Three-dimensional electric field vector and magnetic field vector measuring device

Abstract

The invention relates to a three-dimensional electric field vector and magnetic field vector measuring device, and relates to the technical field of electromagnetic field measurement. The device comprises an electric field sensing unit and a magnetic field sensing unit, the electric field sensing unit comprises a first cubic structure and capacitor plates respectively arranged on each surface of the first cubic structure, so that two capacitor plates on opposite surfaces form an electric field capacitor; the magnetic field sensing unit comprises a second cube structure and magnetic field sensors arranged on the surfaces of the second cube structure respectively, the two magnetic field sensors located on the opposite surfaces are symmetrically arranged, and sensitive axes of the two magnetic field sensors located on the opposite surfaces point to opposite directions. Three-dimensional magnetic field intensity and electric field intensity in three orthogonal directions are obtained through the electric field sensing unit and the magnetic field sensing unit; and the measurement precision is high and is not easily influenced by the environment temperature.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic field measurement, and in particular to a three-dimensional electric field vector and magnetic field vector measurement device. Background Art

[0002] When measuring electromagnetic fields, accurate and stable acquisition of electric and magnetic field information is crucial for many applications.

[0003] For electric field measurement, traditional methods usually rely on capacitor plates configured in a specific direction to sense electric field changes. However, since the capacitor plates are usually only aimed at a single direction, the comprehensiveness and accuracy of electric field measurements are limited. In addition, changes in ambient temperature often affect the performance of the capacitor, resulting in temperature errors in the measurement results.

[0004] In terms of magnetic field measurement, traditional technologies usually use single or multiple magnetic field sensors to capture magnetic field strength. However, these sensors can only provide magnetic field information in a single direction or a specific plane, which makes it difficult to fully reflect the three-dimensional characteristics of the magnetic field. In addition, changes in ambient temperature can also cause temperature errors in the measurement results. Summary of the invention

[0005] In view of this, the present invention aims to provide a three-dimensional electric field vector and magnetic field vector measurement device.

[0006] This is to solve the problem in the prior art that the measurement of electric field and magnetic field is incomplete and greatly affected by the environment.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] The present invention provides a three-dimensional electric field vector and magnetic field vector measurement device, comprising an electric field sensing unit and a magnetic field sensing unit;

[0009] The electric field sensing unit comprises a first cubic structure and capacitor plates respectively arranged on each surface of the first cubic structure, so that two capacitor plates on opposite surfaces form an electric field capacitor;

[0010] The magnetic field sensing unit includes a second cubic structure and magnetic field sensors respectively arranged on each surface of the second cubic structure. The two magnetic field sensors on opposite surfaces are symmetrically arranged and the sensitive axes of the two magnetic field sensors on opposite surfaces point in opposite directions.

[0011] Furthermore, the magnetic field sensor is selected from one of a fluxgate and a magnetic induction coil.

[0012] Further, the three-dimensional electric field vector and magnetic field vector measuring device also includes at least one electric field measurement circuit;

[0013] The electric field measuring circuit is used to measure the electric field voltage at both ends of an electric field capacitor formed by two capacitor plates on opposite surfaces.

[0014] Further, the electric field measurement circuit includes a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first amplifier;

[0015] One end of the electric field capacitor is connected to one end of the first capacitor, one end of the first resistor, and one end of the second resistor, and the other end of the electric field capacitor is grounded;

[0016] The other end of the first capacitor and the other end of the first resistor are grounded;

[0017] The other end of the second resistor is connected to the non-inverting input end of the first amplifier;

[0018] The inverting input terminal of the first amplifier is connected to one end of the third resistor, one end of the fourth resistor, and one end of the second capacitor;

[0019] The other end of the third resistor is grounded;

[0020] The other end of the fourth resistor and the other end of the second capacitor are connected to the output end of the first amplifier and one end of the fifth resistor respectively; the other end of the fifth resistor is configured as the output end of the electric field measurement circuit.

[0021] Further, the three-dimensional electric field vector and magnetic field vector measuring device also includes at least one magnetic field measuring circuit;

[0022] The magnetic field measuring circuit is used to measure the total induced electromotive force of two magnetic field sensors located on opposite surfaces.

[0023] Further, the magnetic field measurement circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a third capacitor, and a second amplifier;

[0024] One end of one of the two magnetic field sensors on opposite surfaces is connected to one end of a sixth resistor, and the other end is grounded; the other end of the sixth resistor is connected to one end of a third capacitor, one end of a ninth capacitor, and an inverting input end of a second operational amplifier; the other end of the third capacitor and the other end of the ninth resistor are connected to the output end of the second operational amplifier and one end of a tenth resistor, and the other end of the tenth resistor is configured as the output end of the magnetic field measurement circuit;

[0025] One end of the other of the two magnetic field sensors on the opposite surfaces is connected to one end of the seventh resistor and one end of the eighth resistor, and the other end is grounded; the other end of the seventh resistor is grounded, and the other end of the eighth resistor is connected to the in-phase input terminal of the second amplifier.

[0026] Furthermore, the three-dimensional electric field vector and magnetic field vector measuring device also includes a microcontroller;

[0027] The microcontroller is used to read the electric field voltage at both ends of the electric field capacitor formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit, and calculate the electric field strength; and read the total induced electromotive force between two magnetic field sensors on opposite surfaces measured by the magnetic field measurement circuit, and calculate the magnetic field strength.

[0028] Furthermore, the three-dimensional electric field vector and magnetic field vector measuring device further includes a display unit;

[0029] The microcontroller is provided with a Bluetooth module and / or an optical fiber communication module to transmit the electric field strength and the magnetic field strength to the display unit for display via Bluetooth transmission mode and / or optical fiber transmission mode.

[0030] Furthermore, the calculating the electric field strength includes:

[0031] According to formula 1

[0032]

[0033] Calculate E(t) as the electric field strength, where U1(t) is the electric field voltage across the electric field capacitor formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit; C s is an electric field capacitor; S is the effective area of ​​two capacitor plates on opposite surfaces; ε is a preset dielectric constant.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] The present invention adopts a first cubic structure through an electric field sensing unit, and capacitor plates are respectively arranged on each surface thereof, so that two capacitor plates on opposite surfaces can form an electric field capacitor. This design enables the device to simultaneously measure electric field information from multiple directions, achieving three-dimensional coverage of electric field measurement. Since the capacitor plates are evenly distributed on each surface of the cube, the directional consistency and symmetry of the electric field measurement are significantly improved, ensuring the accuracy and reliability of the measurement results.

[0036] The magnetic field sensing unit also adopts a cubic structure, and a magnetic field sensor is set on each surface. The two magnetic field sensors on opposite surfaces are symmetrically arranged, and the sensitive axes of the two magnetic field sensors on opposite surfaces point in opposite directions. This design enables the device to capture the magnetic field strength from three orthogonal directions at the same time, and accurately calculate the direction of the magnetic field based on this.

[0037] In the present invention, magnetic field sensing units are placed on the six surfaces of a cubic device. The six magnetic field sensing units adopt a differential output mode. Two magnetic field sensing units are grouped together, one positive and one negative, respectively attached to the opposite surfaces of the regular hexahedron (the sensitive axes point in opposite directions). The output signal is twice that of a single amplifier, so the output signal has a small zero drift and reduces the temperature error caused by the change of the test environment temperature. This structure can obtain the magnetic field strength in three orthogonal directions.

[0038] Compared with the traditional three measurement units, the device of the present invention adopts six capacitor plates and six magnetic field sensors arranged on a cube, and these measurement units are evenly distributed on the cube structure. Similarly, the magnetic field sensor is similar in principle and will not be elaborated. This design significantly improves the consistency and symmetry of the device in the measurement direction. For example, in the electric field measurement, the capacitor plates in two opposite directions can measure the same electric field at the same time, and the measurement results are basically the same. This consistency and symmetry optimization makes the device more accurate and reliable in measurements in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is a structural schematic diagram of an electric field sensing unit of the electric field vector and magnetic field vector measuring device of the present invention;

[0041] Figure 2 It is a structural schematic diagram of a magnetic field sensing unit of the electric field vector and magnetic field vector measuring device of the present invention;

[0042] Figure 3 It is a schematic diagram of the structure of the electric field capacitor of the present invention;

[0043] Figure 4 A circuit diagram of an electric field measurement circuit of the present invention;

[0044] Figure 5 A circuit diagram of a magnetic field measuring circuit of the present invention;

[0045] Figure 6 It is a schematic diagram of the structure of Bluetooth communication or optical fiber communication of the present invention.

[0046] Description of reference numerals:

[0047] 1. Electric field sensing unit; 11. First cubic structure; 12. Capacitor plate; 2. Magnetic field sensing unit; 21. Second cubic structure; 22. Magnetic field sensor. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0049] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connected", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0051] The following will refer to the attached Figures 1 to 6 The present invention is described in detail with reference to embodiments.

[0052] In general, the present invention provides a three-dimensional electric field vector and magnetic field vector measurement device, comprising an electric field sensing unit 1 and a magnetic field sensing unit 2;

[0053] like Figure 1 As shown, the electric field sensing unit 1 includes a first cubic structure 11 and capacitor plates respectively arranged on each surface of the first cubic structure 11, so that two capacitor plates on opposite surfaces form an electric field capacitor Cs;

[0054] like Figure 2 As shown, the magnetic field sensing unit 2 includes a second cubic structure 21 and magnetic field sensors 22 respectively arranged on each surface of the second cubic structure 21. The two magnetic field sensors 22 on opposite surfaces are symmetrically arranged and the sensitive axes of the two magnetic field sensors 22 on opposite surfaces point in opposite directions.

[0055] The present invention adopts a first cubic structure 11 through the electric field sensing unit 1, and arranges capacitor plates on each surface thereof, so that two capacitor plates on opposite surfaces can form an electric field capacitor Cs. This design enables the device to simultaneously measure electric field information from multiple directions, achieving three-dimensional coverage of electric field measurement. Since the capacitor plates are evenly distributed on each surface of the cube, the directional consistency and symmetry of the electric field measurement are significantly improved, ensuring the accuracy and reliability of the measurement results.

[0056] The magnetic field sensing unit 2 also adopts a cubic structure, and a magnetic field sensor 22 is arranged on each surface thereof. The two magnetic field sensors 22 on opposite surfaces are arranged symmetrically with each other, and the sensitive axes of the two magnetic field sensors 22 on opposite surfaces point in opposite directions. This design enables the device to capture the magnetic field strength from three orthogonal directions at the same time, and accurately calculate the direction of the magnetic field based on this.

[0057] In the present invention, magnetic field sensing units 2 are placed on the six surfaces of a cubic device. The six magnetic field sensing units 2 adopt a differential output mode. Two magnetic field sensing units 2 are grouped together, one positive and one negative, respectively attached to the opposite surfaces of the regular hexahedron (the sensitive axes point in opposite directions). The output signal is twice that of a single amplifier, so the output signal zero drift is small, and the temperature error caused by the change of the test environment temperature is reduced. This structure can obtain the magnetic field strength in three orthogonal directions.

[0058] Compared with the three traditional measuring units, the device of the present invention adopts six capacitor plates and six magnetic field sensors 22 arranged on a cube, and these measuring units are evenly distributed on the cube structure. Similarly, the magnetic field sensor 22 is similar in principle, and no further elaboration is given. This design significantly improves the consistency and symmetry of the device in the measuring direction. For example, in the electric field measurement, the capacitor plates in two opposite directions can measure the same electric field at the same time, and the measurement results are basically the same. This consistency and symmetry optimization makes the device more accurate and reliable in measurements under complex environments.

[0059] In a possible embodiment, the magnetic field sensor 22 is selected from one of a fluxgate and a magnetic induction coil.

[0060] In this embodiment, the fluxgate is a magnetic field measuring element that can be used in current measurement with high precision. The fluxgate magnetometer is a magnetic field sensor 22 of a vector magnetic field that can distinguish less than one tenth of the earth's magnetic field. A magnetic induction coil, also called an electromagnet coil or an electromagnetic coil, is a conductor coil, usually composed of a plurality of coils.

[0061] In a possible embodiment, the electric field vector and magnetic field vector measuring device further includes at least one electric field measuring circuit;

[0062] The electric field measuring circuit is used to measure the electric field voltage across the electric field capacitor Cs formed by two capacitor plates on opposite surfaces.

[0063] In a possible embodiment, Figure 4 As shown, the electric field measurement circuit includes a first capacitor C1, a second capacitor C2, a first resistor R1, a first resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first amplifier AMP1;

[0064] One end of the electric field capacitor Cs is connected to one end of the first capacitor C1, one end of the first resistor R1, and one end of the first resistor R2, and the other end of the electric field capacitor Cs is grounded;

[0065] The other end of the first capacitor C1 and the other end of the first resistor R1 are grounded;

[0066] The other end of the first resistor R2 is connected to the non-inverting input end of the first amplifier AMP1;

[0067] An inverting input terminal of the first amplifier AMP1 is connected to one end of the third resistor R3, one end of the fourth resistor R4, and one end of the second capacitor C2;

[0068] The other end of the third resistor R3 is grounded;

[0069] The other end of the fourth resistor R4 and the other end of the second capacitor C2 are connected to the output end of the first amplifier AMP1 and one end of the fifth resistor R5 respectively; the other end of the fifth resistor R5 is configured as the output end of the electric field measurement circuit.

[0070] In a possible embodiment, the electric field vector and magnetic field vector measuring device further includes at least one magnetic field measuring circuit;

[0071] In this embodiment, the number of magnetic field measurement circuits is preferably three, and the three magnetic field measurement circuits measure the total induced electromotive force of two magnetic field sensors 22 on opposite surfaces in the X, Y, and Z directions respectively.

[0072] The magnetic field measuring circuit is used to measure the total induced electromotive force of two magnetic field sensors 22 located on opposite surfaces.

[0073] In another embodiment, the number of the magnetic field measurement circuit is one, and the total induced electromotive force of two magnetic field sensors 22 on opposite surfaces in the X, Y, and Z directions is measured respectively by multiplexing.

[0074] In a possible embodiment, Figure 5As shown, the magnetic field measurement circuit includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a third capacitor C3, and a second amplifier AMP2;

[0075] One end of one of the two magnetic field sensors 22 on the opposite surfaces is connected to one end of the sixth resistor R6, and the other end is grounded; the other end of the sixth resistor R6 is connected to one end of the third capacitor C3, one end of the ninth capacitor, and the inverting input end of the second operational amplifier; the other end of the third capacitor C3 and the other end of the ninth resistor R9 are connected to the output end of the second operational amplifier and one end of the tenth resistor R10, and the other end of the tenth resistor R10 is configured as the output end of the magnetic field measurement circuit;

[0076] One end of the other of the two magnetic field sensors 22 on the opposite surfaces is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8, and the other end is grounded; the other end of the seventh resistor R7 is grounded, and the other end of the eighth resistor R8 is connected to the in-phase input terminal of the second amplifier AMP2.

[0077] In a possible embodiment, the electric field vector and magnetic field vector measuring device further includes a microcontroller;

[0078] The microcontroller is used to read the electric field voltage across the electric field capacitor Cs formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit, and calculate the electric field strength; and read the total induced electromotive force between the two magnetic field sensors 22 on opposite surfaces measured by the magnetic field measurement circuit, and calculate the magnetic field strength.

[0079] The calculated magnetic field strength includes:

[0080] According to formula 2

[0081]

[0082] The magnetic field intensity H(t) is calculated, where N is the number of turns of the coil in the magnetic field sensor 22; A is the area of ​​the coil in the magnetic field sensor 22; and U2(t) is the total induced electromotive force.

[0083] In a possible embodiment, the electric field vector and magnetic field vector measuring device further includes a display unit;

[0084] The microcontroller is provided with a Bluetooth module and / or an optical fiber communication module to transmit the electric field strength and the magnetic field strength to the display unit for display via Bluetooth transmission mode and / or optical fiber transmission mode.

[0085] In a possible embodiment, calculating the electric field strength includes:

[0086] According to formula 1

[0087]

[0088] E(t) is calculated as the electric field strength, where U1(t) is the electric field voltage across the electric field capacitor Cs formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit; S is the effective area of ​​the two capacitor plates on opposite surfaces; and ε is the preset dielectric constant.

[0089] like Figure 3 As shown, the reasoning process of formula 1 is:

[0090] The upper and lower plates are connected to the sampling capacitor C s The two ends of the plate are connected, and the induced charge of the plate is on the sampling capacitor C s The voltage signal generated on the output signal is expressed as formula 3:

[0091]

[0092] From Gauss's theorem, we know that there is induced charge on the metal plate in the electric field E, and the surface density of the induced charge is σ, where ε is the dielectric constant of the medium between the plates. The change in the intensity of the measured electric field causes the change in the number of induced charges, that is, Formula 4:

[0093] Q(t)=∫σ(t)dS=εE(t)S

[0094] Where Q(t) is the induced charge of the plate, E(t) is the measured electric field strength, and S is the effective area of ​​the induction plate.

[0095] Substituting formula 4 into formula 3, we can get formula 1

[0096] From Formula 1, it can be known that the electric field strength at the measurement position can be obtained by sampling the voltage across the sampling capacitor Cs.

[0097] In a specific embodiment, capacitor plates are placed on the six surfaces of the first cubic structure 11, thereby forming three mutually orthogonal capacitors to measure the electric field strength in three orthogonal directions, and the direction of the electric field is calculated based on this, and the magnitude and direction of the electric field are calibrated based on this. Figure 1 shown.

[0098] In this embodiment, the sensor as a whole (cube) is as small as possible, and the direction is decoupled to obtain the field strength in the direction; the field strength is synthesized; a fluxgate or a magnetic induction coil is used as a magnetic field sensing element. Since the magnetic field around the high-voltage line is an alternating magnetic field, fluxgates or magnetic induction coils are placed on the six surfaces of a first cubic device in the present invention, and the six fluxgates or magnetic induction coils adopt a differential output mode, and each pair of two fluxgates or magnetic induction coils with the same sensitivity is a group, one positive and one negative are respectively attached to the opposite surfaces of the regular hexahedron, that is, symmetrically distributed on the X, Y, and Z axes of the probe, equidistant from point O, and the output signal is twice that of a single amplifier, so that the output signal has a small zero drift, and at the same time reduces the temperature error caused by the change of the test environment temperature. This structure can obtain the magnetic field strength in three orthogonal directions, and calculate the direction of the magnetic field based on this.

[0099] The 6 measurement units (the electric field measurement unit is a capacitor plate, and the magnetic field measurement unit is a fluxgate or magnetic induction coil) have better consistency and symmetry in the measurement direction than the conventional 3 measurement units. For example, the measurement results of the same electric field in the X+ and X- directions are basically the same. There is no certain difference in the conventional three units.

[0100] like Figure 6 As shown, in this embodiment, communication can be carried out through Bluetooth or optical fiber, and Bluetooth or optical fiber communication can reduce interference with electric field measurement.

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-dimensional electric field vector and magnetic field vector measuring device, characterized in that: comprising an electric field sensing unit and a magnetic field sensing unit; The electric field sensing unit comprises a first cubic structure and capacitor plates respectively arranged on each surface of the first cubic structure, so that two capacitor plates on opposite surfaces form an electric field capacitor; The magnetic field sensing unit includes a second cubic structure and magnetic field sensors respectively arranged on each surface of the second cubic structure. The two magnetic field sensors on opposite surfaces are symmetrically arranged and the sensitive axes of the two magnetic field sensors on opposite surfaces point in opposite directions.

2. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 1, characterized in that: The magnetic field sensor is selected from one of a fluxgate and a magnetic induction coil.

3. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 1, characterized in that: The three-dimensional electric field vector and magnetic field vector measuring device further comprises at least one electric field measuring circuit; The electric field measuring circuit is used to measure the electric field voltage at both ends of an electric field capacitor formed by two capacitor plates on opposite surfaces.

4. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 3, characterized in that: The electric field measurement circuit includes a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first amplifier; One end of the electric field capacitor is connected to one end of the first capacitor, one end of the first resistor, and one end of the second resistor, and the other end of the electric field capacitor is grounded; The other end of the first capacitor and the other end of the first resistor are grounded; The other end of the second resistor is connected to the non-inverting input end of the first amplifier; The inverting input terminal of the first amplifier is connected to one end of the third resistor, one end of the fourth resistor, and one end of the second capacitor; The other end of the third resistor is grounded; The other end of the fourth resistor and the other end of the second capacitor are connected to the output end of the first amplifier and one end of the fifth resistor respectively; the other end of the fifth resistor is configured as the output end of the electric field measurement circuit.

5. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 3, characterized in that: The three-dimensional electric field vector and magnetic field vector measuring device further comprises at least one magnetic field measuring circuit; The magnetic field measuring circuit is used to measure the total induced electromotive force of two magnetic field sensors located on opposite surfaces.

6. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 5, characterized in that: The magnetic field measurement circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a third capacitor, and a second amplifier; One end of one of the two magnetic field sensors on opposite surfaces is connected to one end of a sixth resistor, and the other end is grounded; the other end of the sixth resistor is connected to one end of a third capacitor, one end of a ninth capacitor, and an inverting input end of a second operational amplifier; the other end of the third capacitor and the other end of the ninth resistor are connected to the output end of the second operational amplifier and one end of a tenth resistor, and the other end of the tenth resistor is configured as the output end of the magnetic field measurement circuit; One end of the other of the two magnetic field sensors on the opposite surfaces is connected to one end of the seventh resistor and one end of the eighth resistor, and the other end is grounded; the other end of the seventh resistor is grounded, and the other end of the eighth resistor is connected to the in-phase input terminal of the second amplifier.

7. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 5, characterized in that: The three-dimensional electric field vector and magnetic field vector measuring device also includes a microcontroller; The microcontroller is used to read the electric field voltage at both ends of the electric field capacitor formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit, and calculate the electric field strength; The total induced electromotive force between two magnetic field sensors on opposite surfaces measured by the magnetic field measurement circuit is read to calculate the magnetic field strength.

8. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 7, characterized in that: The three-dimensional electric field vector and magnetic field vector measuring device also includes a display unit; The microcontroller is provided with a Bluetooth module and / or an optical fiber communication module to transmit the electric field strength and the magnetic field strength to the display unit for display via Bluetooth transmission mode and / or optical fiber transmission mode.

9. The three-dimensional electric field vector and magnetic field vector measuring device according to claim 7, characterized in that: The electric field strength obtained by calculation includes: According to formula 1 Calculate E(t) as the electric field strength, where U1(t) is the electric field voltage across the electric field capacitor formed by two capacitor plates on opposite surfaces measured by the electric field measurement circuit; C s is an electric field capacitor; S is the effective area of ​​two capacitor plates on opposite surfaces; ε is a preset dielectric constant.

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