuit 4; the measurement optical module 1 is connected with the magnetic field probe 2 through an optical fiber; the heating optical module 3 is connected with the magnetic field probe 2 through an optical path; the magnetic field probe 2 is connected with the signal processing circuit 4 through a circuit;
as shown in fig. 2, the measurement optical module 1 is composed of a semiconductor laser 5, a laser control circuit 6, a converging lens 7, an optical isolator 8, an electro-optical modulator 9 and a first optical fiber coupler 10;
the laser control circuit 6 controls the semiconductor laser 5 to emit laser, and the laser sequentially passes through the convergent lens 7, the optical isolator 8, the electro-optic modulator 9 and the first optical fiber coupler 10 and then is transmitted to the magnetic field probe 2 through the optical fiber;
the electro-optical modulator inputs a high-frequency signal by the signal processing circuit 4 and is used for modulating the electro-optical modulator 9;
the magnetic field probe 2 consists of a polaroid 13, a quarter-wave plate 14, an atom gas chamber 15 and a second optical fiber coupler 16; laser emitted by the measurement optical module sequentially passes through the polaroid 13, the quarter-wave plate 14 and the atomic gas chamber 15, is coupled into an optical fiber by the second optical fiber coupler 16 for transmission, and is finally detected by the photoelectric detector 17 in the signal processing circuit 4;
the atomic gas chamber 15 is made by filling alkali metal saturated steam into a glass bubble;
the atomic gas chamber 15 is heated by the heating optical module 3, so that the temperature of the atomic gas chamber 15 is ensured to be constant;
the heating optical module 3 is composed of a heating laser;
the signal processing circuit 4 is composed of a photoelectric detector 17, a signal generator 18 and a signal demodulation circuit 19;
the signal generator 18 is connected with the electro-optical modulator through a circuit, and the control signal generator outputs a high-frequency modulation signal for modulating the electro-optical modulator 9;
the photoelectric detector 17 is connected with the signal demodulation circuit 19 through a circuit, the photoelectric detector 17 converts the detected light intensity signal into a voltage signal, and the voltage signal is transmitted to the signal demodulation circuit 19 for signal demodulation.
As shown in fig. 3, the laser control circuit 6 is constituted by a temperature controller 11 and a current source 12, wherein the temperature controller 11 and the current source directly control the semiconductor laser 5.
A current measuring method suitable for a novel all-optical current sensor comprises the following steps:
s1, adjusting a temperature controller 11 and a current source 12 in a laser control circuit 6 to ensure the stable operation of the semiconductor laser 5, so that the laser wavelength emitted by the semiconductor laser 5 and the alkali metal atoms in the magnetic field probe 2 generate resonance reaction;
s2, adjusting the position of the optical path device to enable the semiconductor laser 5, the convergent lens 7, the optical isolator 8, the electro-optic modulator 9 and the first optical fiber coupler 10 to be on the same straight line;
s3, placing the magnetic field probe 2 in a magnetic field generated by the cable, and adjusting the magnetic field probe 2 to enable the laser to be changed into linearly polarized light after passing through the polarizing film 13;
s4, adjusting the optical axis of the quarter-wave plate 14 to be in a degree with the optical axis of the polaroid 13, converting laser into circularly polarized light after passing through the quarter-wave plate 14, detecting the circularly polarized light by the photoelectric detector 17 after passing through the atom air chamber 15 and the second optical fiber coupler 16 in sequence, and enabling the propagation direction of the laser and the direction of the atom air chamber 15 to be perpendicular to the direction of the magnetic field;
s5, adjusting a heating laser, and heating the air chamber by non-resonant laser radiation to ensure stable operation of the resonant effect;
s6, converting the detected light intensity information into a voltage value by the photoelectric detector 17, and inputting the voltage value into a signal demodulation circuit for signal demodulation; the relationship between the demodulated signal and the frequency output by the signal generator is shown in equation 1:
wherein Y represents a signal obtained by demodulation, omega is the signal frequency output by the signal generator, gamma is the gyromagnetic ratio of alkali metal atoms and is a fixed value, B is the magnetic induction intensity corresponding to the measuring point of the cable to be measured, and v is the magnetic resonance line width; searching a minimum value point of Y, wherein the signal frequency output by the signal generator has a fixed proportional relation with the magnetic induction intensity of the cable to be measured corresponding to the measuring point, namely omega is gamma B;
the relationship between the current of the cable and the magnitude of the magnetic field generated by the cable is shown in equation 2:
wherein, mu0And the magnetic permeability is vacuum magnetic permeability, I is the current in the cable, and R is the distance from the cable to a measured point.
The measurement of the current obeys the following constraints:
a. the laser wavelength emitted by the semiconductor laser is within the wavelength ranges of the polaroid, the quarter glass and the photoelectric detector;
b. the heating laser and the atomic gas chamber can not generate resonance effect;
c. the direction of a magnetic field generated by the current of the cable to be tested is vertical to the propagation direction of the laser.
A specific method for adjusting the full-light type current sensor to carry out current measurement comprises the following steps:
in the embodiment, the current to be measured is 50Hz, the alkali metal in the magnetic field probe 2 adopts Cs-133 atoms, the gyromagnetic ratio is 3.498577Hz/nT, and the size of the glass bubble of the cesium atom saturated steam is phi 10 multiplied by 15 mm. In the use process, a laser control circuit 6 is started firstly, wherein a laser current source 12 adopts a current source with the model number of B2912A produced by Agilent in America, a temperature controller 11 adopts a temperature controller with the model number of TED200C produced by Thorlab in America, the current of a measuring laser is set to be 1.3mA, the temperature is set to be 65 ℃, and the wavelength of a semiconductor laser 5 is stabilized to 894.6 nm; adjusting the space positions of a convergent lens 7, an optical isolator 8, an electro-optic modulator 9 and a first optical fiber coupler 10 to enable laser to pass through and be coupled into an optical fiber in sequence; the adjusting signal generator 18 outputs a high-frequency sinusoidal signal to modulate the electro-optical modulator 9; the magnetic field probe 2 is arranged near the high-voltage cable, and the position of the magnetic field probe 2 is adjusted to ensure that the magnetic field generated by the measured current is vertical to the propagation direction of the laser; in the magnetic field probe 2, the positions of the polaroid 13, the quarter-wave plate 14, the atom air chamber 15 and the second optical fiber coupler 16 are adjusted to enable laser to penetrate through the centers of the polaroid 13, the quarter-wave plate 14 and the atom air chamber, and the included angle between the optical axes of the polaroid 13 and the quarter-wave plate 14 is adjusted to be 45 degrees, so that the laser penetrating through the quarter-wave plate 14 is circularly polarized light; adjusting the heating optical module 3, heating the atomic gas chamber 15 in a laser radiation mode, and providing necessary conditions for magnetic resonance reaction; then the laser is received by the high-sensitivity silicon photodiode and converted into a voltage signal; the high-sensitivity silicon photodiode transmits the received voltage signal to the signal demodulation circuit 19, adjusts the frequency of the signal generator to enable the signal generator to generate a resonance phenomenon, and realizes measurement of the magnitude of the alternating current to be measured according to the formulas (1) and (2).
The above-mentioned glass bubbles of Cs-133 atom saturated vapor are the atomic gas cells 15.
The high sensitivity silicon photodiode mentioned above is the photodetector 17.
As shown in fig. 4, the magnetic resonance spectrum obtained by the present invention is represented by the signal frequency (abscissa) output from the signal generator 18 and the demodulated signal Y (ordinate).
The above results are measured at a cable current of 500A and a magnetic field probe 2 at a distance of 1m from the cable. As can be seen from fig. 4, when the frequency of the signal output by the signal generator 18 is 0.35MHz, a resonance phenomenon occurs, the obtained magnetic field value is 100040nT, and according to the formula (2), the current measurement value is calculated to be 500.2A, and the deviation from the theoretical value is small, thereby realizing the precise measurement of high voltage and large current.
The above-mentioned embodiments are preferred embodiments of the novel all-optical current sensor and the current measuring method of the present invention, and the scope of the present invention is not limited thereto, and all equivalent changes in shape and structure according to the present invention are within the scope of the present invention.
Claims (8)
1. A novel all-optical current sensor and a current measuring method are characterized by comprising a measuring optical module, a magnetic field probe, a heating optical module and a signal processing circuit; the measuring optical module is connected with the magnetic field probe through an optical fiber; the heating optical module is connected with the magnetic field probe through an optical path; the magnetic field probe is connected with the signal processing circuit through a circuit.
2. The novel all-optical current sensor as claimed in claim 1, wherein the measuring optical module comprises a semiconductor laser, a laser control circuit, a converging lens, an optical isolator, an electro-optical modulator and a first optical fiber coupler; the laser control circuit controls the semiconductor laser to emit laser, and the laser sequentially passes through the convergent lens, the optical isolator, the electro-optic modulator and the first optical fiber coupler and then is transmitted to the magnetic field probe through the optical fiber;
the laser control circuit comprises a temperature controller and a current source, wherein the temperature controller and the current source are respectively and electrically connected with the semiconductor laser.
3. The novel all-optical current sensor according to claim 2,
the magnetic field probe comprises a polaroid, a quarter-wave plate, an atom gas chamber and a second optical fiber coupler;
laser emitted by the measurement optical module sequentially passes through the polaroid, the quarter-wave plate and the atom air chamber, and is coupled into the optical fiber through the second optical fiber coupler for transmission until the laser is detected by the photoelectric detector in the signal processing circuit.
4. The novel all-optical current sensor according to claim 3,
the signal processing circuit comprises a photoelectric detector, a signal generator and a signal demodulation circuit;
the photoelectric detector converts the detected light intensity signal into a voltage signal, and the voltage signal is transmitted to the signal demodulation circuit for signal demodulation and is connected with the signal demodulation circuit through a circuit;
the signal generator is used for providing a reference signal for the signal demodulation circuit, is used for signal demodulation and is connected with the signal demodulation circuit;
the signal generator controls the signal generator to output a high-frequency modulation signal, and is connected with the electro-optical modulator through a circuit.
5. The novel all-optical current sensor according to claim 3,
the atomic gas chamber comprises a glass bubble, and alkali metal saturated steam is filled in the glass bubble.
6. The novel all-optical current sensor according to claim 5,
the heating optical module is a heating laser for heating the atomic gas chamber.
7. A current measuring method applied to the novel full-optical current sensor as claimed in claim 4, comprising the following steps:
s1, adjusting a temperature controller and a current source in a laser control circuit to ensure the stable operation of the semiconductor laser, so that the laser wavelength emitted by the semiconductor laser and the alkali metal atoms in the magnetic field probe generate resonance reaction;
s2, adjusting the position of the optical path device to make the semiconductor laser, the convergent lens, the optical isolator, the electro-optical modulator and the first optical fiber coupler on a straight line;
s3, placing the magnetic field probe in a magnetic field generated by the cable, and adjusting the magnetic field probe to enable the laser to be changed into linearly polarized light after passing through the polarizing film;
s4, adjusting the optical axis of the quarter-wave plate to form a degree with the optical axis of the polaroid, changing the laser into circularly polarized light after passing through the quarter-wave plate, sequentially passing through the air chamber and the second optical fiber coupler, and detecting by the photoelectric detector, wherein the propagation direction of the laser and the direction of the air chamber are vertical to the direction of the magnetic field;
s5, adjusting a heating laser, and heating the air chamber by non-resonant laser radiation to ensure stable operation of the resonant effect;
s6, converting the detected light intensity information into a voltage value by the photoelectric detector, and inputting the voltage value into a signal demodulation circuit for signal demodulation; the relationship between the demodulated signal and the frequency output by the signal generator is shown in equation 1:
wherein Y represents a signal obtained by demodulation, omega is the signal frequency output by the signal generator, gamma is the gyromagnetic ratio of alkali metal atoms and is a fixed value, B is the magnetic induction intensity corresponding to the measuring point of the cable to be measured, and v is the magnetic resonance line width; searching a minimum value point of Y, wherein the signal frequency output by the signal generator has a fixed proportional relation with the magnetic induction intensity of the cable to be measured corresponding to the measuring point, namely omega is gamma B;
the relationship between the current of the cable and the magnitude of the magnetic field generated by the cable is shown in equation 2:
wherein, mu0And the magnetic permeability is vacuum magnetic permeability, I is the current in the cable, and R is the distance from the cable to a measured point.
8. A current measuring method according to claim 7, characterized in that the measurement of the current complies with the following constraints:
a. the laser wavelength emitted by the semiconductor laser is within the wavelength ranges of the polaroid, the quarter glass and the photoelectric detector;
b. the heating laser and the atomic gas chamber can not generate resonance effect;
c. the direction of a magnetic field generated by the current of the cable to be tested is vertical to the propagation direction of the laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923347.9A CN112230038B (en) | 2020-09-04 | 2020-09-04 | Novel all-optical current sensor and current measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010923347.9A CN112230038B (en) | 2020-09-04 | 2020-09-04 | Novel all-optical current sensor and current measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112230038A true CN112230038A (en) | 2021-01-15 |
| CN112230038B CN112230038B (en) | 2022-09-13 |
Family
ID=74116516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010923347.9A Active CN112230038B (en) | 2020-09-04 | 2020-09-04 | Novel all-optical current sensor and current measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112230038B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973697A (en) * | 2023-06-20 | 2023-10-31 | 无锡广盈集团有限公司 | Leakage current identification system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254550A (en) * | 1995-03-16 | 1996-10-01 | Toshiba Corp | Optical current transformer |
| JPH10221381A (en) * | 1997-02-03 | 1998-08-21 | Advantest Corp | Method and system for precise verification of equilibrium detector |
| CN101793916A (en) * | 2010-03-31 | 2010-08-04 | 哈尔滨工业大学 | All-fiber current monitoring device based on Faraday effect |
| CN105866716A (en) * | 2016-06-23 | 2016-08-17 | 梁尚清 | Novel all-optical type laser light pump magnetometer and realization method thereof |
| CN106200354A (en) * | 2016-08-04 | 2016-12-07 | 北京航天控制仪器研究所 | A kind of optical-fiber type CPT atomic clock physical system |
-
2020
- 2020-09-04 CN CN202010923347.9A patent/CN112230038B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08254550A (en) * | 1995-03-16 | 1996-10-01 | Toshiba Corp | Optical current transformer |
| JPH10221381A (en) * | 1997-02-03 | 1998-08-21 | Advantest Corp | Method and system for precise verification of equilibrium detector |
| CN101793916A (en) * | 2010-03-31 | 2010-08-04 | 哈尔滨工业大学 | All-fiber current monitoring device based on Faraday effect |
| CN105866716A (en) * | 2016-06-23 | 2016-08-17 | 梁尚清 | Novel all-optical type laser light pump magnetometer and realization method thereof |
| CN106200354A (en) * | 2016-08-04 | 2016-12-07 | 北京航天控制仪器研究所 | A kind of optical-fiber type CPT atomic clock physical system |
Non-Patent Citations (1)
| Title |
|---|
| 陈立杰等: ""高稳定激光原子磁力仪恒流源电路设计"", 《激光与红外》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973697A (en) * | 2023-06-20 | 2023-10-31 | 无锡广盈集团有限公司 | Leakage current identification system and method |
| CN116973697B (en) * | 2023-06-20 | 2024-03-26 | 无锡广盈集团有限公司 | Leakage current identification system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112230038B (en) | 2022-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110401492A (en) | A kind of radio amplitude-modulated signal method of reseptance and amplitude modulation Quantum receiver based on quantum effect | |
| CN112098737B (en) | Method and device for measuring intensity of microwave electric field | |
| CN105651649A (en) | Real-time online atomic density measuring method suitable for atom magnetometer | |
| CN108956544B (en) | Automatic detection system and method for transverse relaxation time of atoms | |
| CN104132798A (en) | Y-waveguide integrated optics phase modulator modulation factor measurement device and method | |
| CN113945744B (en) | All-fiber direct current transformer temperature compensation system and method | |
| CN112180302B (en) | Atomic magnetometer probe based on optical virtual magnetic field technology | |
| CN111610470B (en) | Novel radio frequency atomic magnetometer and implementation method thereof | |
| CN111854724B (en) | Atomic spin precession detection device and method | |
| CN110988504A (en) | Laser intensity stability control device and method for Reidberg atom microwave electric field intensity meter | |
| CN112230038B (en) | Novel all-optical current sensor and current measuring method | |
| CN113721173A (en) | Optical fiber SERF atomic magnetometer device based on reflection type bidirectional pumping | |
| CN104132799A (en) | Ti-diffusion LiNbO3 phase modulator double-refraction modulation factor measurement device and method | |
| WO2011079663A1 (en) | Direct current magneto-optic detecting system and method for optical fiber | |
| US4208129A (en) | Sensitive laser spectroscopy measurement system | |
| CN114322974B (en) | Rb based on MEMS gas chamber -131 Xe atomic spin gyroscope single beam detection system and method | |
| CN106850065B (en) | Microwave photon temperature sensing system | |
| CN104459350A (en) | Lithium niobate straight waveguide electric field measuring system | |
| WO2021109284A1 (en) | Oeo quick switching-based wide-range and high-precision absolute distance measurement instrument | |
| CN111929199A (en) | Device and method for measuring atomic density of alkali metal vapor in glass alkali metal air chamber | |
| CN113655413B (en) | Optical fiber type atomic magnetometer probe and adjusting method thereof | |
| CN114217249B (en) | Non-blind-area magnetic field measuring device and measuring method based on laser polarization modulation | |
| CN219573902U (en) | Gas sensing device | |
| CN117572056A (en) | Weak current detection system based on quantum mixing and method and application thereof | |
| CN116819183A (en) | DC electric field intensity measuring device and method based on electromagnetic induction transparent spectrum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |