CN114002494A - Current sensing device based on vector light field cavity enhancement effect - Google Patents
Current sensing device based on vector light field cavity enhancement effect Download PDFInfo
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- CN114002494A CN114002494A CN202111245910.2A CN202111245910A CN114002494A CN 114002494 A CN114002494 A CN 114002494A CN 202111245910 A CN202111245910 A CN 202111245910A CN 114002494 A CN114002494 A CN 114002494A
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Abstract
The invention relates to a current sensing device based on a vector light field cavity enhancement effect. The high-precision laser power generation device comprises a laser light source, a light field regulator, a polarization beam splitter, a light beam shaper and a high-precision cavity, wherein the light field regulator, the polarization beam splitter, the light beam shaper and the high-precision cavity are sequentially arranged on a path of a laser light source outgoing light beam, an alkali metal atom air chamber is arranged in a central area of the high-precision cavity and is arranged in a magnetic field area generated by a detection current, a spherical surface of the high-precision cavity faces the laser light source outgoing light beam, the high-precision cavity is provided with two spherical light beam outgoing ends, the two spherical light beam outgoing ends are respectively provided with two light beam polarization analysis sensors for receiving the outgoing light beam of the high-precision cavity, and the two light beam polarization analysis sensors are all in communication connection with the same information processing unit. The information processing unit obtains magnetic field information of a space where the alkali metal atom gas chamber is located by analyzing the polarization characteristic of the information optical field, and obtains current information by detecting the current magnetic effect through an optical method, and the optical field has no electromagnetic interference behavior and higher stability.
Description
Technical Field
The invention belongs to the technical field of optics, and particularly relates to a current sensing device based on a vector light field cavity enhancement effect.
Background
The electric quantity passing through any cross section of a conductor in unit time is called current intensity, which is called current for short, the current symbol is I, the unit is ampere (indicated by letter A), and the free charges in the conductor do regular directional motion under the action of an electric field to form the current. The current sensor is a detection device, can sense the information of the current to be detected, can convert the sensed information into an electric signal meeting certain standards or information in other required forms to be output according to a certain rule, is widely applied to the fields of power transmission, automation, the internet of things, power supply systems, transformer stations, lightning protection, electrical engineering, electronic technology and the like, and plays an important role.
In the prior art, there are various current sensing devices, which can be mainly classified into: shunts, electromagnetic current transformers, electronic current transformers, and the like. The electronic current transformer comprises a Hall current sensor, a Rogowski current sensor, a variable-frequency power sensor and the like; the electronic current transformer has no ferromagnetic saturation, wide transmission frequency band and small secondary load capacity; see U.S. patent "Hall effect current sensor", patent No.: US10,823,764B 2, patent grant time: on 3.11.2020, the applicant is TE Connectivity corporation in the united states, and despite certain advantages of the prior art, there are some essential disadvantages: 1) the current detection is carried out based on the electromagnetic field propagation characteristic, and the current detection is essentially insufficient in anti-electromagnetic interference characteristic and is easily influenced by external electromagnetism; 2) when current passes through the sensor perpendicularly to an external magnetic field, current carriers deflect, an additional electric field is generated in a direction perpendicular to the current and the magnetic field, so that potential difference is generated at two ends of a semiconductor, current sensing is performed by utilizing the potential difference, the detection sensitivity is limited essentially, and high-sensitivity current sensing cannot be realized; 3) in the use process of the prior art, certain space placement requirements are required to be carried out on the current conductor to be detected, and even a sensing device is required to be sleeved on the current conductor, so that the application range of current sensing is severely limited, and the use flexibility is obviously influenced; 4) because the main body perception mechanism is based on electromagnetic field conversion, the conversion between an electromagnetic field and electronic parameters, the time dynamic response range of the sensing system is small, and the detection interval has a certain limited range.
Disclosure of Invention
Technical problem to be solved by the invention
The invention aims to solve the problems of poor anti-interference capability and low sensitivity of the existing current sensing device.
Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a current sensing device based on a vector light field cavity enhancement effect, which comprises a laser light source, a light field regulator, a polarization beam splitter, a light beam shaper and a high-fineness cavity, wherein the light field regulator, the polarization beam splitter, the light beam shaper and the high-fineness cavity are sequentially arranged on an outgoing light beam path of the laser light source, an alkali metal atom air chamber is arranged in the central area of the high-fineness cavity, the alkali metal atom air chamber is arranged in a magnetic field area generated by detection current, the spherical surface of the high-fineness cavity emits light beams towards the laser light source, the high-fineness cavity is provided with two spherical light beam outgoing ends, the two spherical light beam outgoing ends are respectively provided with two light beam polarization analysis sensors for receiving the outgoing light beams of the high-fineness cavity, and the two light beam polarization analysis sensors are both in communication connection with the same information processing unit.
Preferably, the two spherical light beam exit ends are a spherical light beam exit end i and a spherical light beam exit end ii respectively, the two light beam polarization analysis sensors are a light beam polarization analysis sensor i and a light beam polarization analysis sensor ii respectively, an exit light beam at the spherical light beam exit end i is received by the light beam polarization analysis sensor i, and an exit light beam at the spherical light beam exit end ii is received by the light beam polarization analysis sensor ii after passing through the light beam shaper and the polarization beam splitter in sequence.
Preferably, the laser light source is one of a linear polarization laser light source, a circular polarization light source, a radial polarization light source and an azimuth polarization light source.
Preferably, the optical field regulator adopts one of a liquid crystal-based polarization spatial light modulator, a micro-nano structure polarization device and a micro-mirror array polarization device.
Preferably, the polarization beam splitter adopts one of a polarization beam splitter prism and a polarization beam splitter prism plane mirror.
Preferably, the beam shaper is one of a transmissive beam shaper and a reflective beam shaper.
Preferably, one of rubidium atoms and cesium atoms is used in the alkali metal atom gas chamber.
Preferably, the first beam polarization analysis sensor and the second beam polarization analysis sensor both use a beam polarization analysis sensing device integrated by a polarization selector and a photodetector.
Preferably, the information processing unit adopts one of a computer and a singlechip.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention relates to a current sensing device based on a vector light field cavity enhancement effect, which comprises a laser light source, a light field regulator, a polarization beam splitter, a light beam shaper and a high-fineness cavity, wherein the light field regulator, the polarization beam splitter, the light beam shaper and the high-fineness cavity are sequentially arranged on an outgoing light beam path of the laser light source, an alkali metal atom air chamber is arranged in the central area of the high-fineness cavity, the alkali metal atom air chamber is arranged in a magnetic field area generated by detection current, the spherical surface of the high-fineness cavity faces the laser light source to emit light beams, the high-fineness cavity is provided with two spherical surface light beam outgoing ends, the two spherical surface light beam outgoing ends are respectively provided with two light beam polarization analysis sensors for receiving the outgoing light beams of the high-fineness cavity, and the two light beam polarization analysis sensors are both in communication connection with the same information processing unit. The information processing unit obtains the magnetic field information of the space where the alkali metal atom gas chamber is located by analyzing the polarization characteristic of the information light field, and the magnitude of the detected current is obtained through the current magnetic effect. The current magnetic effect is combined with the full-optical weak magnetic detection technology, the current magnetic effect is detected by an optical method, current information is further obtained, and an optical field cannot have electromagnetic interference behaviors, so that the device has good anti-electromagnetic interference characteristics and is not easily influenced by external electromagnetism.
Drawings
Fig. 1 is a schematic structural diagram of a current sensing device based on a vector optical field cavity enhancement effect according to the present invention.
The reference numerals in the schematic drawings illustrate:
1. detecting the current; 2. an alkali metal atom gas cell; 3. an alkali metal atom gas cell; 4. a beam shaper; 5. a polarizing beam splitter; 6. a light field adjuster; 7. a laser light source; 8. a first light beam polarization analysis sensor; 9. a second light beam polarization analysis sensor; 10. an information processing unit.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to the attached drawing 1, the current sensing device based on the vector light field cavity enhancement effect of the embodiment includes a laser light source 7, and a light field regulator 6, a polarization beam splitter 5, a light beam shaper 4 and a high-fineness cavity 3 which are sequentially arranged on an outgoing light beam path of the laser light source 7, wherein an alkali metal atom air chamber 2 is arranged in the center region of the high-fineness cavity 3, the alkali metal atom air chamber 2 is arranged in a magnetic field region generated by a detection current 1, a spherical surface of the high-fineness cavity 3 emits light beams towards the laser light source 7, the high-fineness cavity 3 is provided with two spherical light beam emitting ends, the two spherical light beam emitting ends are respectively provided with two light beam polarization analysis sensors for receiving the outgoing light beams of the high-fineness cavity 3, and the two light beam polarization analysis sensors are both in communication connection with the same information processing unit 10. The information processing unit 10 obtains the magnetic field information of the space where the alkali metal atom gas chamber 2 is located by analyzing the polarization characteristic of the information optical field, and obtains the magnitude of the detected current 1 through the current magnetic effect.
The current magnetic effect and the full-optical weak magnetic detection technology are combined, the current magnetic effect is detected through an optical method, current information is further obtained, an optical field cannot have electromagnetic interference behaviors, and the essence determines that the device has good anti-electromagnetic interference characteristics and is not easily influenced by external electromagnetism;
the device has the advantages that by utilizing the vector characteristics of the light field and the cavity enhancement principle, the light field is transmitted in the high-fineness cavity, the effective action times are increased, the cascade enhancement action of detection signals is essentially realized, meanwhile, as the laser beam generates the vector light field through the light field regulator 6, the vector light field passes through the polarization beam splitter 5 and the light beam shaper 4 and enters the high-fineness cavity 3, the vector characteristics of the light field further improve the detection sensitivity, and the device has the essential characteristics of high sensing sensitivity and the like;
an alkali metal atom air chamber 2 is arranged in the high-fineness cavity 3, and the alkali metal atom air chamber 2 is positioned in a magnetic field area generated by the detected current 1; the information processing unit 10 obtains magnetic field information by analyzing the polarization characteristic of an information optical field, obtains the magnetic field information by current magnetic effect, and detects current parameters.
The spherical light beam exit end is a spherical light beam exit end I and a spherical light beam exit end II, the two light beam polarization analysis sensors are a light beam polarization analysis sensor I8 and a light beam polarization analysis sensor II 9 respectively, the exit light beam of the spherical light beam exit end I is received by the light beam polarization analysis sensor I8, the exit light beam of the spherical light beam exit end II is received by the light beam polarization analysis sensor II 9 after passing through a light beam shaper 4 and a polarization beam splitter 5 in sequence, the light pumping part of the vector light field is subjected to atomic polarization, the light pumping part of the vector light field is subjected to weak magnetic information extraction, the information light field is received by the light beam polarization analysis sensor I8 and the light beam polarization analysis sensor II 9 after exiting through two light beams of a high-fineness cavity 3 respectively The use is convenient.
The laser light source 7 is one of a linear polarization laser light source, a circular polarization light source, a radial polarization light source and an azimuth polarization light source.
The optical field regulator 6 adopts one of a polarization spatial light modulator based on liquid crystal, a micro-nano structure polarization device and a micro-mirror array polarization device.
The polarization spectroscope 5 adopts one of a polarization beam splitter prism and a polarization beam splitter prism plane mirror.
The beam shaper 4 is one of a transmissive beam shaper and a reflective beam shaper.
One of rubidium atoms and cesium atoms is used in the alkali metal atom gas chamber 3.
The first beam polarization analysis sensor 8 and the second beam polarization analysis sensor 9 both adopt a beam polarization analysis sensing device integrated by a polarization selector and a photoelectric detector.
The information processing unit 10 is one of a computer and a single chip microcomputer.
The working process is as follows: the path of the light beam emitted by the laser source 7 sequentially passes through the light field regulator 6, the polarization beam splitter 5, the light beam shaper 4 and the high-fineness cavity 3, the light beam emitted by the laser source 7 is regulated by the light field regulator 6 to become a vector light beam, and the vector light beam is subjected to intracavity return propagation in the high-fineness cavity 3. At the spherical light beam exit end of the high-fineness cavity 3, one path of light beam returns and propagates according to the direction of an incident light beam, and is received by a second light beam polarization analysis sensor 9 after passing through a light beam shaper 4 and a polarization beam splitter 5 in sequence, the other path of light beam is received by a first light beam polarization analysis sensor 8, the first light beam polarization analysis sensor 8 and the second light beam polarization analysis sensor 9 are both connected with an information processing unit 10, the information processing unit 10 obtains magnetic field information of the space where the alkali metal atom gas chamber 2 is located by analyzing the polarization characteristics of an information light field, and the size of the detected current is obtained through the current magnetic effect.
The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A current sensing device based on vector light field cavity enhancement effect is characterized in that: including laser light source (7) with set gradually in light field regulator (6), polarization spectroscope (5), beam shaper (4) and high fineness chamber (3) of laser light source (7) outgoing beam route, high fineness chamber (3) central zone is equipped with alkali metal atom air chamber (2), alkali metal atom air chamber (2) set up in the magnetic field area that measuring current (1) produced, the sphere of high fineness chamber (3) is towards laser light source (7) outgoing beam, high fineness chamber (3) are equipped with two sphere beam outgoing ends, two sphere beam outgoing end is equipped with the outgoing beam that two beam polarization analysis sensors are used for receiving high fineness chamber (3) respectively, two the equal communication of beam polarization analysis sensor is connected with same information processing unit (10).
2. The current sensing device according to claim 1, wherein: the two spherical light beam outgoing ends are respectively a spherical light beam outgoing end I and a spherical light beam outgoing end II, the two light beam polarization analysis sensors are respectively a light beam polarization analysis sensor I (8) and a light beam polarization analysis sensor II (9), the outgoing light beam of the spherical light beam outgoing end I is received by the light beam polarization analysis sensor I (8), and the outgoing light beam of the spherical light beam outgoing end II is received by the light beam polarization analysis sensor II (9) after sequentially passing through a light beam shaper (4) and a polarization beam splitter (5).
3. The current sensing device according to claim 2, wherein: the laser light source (7) adopts one of a linear polarization laser light source, a circular polarization light source, a radial polarization light source and an azimuth angle polarization light source.
4. The current sensing device according to claim 2, wherein: the light field regulator (6) adopts one of a liquid crystal-based polarization spatial light modulator, a micro-nano structure polarization device and a micro-mirror array polarization device.
5. The current sensing device according to claim 2, wherein: the polarization spectroscope (5) adopts one of a polarization beam splitter prism and a polarization beam splitter prism plane mirror.
6. The current sensing device according to claim 2, wherein: the light beam shaper (4) adopts one of a transmission type light beam shaper and a reflection type light beam shaper.
7. The current sensing device according to claim 2, wherein: one of rubidium atoms and cesium atoms is adopted in the alkali metal atom gas chamber (3).
8. The current sensing device according to claim 2, wherein: and the first beam polarization analysis sensor (8) and the second beam polarization analysis sensor (9) both adopt a beam polarization analysis sensing device integrated by a polarization selector and a photoelectric detector.
9. The current sensing device according to claim 2, wherein: the information processing unit (10) adopts one of a computer and a singlechip.
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| CN202111245910.2A CN114002494A (en) | 2021-10-26 | 2021-10-26 | Current sensing device based on vector light field cavity enhancement effect |
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| CN202111245910.2A CN114002494A (en) | 2021-10-26 | 2021-10-26 | Current sensing device based on vector light field cavity enhancement effect |
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