CN111679229B - Method and system for three-dimensional calibration of three-dimensional electric field measuring device - Google Patents
Method and system for three-dimensional calibration of three-dimensional electric field measuring device Download PDFInfo
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- CN111679229B CN111679229B CN202010333090.1A CN202010333090A CN111679229B CN 111679229 B CN111679229 B CN 111679229B CN 202010333090 A CN202010333090 A CN 202010333090A CN 111679229 B CN111679229 B CN 111679229B
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Abstract
The invention discloses a method and a system for three-dimensional calibration of a three-dimensional electric field measuring device, wherein the three-dimensional electric field measuring device to be calibrated is respectively placed in a parallel polar plate synthetic electric field calibrating device in a first state and a second state, and unit voltage is loaded so as to respectively obtain a field intensity measuring direction value and a field intensity measuring total value of the three-dimensional electric field measuring device; respectively calculating a field strength theoretical direction value and a field strength theoretical total value of the three-dimensional electric field measuring device in a first state and a second state; and determining the coupling coefficients in the three directions according to the field intensity measurement direction value, the field intensity measurement total value, the field intensity theoretical direction value and the field intensity theoretical total value. The three-dimensional electric field measuring device can realize the simultaneous calibration of three dimensions of the three-dimensional electric field measuring device without adding an electric field generating device, obtains the coupling coefficients among the three dimensions, improves the calibration efficiency and solves the problem of the coupling decoupling calibration among the three dimensions.
Description
Technical Field
The present invention relates to the field of electromagnetic measurement and calibration techniques, and more particularly, to a method and system for three-dimensional calibration of a three-dimensional electric field measurement device.
Background
The existing synthetic electric field calibration device is formed by adopting large parallel polar plates, and a sensor to be calibrated is usually placed in a uniform field, so that the direction of an electric field is perpendicular to the sensor, and the sensor can be calibrated in a single dimension. If the three-dimensional sensor needs to be calibrated, the sensor needs to be calibrated one by one after being rotated in 3 directions. Although the calibration method can perform independent calibration on 3 dimensions of the measuring device, the coupling relation among the three dimensions cannot be given, and the application range of the sensor is limited.
Therefore, how to calibrate the three-dimensional electric field measuring device in 3 dimensions simultaneously based on the existing large parallel plate composite electric field calibrating device is a problem which needs to be solved urgently.
Disclosure of Invention
The invention provides a method and a system for three-dimensional calibration of a three-dimensional electric field measuring device, which are used for solving the problem of how to carry out three-dimensional calibration on the three-dimensional electric field measuring device.
In order to solve the above problems, according to an aspect of the present invention, there is provided a method for three-dimensional calibration of a three-dimensional electric field measuring apparatus, the three-dimensional electric field measuring apparatus having a cubic structure, and three surfaces on which any vertex is located are an X surface, a Y surface, and a Z surface for measuring field strengths in three directions of X, Y, and Z, respectively; the method comprises the following steps:
placing a three-dimensional electric field measuring device to be calibrated in a parallel polar plate synthetic electric field calibrating device in a first state, and loading unit voltage in the parallel polar plate synthetic electric field calibrating device to respectively obtain a first field intensity measuring direction value and a first field intensity measuring total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction; wherein the first state is: setting two surfaces of an X surface, a Y surface and a Z surface to form a first preset angle with a parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
calculating a first field intensity theoretical direction value and a first field intensity theoretical total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a first state;
placing the three-dimensional electric field measuring device in a parallel polar plate synthetic electric field calibration device in a second state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device to respectively obtain a second field intensity measuring direction value and a second field intensity measuring total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction; wherein the second state is: setting the other two surfaces of the X surface, the Y surface and the Z surface to form a first preset angle with the parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
calculating a second field strength theoretical direction value and a second field strength theoretical total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction under a second state;
and determining the coupling coefficients of the three directions according to the first field strength measurement direction value, the first field strength theoretical direction value, the second field strength measurement direction value, the second field strength theoretical direction value, the first field strength measurement total value, the first field strength theoretical total value, the second field strength measurement total value and the second field strength theoretical total value of the three directions x, y and z.
Preferably, wherein said first preset angle is 45 °; the second preset angle is 90 °.
Preferably, the determining the coupling coefficients in the three directions according to the first field strength measurement direction value, the first field strength theoretical direction value, the second field strength measurement direction value, the second field strength theoretical direction value, the first field strength measurement total value, the first field strength theoretical total value, the second field strength measurement total value and the second field strength theoretical total value in the x, y and z directions includes:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values of the first field strength in x, y and z directions, respectively, E all measured Measuring a total value for the first field strength; e xi theory of motion 、E Theory of yi And E zi theory of First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the second field strength; e xi theory of motion 、E Theory of yi And E zi theory of Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively all theory of The theoretical total value of the second field strength.
According to another aspect of the present invention, there is provided a system for three-dimensional calibration of a three-dimensional electric field measuring apparatus, the three-dimensional electric field measuring apparatus has a cubic structure, and three surfaces where any vertex is located are an X surface, a Y surface, and a Z surface for measuring field intensities in X, Y, and Z directions, respectively; the system comprises:
the device comprises a first field intensity measurement value acquisition module, a second field intensity measurement value acquisition module and a third field intensity measurement module, wherein the first field intensity measurement value acquisition module is used for placing a three-dimensional electric field measurement device to be calibrated in a parallel polar plate synthetic electric field calibration device in a first state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device so as to respectively acquire a first field intensity measurement direction value and a first field intensity measurement total value in the x direction, the y direction and the z direction measured by the three-dimensional electric field measurement device; wherein the first state is: setting two surfaces of an X surface, a Y surface and a Z surface to form a first preset angle with a parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
the first field strength theoretical value calculating module is used for calculating first field strength theoretical direction values and first field strength theoretical total values of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a first state;
the second field intensity measurement value acquisition module is used for placing the three-dimensional electric field measurement device in a parallel polar plate synthetic electric field calibration device in a second state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device so as to respectively acquire a second field intensity measurement direction value and a second field intensity measurement total value in the x direction, the y direction and the z direction measured by the three-dimensional electric field measurement device; wherein the second state is: setting the other two surfaces of the X surface, the Y surface and the Z surface to form a first preset angle with the parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
the second field intensity theoretical value calculating module is used for calculating second field intensity theoretical direction values and second field intensity theoretical total values of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a second state;
and the coupling coefficient determining module is used for determining the coupling coefficients of the three directions according to the first field strength measuring direction value, the first field strength theoretical direction value, the second field strength measuring direction value, the second field strength theoretical direction value, the first field strength measuring total value, the first field strength theoretical total value, the second field strength measuring total value and the second field strength theoretical total value of the three directions.
Preferably, wherein said first preset angle is 45 °; the second preset angle is 90 °.
Preferably, the coupling coefficient determining module is specifically configured to:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values of the first field strength in x, y and z directions, respectively, E all i measurement Measuring a total value for the first field strength; e xi theory of motion 、E Theory of yi And E zi theory of motion First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all measured Measuring a total value for the second field strength; e xi theory of 、E Theory of yi And E zi theory of motion Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively all theory of The theoretical total value of the second field strength.
The invention provides a method and a system for three-dimensional calibration of a three-dimensional electric field measuring device, which are based on the existing large parallel polar plate synthetic electric field calibrating device, and can realize the simultaneous calibration of three dimensions of the three-dimensional electric field measuring device by using the idea of changing the placement angle of a sensor under the condition of not adding an electric field generating device, and simultaneously obtain the coupling coefficients among the three dimensions; compared with the prior art, the three-dimensional electric field measurement device can calibrate three dimensions simultaneously only by changing the position of the three-dimensional electric field measurement device, so that the calibration efficiency is improved, and the problem of coupling decoupling calibration among the three dimensions is solved.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow chart of a method 100 for three-dimensional calibration of a three-dimensional electric field measurement device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a three-dimensional electric field measuring apparatus according to an embodiment of the present invention in a first state;
FIG. 3 is a schematic view of a three-dimensional electric field measuring apparatus according to an embodiment of the present invention in a second state;
FIG. 4 is a schematic diagram of a system 400 for three-dimensional calibration of a three-dimensional electric field measurement device, according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including 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. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
FIG. 1 is a flow chart of a method 100 for three-dimensional calibration of a three-dimensional electric field measurement device according to an embodiment of the present invention. As shown in fig. 1, the method for three-dimensionally calibrating a three-dimensional electric field measurement device according to the embodiment of the present invention is based on an existing large parallel plate synthesized electric field calibration device, and can simultaneously calibrate three dimensions of the three-dimensional electric field measurement device without adding an electric field generation device by using the idea of changing the placement angle of a sensor, and obtain coupling coefficients between the three dimensions; compared with the prior art, the three-dimensional electric field measurement device can calibrate three dimensions simultaneously only by changing the position of the three-dimensional electric field measurement device, so that the calibration efficiency is improved, and the problem of coupling decoupling calibration among the three dimensions is solved.
In an embodiment of the present invention, the three-dimensional electric field measuring apparatus has a cubic structure, and three surfaces where any vertex is located are an X surface, a Y surface, and a Z surface for measuring field intensities in three directions of X, Y, and Z, respectively.
In the method 100 for three-dimensional calibration of a three-dimensional electric field measurement device according to an embodiment of the present invention, starting from step 101, in step 101, a three-dimensional electric field measurement device to be calibrated is placed in a parallel plate combined electric field calibration device in a first state, and a unit voltage is loaded in the parallel plate combined electric field calibration device, so as to obtain a first field strength measurement direction value and a first field strength measurement total value in three directions, namely x, y, and z, measured by the three-dimensional electric field measurement device, respectively; wherein the first state is: two faces of the X face, the Y face and the Z face are all set to form a first preset angle with the parallel polar plate, and the rest one face and the parallel polar plate form a second preset angle.
In step 102, a first field strength theoretical direction value and a first field strength theoretical total value of the three directions x, y and z of the three-dimensional electric field measuring device in the first state are calculated.
In step 103, placing the three-dimensional electric field measuring device in a parallel polar plate synthetic electric field calibration device in a second state, and loading a unit voltage in the parallel polar plate synthetic electric field calibration device to respectively obtain a second field intensity measuring direction value and a second field intensity measuring total value of the three directions x, y and z measured by the three-dimensional electric field measuring device; wherein the second state is: the other two surfaces of the X surface, the Y surface and the Z surface are arranged to form a first preset angle with the parallel polar plate, and the rest one surface and the parallel polar plate form a second preset angle.
In step 104, a second field strength theoretical direction value and a second field strength theoretical total value of the three directions x, y and z of the three-dimensional electric field measuring device in the second state are calculated.
Preferably, wherein said first preset angle is 45 °; the second preset angle is 90 °.
In the embodiment of the present invention, the combination relationship between the X-plane, the Y-plane, and the Z-plane and the positions between the parallel plates can be classified into the following three types: the X surface and the Y surface form an angle of 45 degrees with the parallel polar plate, the Z surface forms an angle of 90 degrees with the parallel polar plate, the X surface and the Z surface form an angle of 45 degrees with the parallel polar plate, the Y surface forms an angle of 90 degrees with the parallel polar plate, the Y surface and the Z surface form an angle of 45 degrees with the parallel polar plate, and the X surface and the parallel polar plate form an angle of 90 degrees; wherein, the surface vertical to the parallel polar plate is parallel to the direction of the electric field E. Two of the three states are randomly selected to be set as a first state and a second state.
Fig. 2 is a schematic view of a three-dimensional electric field measuring apparatus according to an embodiment of the present invention in a first state. As shown in fig. 2, in the embodiment of the present invention, a three-dimensional electric field measurement device to be calibrated is placed in a uniform domain of a large parallel plate combined electric field calibration device, an X plane and a Y plane are selected to form 45 ° with the parallel plate, a Z plane is selected to form 90 ° with the parallel plate, and a unit voltage is loaded in the parallel plate combined electric field calibration device to perform measurement in a first state, so as to obtain a first field strength measurement direction value and a first field strength measurement total value in three directions of X, Y, and Z measured by the three-dimensional electric field measurement device. And removing the loaded unit voltage after the measurement is finished, and adjusting the position of the three-dimensional electric field measuring device to measure in a second state.
In the first state, the theoretical direction value of the first field strength and the theoretical total value of the first field strength in the x, y and z directions can be calculated as follows:
fig. 3 is a schematic view of a three-dimensional electric field measuring apparatus according to an embodiment of the present invention in a second state. As shown in fig. 3, in the embodiment of the present invention, the three-dimensional electric field measurement device to be calibrated is placed in the uniform domain of the large parallel plate combined electric field calibration device, the X plane and the Z plane are selected to form 45 ° with the parallel plate, the Y plane is selected to form 90 ° with the parallel plate, and a unit voltage is loaded in the parallel plate combined electric field calibration device to perform measurement in the second state, so as to obtain the second field strength measurement direction value and the second field strength measurement total value in the X, Y, and Z directions measured by the three-dimensional electric field measurement device.
In the second state, the theoretical direction value of the second field strength and the theoretical total value of the second field strength in the x, y and z directions can be calculated and obtained as follows:
in step 105, the coupling coefficients in the three directions are determined according to the first field strength measurement direction value, the first field strength theoretical direction value, the second field strength measurement direction value, the second field strength theoretical direction value, the first field strength measurement total value, the first field strength theoretical total value, the second field strength measurement total value and the second field strength theoretical total value in the three directions x, y and z.
Preferably, the determining the coupling coefficients in the three directions according to the first field strength measurement direction value, the first field strength theoretical direction value, the second field strength measurement direction value, the second field strength theoretical direction value, the first field strength measurement total value, the first field strength theoretical total value, the second field strength measurement total value and the second field strength theoretical total value in the x, y and z directions includes:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values of the first field strength in x, y and z directions, respectively, E all i measurement Measuring a total value for the first field strength; e xi theory of 、E Theory of yi And E zi theory of motion First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the second field strength; e xi theory of motion 、E Theory of yi And E zi theory of motion Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively all theory of The theoretical total value of the second field strength.
The embodiment of the invention utilizes the uniform field to carry out three-dimensional calibration on the three-dimensional electric field measuring device, and utilizes the idea of changing the placement angle of the sensor to realize the simultaneous calibration of three dimensions of the three-dimensional electric field measuring device under the condition of not adding an electric field generating device, thereby solving the problem of coupling decoupling calibration among the three dimensions.
FIG. 4 is a schematic diagram of a system 400 for three-dimensional calibration of a three-dimensional electric field measurement device, according to an embodiment of the present invention. As shown in fig. 4, a system 400 for three-dimensional calibration of a three-dimensional electric field measurement apparatus according to an embodiment of the present invention includes: a first field strength measurement value acquisition module 401, a first field strength theoretical value calculation module 402, a second field strength measurement value acquisition module 403, a second field strength theoretical value calculation module 404 and a coupling coefficient determination module 405. The three-dimensional electric field measuring device is of a cubic structure, and three surfaces where any vertex is located are an X surface, a Y surface and a Z surface which are used for measuring field intensity in the X direction, the Y direction and the Z direction respectively.
Preferably, the first field strength measurement value obtaining module 401 is configured to place the three-dimensional electric field measurement device to be calibrated in a parallel plate combined electric field calibration device in a first state, and load a unit voltage in the parallel plate combined electric field calibration device to obtain a first field strength measurement direction value and a first field strength measurement total value in three directions, namely x, y, and z, measured by the three-dimensional electric field measurement device, respectively; wherein the first state is: two faces of the X face, the Y face and the Z face are all set to form a first preset angle with the parallel polar plate, and the rest one face and the parallel polar plate form a second preset angle.
Preferably, the first field strength theoretical value calculating module 402 is configured to calculate a first field strength theoretical direction value and a first field strength theoretical total value of the three-dimensional electric field measurement apparatus in the x, y, and z directions in the first state.
Preferably, the second field strength measurement value obtaining module 403 is configured to place the three-dimensional electric field measurement device in a second state in a parallel plate combined electric field calibration device, and load a unit voltage in the parallel plate combined electric field calibration device, so as to obtain a second field strength measurement direction value and a second field strength measurement total value in the x direction, the y direction and the z direction measured by the three-dimensional electric field measurement device, respectively; wherein the second state is: the other two surfaces of the X surface, the Y surface and the Z surface are arranged to form a first preset angle with the parallel polar plate, and the rest one surface and the parallel polar plate form a second preset angle.
Preferably, the second field strength theoretical value calculating module 404 is configured to calculate a second field strength theoretical direction value and a second field strength theoretical total value of the three-dimensional electric field measurement apparatus in the x direction, the y direction and the z direction in the second state.
Preferably, wherein said first preset angle is 45 °; the second preset angle is 90 °.
Preferably, the coupling coefficient determining module 405 is configured to determine the coupling coefficients in the three directions according to a first field strength measurement direction value, a first field strength theoretical direction value, a second field strength measurement direction value, a second field strength theoretical direction value, a first field strength measurement total value, a first field strength theoretical total value, a second field strength measurement total value, and a second field strength theoretical total value in the x, y, and z directions.
Preferably, the coupling coefficient determining module 405 is specifically configured to:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values of the first field strength in x, y and z directions, respectively, E all i measurement Measuring a total value for the first field strength; e xi theory of motion 、E Theory of yi And E zi theory of First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the second field strength; e xi theory of 、E Theory of yi And E zi theory of motion Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively alliTheory of the invention Is the theoretical total value of the second field strength.
The system 400 for three-dimensional calibration of a three-dimensional electric field measurement apparatus according to an embodiment of the present invention corresponds to the method 100 for three-dimensional calibration of a three-dimensional electric field measurement apparatus according to another embodiment of the present invention, and is not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the ones disclosed above are equally possible within the scope of these appended patent claims, as these are known to those skilled in the art.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (4)
1. The method for three-dimensional calibration of the three-dimensional electric field measurement device is characterized in that the three-dimensional electric field measurement device is of a cubic structure, and three surfaces where any vertex is located are an X surface, a Y surface and a Z surface which are used for measuring field intensity in X, Y and Z directions respectively; the method comprises the following steps:
placing a three-dimensional electric field measuring device to be calibrated in a parallel polar plate synthetic electric field calibrating device in a first state, and loading unit voltage in the parallel polar plate synthetic electric field calibrating device to respectively obtain a first field intensity measuring direction value and a first field intensity measuring total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction; wherein the first state is: setting two surfaces of an X surface, a Y surface and a Z surface to form a first preset angle with a parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
calculating a first field intensity theoretical direction value and a first field intensity theoretical total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a first state;
placing the three-dimensional electric field measuring device in a parallel polar plate synthetic electric field calibration device in a second state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device to respectively obtain a second field intensity measuring direction value and a second field intensity measuring total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction; wherein the second state is: setting the other two surfaces of the X surface, the Y surface and the Z surface to form a first preset angle with the parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
calculating a second field intensity theoretical direction value and a second field intensity theoretical total value of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a second state;
determining coupling coefficients of three directions according to a first field strength measurement direction value, a first field strength theoretical direction value, a second field strength measurement direction value, a second field strength theoretical direction value, a first field strength measurement total value, a first field strength theoretical total value, a second field strength measurement total value and a second field strength theoretical total value of the three directions, wherein the steps comprise:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of first field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the first field strength; e xi theory of motion 、E Theory of yi And E zi theory of the design reside inTheory of the invention First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the second field strength; e xi theory of 、E Theory of yi And E zi theory of motion Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively all theory of Is the theoretical total value of the second field strength.
2. The method according to claim 1, characterized in that said first preset angle is 45 °; the second preset angle is 90 °.
3. A system for three-dimensional calibration of a three-dimensional electric field measuring device is characterized in that the three-dimensional electric field measuring device is of a cubic structure, and three surfaces where any vertex is located are an X surface, a Y surface and a Z surface for measuring field intensity in X, Y and Z directions respectively; the system comprises:
the device comprises a first field intensity measurement value acquisition module, a second field intensity measurement value acquisition module and a third field intensity measurement module, wherein the first field intensity measurement value acquisition module is used for placing a three-dimensional electric field measurement device to be calibrated in a parallel polar plate synthetic electric field calibration device in a first state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device so as to respectively acquire a first field intensity measurement direction value and a first field intensity measurement total value in the x direction, the y direction and the z direction measured by the three-dimensional electric field measurement device; wherein the first state is: setting two surfaces of an X surface, a Y surface and a Z surface to form a first preset angle with a parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
the first field intensity theoretical value calculating module is used for calculating first field intensity theoretical direction values and first field intensity theoretical total values of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a first state;
the second field intensity measurement value acquisition module is used for placing the three-dimensional electric field measurement device in a parallel polar plate synthetic electric field calibration device in a second state, and loading unit voltage in the parallel polar plate synthetic electric field calibration device so as to respectively acquire a second field intensity measurement direction value and a second field intensity measurement total value in the x direction, the y direction and the z direction measured by the three-dimensional electric field measurement device; wherein the second state is: setting the other two surfaces of the X surface, the Y surface and the Z surface to form a first preset angle with the parallel polar plate, and setting the rest one surface to form a second preset angle with the parallel polar plate;
the second field strength theoretical value calculating module is used for calculating second field strength theoretical direction values and second field strength theoretical total values of the three-dimensional electric field measuring device in the x direction, the y direction and the z direction in a second state;
a coupling coefficient determining module for determining the coupling coefficients of the three directions according to a first field strength measuring direction value, a first field strength theoretical direction value, a second field strength measuring direction value, a second field strength theoretical direction value, a first field strength measuring total value, a first field strength theoretical total value, a second field strength measuring total value and a second field strength theoretical total value of the three directions,
the coupling coefficient determination module is specifically configured to:
wherein α is a coupling coefficient; when i is 1, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values of the first field strength in x, y and z directions, respectively, E all i measurement Measuring a total value for the first field strength; e xi theory of motion 、E Theory of yi And E zi theory of motion First field strength theoretical direction values in x, y and z directions, respectively, E all theory of Is a first field strength theoretical total value; when i is 2, E xi actual measurement 、E Actual measurement of yi And E zi actual measurement Measuring direction values, E, of second field strengths in three directions, x, y and z, respectively all i measurement Measuring a total value for the second field strength; e xi theory of 、E Theory of yi And E zi theory of motion Theoretical direction values of the second field strength, E, in the x, y and z directions, respectively all theory of The theoretical total value of the second field strength.
4. The system according to claim 3, characterized in that said first preset angle is 45 °; the second preset angle is 90 °.
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