CN112526417A - Multi-dimensional balanced magnetic field measurement system and method - Google Patents
Multi-dimensional balanced magnetic field measurement system and method Download PDFInfo
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- CN112526417A CN112526417A CN202011320082.XA CN202011320082A CN112526417A CN 112526417 A CN112526417 A CN 112526417A CN 202011320082 A CN202011320082 A CN 202011320082A CN 112526417 A CN112526417 A CN 112526417A
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- 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
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
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- 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
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
- G01R33/072—Constructional adaptation of the sensor to specific applications
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The application provides a multidimensional balanced magnetic field measurement system and a method, the multidimensional balanced magnetic field measurement system comprises: the magnetic field sensing array, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software are electrically connected in sequence; the magnetic field sensing array is used for generating a plurality of magnetic field differential signals in a magnetic field to be measured; the parallel module is used for carrying out mean processing on a plurality of magnetic field differential signals generated in each magnetic field induction array; the active integration module is used for integrating and operating the magnetic field differential signal and reducing the magnetic field differential signal into an analog signal; the data acquisition unit is used for acquiring the analog signals and converting the analog signals into digital signals; the photoelectric conversion module is used for converting the digital signal into an optical signal; and the calculation analysis software is used for carrying out analysis calculation on preset parameters and algorithms for installing the optical signals, drawing a change curve of the measured magnetic field and solving time parameters and amplitude parameters of the measured magnetic field. The magnetic field detection device can effectively detect a plurality of point magnetic fields, and ensures the accuracy of magnetic field measurement.
Description
Technical Field
The invention belongs to the technical field of electrical measurement, and particularly relates to a measuring system and method for a multi-dimensional balanced magnetic field.
Background
When lightning strikes on objects such as transmission lines, buildings and the like, extremely high voltage is generated, insulation flashover or breakdown is caused, and meanwhile, strong impact current is attached, so that very high ground potential lifting is generated, and equipment and personal safety are seriously damaged.
In order to research the influence of lightning current on equipment and further provide technical support for the design of the current tolerance capability of the equipment, the impact current test equipment simulates lightning current in a laboratory, and lightning protection equipment and electrical products such as a lightning arrester, a valve plate, a high-power resistor and the like need to be subjected to impact current tolerance tests.
The magnetic field induction coil is a small conductor annular coil, and due to the change of the measured magnetic field, the magnetic flux in the coil can be changed, so that induced electromotive force is generated, namely the induced voltage is in direct proportion to the change rate of the magnetic flux passing through the coil. The magnetic field induction coil works according to a Faraday electromagnetic induction principle, the magnetic field expands forwards along with the movement of the armature, and the changing magnetic field induces a changing signal in the transient magnetic field probe, so that the changing characteristic of the transient magnetic field probe signal can reflect the position of the armature. However, a magnetic field signal measured by one magnetic field induction coil can only reflect one point magnetic field value of the same space magnetic field, but there are many point magnetic fields with the same spacing, and the integrated calculation of the multiple point magnetic field values is difficult, and the accuracy of magnetic field measurement cannot be guaranteed.
Disclosure of Invention
In view of this, the present invention aims to provide a system and a method for measuring a multi-dimensional balanced magnetic field, so as to solve the technical problems of difficulty in measuring a power frequency magnetic field and an impact transient magnetic field and poor accuracy.
In a first aspect, the present application provides a multi-dimensional balanced magnetic field measurement system comprising:
the magnetic field sensing array, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software are electrically connected in sequence;
the magnetic field sensing array is used for generating a plurality of magnetic field differential signals in a magnetic field to be measured;
the parallel module is used for carrying out mean processing on a plurality of magnetic field differential signals generated in each magnetic field induction array;
the active integration module is used for integrating the magnetic field differential signal and reducing the magnetic field differential signal into an analog signal;
the data acquisition unit is used for acquiring the analog signals and converting the analog signals into digital signals;
the photoelectric conversion module is used for converting the digital signal into an optical signal;
the calculation and analysis software is used for carrying out analysis and calculation on preset parameters and algorithms for installing the optical signals, drawing a change curve of the measured magnetic field, and solving time parameters and amplitude parameters of the measured magnetic field.
Further, the magnetic field sensing array is connected with the parallel module through a measuring high-frequency cable.
Further, the magnetic field sensing array comprises:
the insulating outer frame body is of a circular ring structure, and the outer wall surface of the insulating outer frame body is provided with a plurality of radial slots;
and the magnetic field induction probes are detachably connected in the slots.
Further, the magnetic field induction probe comprises:
a shield case;
the magnetic field induction coil is arranged in the shielding shell, and a lead at one end of the magnetic field induction coil penetrates out of the shielding shell;
and the output port is arranged on the shielding shell and is connected with one end of the magnetic field induction coil penetrating out of the shielding shell.
Furthermore, all the slots on the insulating outer frame body are uniformly arranged along the circumferential direction of the insulating outer frame body.
Furthermore, a plurality of clamping positions are arranged in each slot, and the plurality of clamping positions in each slot are sequentially arranged along the radial direction of the insulating outer frame body;
each magnetic field induction probe can be clamped on the corresponding clamping position in sequence.
Further, the output port is a BNC interface.
Further, the magnetic field induction coil is an enameled wire spiral coil wound with a preset number of turns.
In a second aspect, the present application provides a multi-dimensional balanced magnetic field measurement method, comprising:
step one, mounting a magnetic field induction probe on an insulating outer frame body;
secondly, sleeving the insulating outer frame body on the impact current conducting rod to be detected so that the impact current conducting rod to be detected is coaxial with the insulating outer frame body;
electrically connecting the magnetic field sensing array, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software in sequence;
and fourthly, presetting parameters and algorithms in the computer analysis software, drawing a magnetic field change curve, and solving time parameters and amplitude parameters of the measured magnetic field.
Further, in the first step, a method for mounting the magnetic field induction probe on the insulating outer frame body includes:
acquiring the size of the impulse current to be measured and the measuring environment;
and selecting a preset number of the magnetic field probes to be uniformly installed on the insulating outer frame body, and installing the magnetic field probes on corresponding gears of the slots.
The application has the following beneficial effects:
the multidimensional balanced magnetic field measurement system and the multidimensional balanced magnetic field measurement method adopt the magnetic field sensing array for measuring various transient magnetic fields, the magnetic field sensing array can be selected according to the size of the measured impact current and the measurement environment, a plurality of point magnetic fields can be effectively detected, the measurement proportionality coefficient is fixed through the average value of each direction of the magnetic field to be measured output by the multidimensional balanced magnetic field measurement system, and the accuracy of magnetic field measurement is guaranteed.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a schematic structural component flow diagram of a multi-dimensional balanced magnetic field measurement system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a state-of-use electrical connection for a magnetic field sensing array provided in accordance with an embodiment of the present invention;
FIG. 3 is an isometric view of a magnetic field sensing array provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of an axial view of a magnetic induction probe and its structure and material according to an embodiment of the present invention;
FIG. 5 is an isometric view of a magnetic field induction coil provided in accordance with an embodiment of the present invention;
fig. 6 is a flowchart of a multi-dimensional balanced magnetic field measurement method according to an embodiment of the present invention.
Wherein, 1-magnetic field sensing array, 2-measure the high-frequency cable;
10-insulating frame, 11-shielding shell, 12-magnetic field induction coil, and 13-output port.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
In a first aspect, referring to fig. 1 to 5, the present application provides a multi-dimensional balanced magnetic field measurement system comprising: the device comprises a magnetic field sensing array 1, a parallel module, an active integration module, a data acquisition unit, a photoelectric conversion module and calculation analysis software which are electrically connected in sequence; the magnetic field sensing array 1 is used for generating a plurality of magnetic field differential signals in a magnetic field to be detected; the parallel module is used for carrying out mean processing on a plurality of magnetic field differential signals generated in each magnetic field induction array; the active integration module is used for integrating the magnetic field differential signal and reducing the magnetic field differential signal into an analog signal; the data acquisition unit is used for acquiring the analog signals and converting the analog signals into digital signals; the photoelectric conversion module is used for converting the digital signal into an optical signal; the calculation and analysis software is used for carrying out analysis and calculation on preset parameters and algorithms for installing the optical signals, drawing a change curve of the measured magnetic field, and solving time parameters and amplitude parameters of the measured magnetic field.
In the present embodiment, the magnetic field sensing array 1 is configured to receive magnetic lines and convert a magnetic field signal into a magnetic field differential signal (electrical signal), and the magnetic field sensing array 1 includes: the insulating outer frame body 10 is of a circular ring structure, and a plurality of radial slots are formed in the outer wall surface of the insulating outer frame body 10; and the magnetic field induction probes are detachably connected in the slots. The slots are uniformly arranged along the circumference of the insulating outer frame 10, and a magnetic field induction probe can be installed in each slot. It should be understood that the magnetic field sensing probes are distributed in a circumferential array in the circumferential direction of the insulating outer frame 10 to measure the magnetic field at each point.
Referring to fig. 4 and 5, the magnetic field induction probe includes: a shield case 11; the magnetic field induction coil 12 is arranged in the shielding shell 11, and a lead at one end of the magnetic field induction coil 12 penetrates out of the shielding shell 11; the side all around of shield shell 11 is the metal copper structure, and two fronts of shield shell 11 are the insulating material structure, and the purpose of setting up shield shell 11 is, and the circumference of guaranteeing magnetic field induction coil 12 is the metal copper structure to shield among the horizontal magnetic field entering magnetic field induction coil 12. And the output port 13 is arranged on the shielding shell 11 and is connected with one end of the magnetic field induction coil 12 penetrating out of the shielding shell 11. On the insulating outer frame 10, the magnetic flux receiving surface of the magnetic field induction coil 12 is on the same circumference and is perpendicular to the circumference, the direction of the magnetic field generated in the current direction is also a circle, and the direction of the magnetic field and the direction of the circumference are concentric circles, so that the magnetic field induction coil 12 can be ensured to be completely crossed with the magnetic field to be measured, and the measurement sensitivity is greatly improved.
In this embodiment, the magnetic field induction coil 12 is an enameled wire spiral coil wound with a preset number of turns, the more turns of the winding finger, the higher the measurement sensitivity, and the larger the winding area, the higher the measurement sensitivity. The output port 13 is a BNC interface, and each magnetic field sensing probe is connected to the parallel module through a high-frequency measuring cable 2, so that the magnetic field differential signal generated by the magnetic field sensing array 1 is transmitted to the parallel module without distortion.
In this embodiment, each of the slots has a plurality of detents, and the detents in each of the slots are sequentially arranged along a radial direction of the insulating outer frame 10; each magnetic field induction probe can be clamped on the corresponding clamping position in sequence. The purpose is, guaranteed that the distance between each magnetic field inductive probe and insulating outer frame 10 axle center can be adjusted, ensured to measure the proportionality coefficient.
In an alternative embodiment, the measurement scale factor can also be adjusted by providing insulating outer frames 10 of different sizes.
And a plurality of slots are circumferentially arranged on the insulating outer frame body 10, and a plurality of magnetic field induction probes can be installed, so that the measurement dimension is guaranteed. The measurement dimension and the measurement proportionality coefficient ensure the measurement accuracy. Correspondingly, according to the required measurement dimension and the measurement proportionality coefficient, the insulating outer frame body 10 with the appropriate size can be determined and selected, and the corresponding groups of magnetic field induction probes clamped in the insulating outer frame body 10 can be determined.
The optical signals after the photoelectric conversion module is subjected to quasi-conversion are transmitted to the calculation analysis software through the optical fibers, so that the phenomenon that high-frequency oscillation is superimposed on waveforms due to refraction and reflection of a longer connecting cable is eliminated, and the signals are guaranteed not to be distorted.
In this embodiment, a method for measuring a multi-dimensional balanced magnetic field is also applied, and an operation procedure of the multi-dimensional balanced magnetic field measurement system is specifically described.
Referring to fig. 1 to 6, a multi-dimensional balanced magnetic field measuring method includes: step one, mounting a magnetic field induction probe on an insulating outer frame body 10; step two, the insulating outer frame body 10 is annularly arranged on the impulse current conducting rod to be tested, so that the impulse current conducting rod to be tested is coaxial with the insulating outer frame body 10; electrically connecting the magnetic field sensing array 1, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software in sequence; and fourthly, presetting parameters and algorithms in the computer analysis software, drawing a magnetic field change curve, and solving time parameters and amplitude parameters of the measured magnetic field.
In the first step, the method for mounting the magnetic field induction probe on the insulating outer frame 10 includes: acquiring the size of the impulse current to be measured and the measuring environment; selecting a preset number of magnetic field probes to be uniformly installed on the insulating outer frame body 10, and installing each magnetic field probe on a corresponding gear of the slot, or selecting the insulating outer frame body 10 with a proper size.
The multidimensional balanced magnetic field measurement system and the multidimensional balanced magnetic field measurement method adopt the magnetic field sensing array 1 to be used for measuring various transient magnetic fields, the magnetic field sensing array 1 can be selected according to the size of the measured impact current and the measurement environment, a plurality of point magnetic fields can be effectively detected, the measurement proportionality coefficient is fixed through the average value of all directions of the magnetic fields to be measured output by the multidimensional balanced magnetic field measurement system, and the accuracy of magnetic field measurement is guaranteed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. A multi-dimensional balanced magnetic field measurement system, comprising:
the magnetic field sensing array, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software are electrically connected in sequence;
the magnetic field sensing array is used for generating a plurality of magnetic field differential signals in a magnetic field to be measured;
the parallel module is used for carrying out mean processing on a plurality of magnetic field differential signals generated in each magnetic field induction array;
the active integration module is used for integrating the magnetic field differential signal and reducing the magnetic field differential signal into an analog signal;
the data acquisition unit is used for acquiring the analog signals and converting the analog signals into digital signals;
the photoelectric conversion module is used for converting the digital signal into an optical signal;
the calculation and analysis software is used for carrying out analysis and calculation on preset parameters and algorithms for installing the optical signals, drawing a change curve of the measured magnetic field, and solving time parameters and amplitude parameters of the measured magnetic field.
2. The multi-dimensional balanced magnetic field measurement system of claim 1, wherein the magnetic field sensing array is connected to the parallel modules via a measurement high frequency cable.
3. The multi-dimensional balanced magnetic field measurement system of claim 1, wherein the magnetic field sensing array comprises:
the insulating outer frame body is of a circular ring structure, and the outer wall surface of the insulating outer frame body is provided with a plurality of radial slots;
and the magnetic field induction probes are detachably connected in the slots.
4. The multi-dimensional balanced magnetic field measurement system of claim 3, wherein the magnetic field sensing probe comprises:
a shield case;
the magnetic field induction coil is arranged in the shielding shell, and a lead at one end of the magnetic field induction coil penetrates out of the shielding shell;
and the output port is arranged on the shielding shell and is connected with one end of the magnetic field induction coil penetrating out of the shielding shell.
5. The multi-dimensional balanced magnetic field measurement system according to claim 3, wherein the slots of the insulating outer frame are uniformly arranged along the circumference of the insulating outer frame.
6. The multi-dimensional balanced magnetic field measurement system according to claim 3, wherein each of the slots has a plurality of detents therein, and the detents in each of the slots are sequentially arranged along a radial direction of the insulating outer frame;
each magnetic field induction probe can be clamped on the corresponding clamping position in sequence.
7. The multi-dimensional balanced magnetic field measurement system of claim 4, wherein the output port is a BNC interface.
8. The multi-dimensional balanced magnetic field measurement system according to claim 4, wherein the magnetic field induction coil is a spiral coil of enameled wire wound with a predetermined number of turns.
9. A multi-dimensional balanced magnetic field measurement method, comprising:
step one, mounting a magnetic field induction probe on an insulating outer frame body;
secondly, arranging an insulating outer frame body ring on the impact current conducting rod to be detected to enable the impact current conducting rod to be detected to be coaxial with the insulating outer frame body;
electrically connecting the magnetic field sensing array, the parallel module, the active integration module, the data acquisition unit, the photoelectric conversion module and the calculation analysis software in sequence;
and fourthly, presetting parameters and algorithms in the computer analysis software, drawing a magnetic field change curve, and solving time parameters and amplitude parameters of the measured magnetic field.
10. The method according to claim 9, wherein in the first step, the method for mounting the magnetic field induction probe on the insulating outer frame body comprises:
acquiring the size of the impulse current to be measured and the measuring environment;
and selecting a preset number of the magnetic field probes to be uniformly installed on the insulating outer frame body, and installing the magnetic field probes on corresponding gears of the slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011320082.XA CN112526417A (en) | 2020-11-23 | 2020-11-23 | Multi-dimensional balanced magnetic field measurement system and method |
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| CN202011320082.XA CN112526417A (en) | 2020-11-23 | 2020-11-23 | Multi-dimensional balanced magnetic field measurement system and method |
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| CN112526417A true CN112526417A (en) | 2021-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740582A (en) * | 2021-07-27 | 2021-12-03 | 中国电力科学研究院有限公司 | Magnetic field induction coil group for multi-dimensional balance magnetic field measurement, magnetic field sensing array and measurement system |
| CN114019428A (en) * | 2021-11-09 | 2022-02-08 | 广东电网有限责任公司电力科学研究院 | GIL shell magnetic field measuring device |
-
2020
- 2020-11-23 CN CN202011320082.XA patent/CN112526417A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740582A (en) * | 2021-07-27 | 2021-12-03 | 中国电力科学研究院有限公司 | Magnetic field induction coil group for multi-dimensional balance magnetic field measurement, magnetic field sensing array and measurement system |
| CN113740582B (en) * | 2021-07-27 | 2024-09-20 | 中国电力科学研究院有限公司 | Magnetic field induction coil set, magnetic field sensing array and measuring system for measuring multidimensional balanced magnetic field |
| CN114019428A (en) * | 2021-11-09 | 2022-02-08 | 广东电网有限责任公司电力科学研究院 | GIL shell magnetic field measuring device |
| CN114019428B (en) * | 2021-11-09 | 2023-05-23 | 广东电网有限责任公司电力科学研究院 | GIL (gas insulated switchgear) shell magnetic field measuring device |
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