CN212008762U - Radial electric field induction device of electrostatic field vector sensor - Google Patents
Radial electric field induction device of electrostatic field vector sensor Download PDFInfo
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- CN212008762U CN212008762U CN201922371800.5U CN201922371800U CN212008762U CN 212008762 U CN212008762 U CN 212008762U CN 201922371800 U CN201922371800 U CN 201922371800U CN 212008762 U CN212008762 U CN 212008762U
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Abstract
The utility model discloses a radial electric field induction system of electrostatic field vector sensor. Belongs to the field of electrostatic field measuring instruments; the device comprises a cylindrical electrostatic field vector sensor, wherein three groups of metal induction electrodes in orthogonal directions are arranged on the electrostatic field vector sensor; and a circular Z-direction electrode perpendicular to the axial direction of the cylinder is arranged at the top of the electrostatic field vector sensor, the Z-direction electrode is fixed at the top of the electrostatic field vector sensor through a circular ring, a radial electric field detection electrode is arranged on the side surface of the Z-direction electrode, the radial electric field detection electrode comprises a group of X-direction electrodes and a group of Y-direction electrodes, and the X-direction electrodes and the Y-direction electrodes are used for detecting the electrostatic field in the radial direction of the electrostatic field vector sensor. The utility model discloses an improve radial electric field induction electrode design, radial whole electric field lines in make full use of measuring point place space, the output signal of reinforcing sensor to radial electric field improves the SNR, enlarges horizontal electric field detection range.
Description
Technical Field
The utility model relates to an electrostatic field vector measuring device, concretely relates to determines electrostatic field intensity and electrostatic field direction through the three-dimensional electric field component of quadrature of measuring the electrostatic field, belongs to electrostatic field measuring instrument field.
Background
The electrostatic field sensor is widely applied and has important functions in the fields of lightning early warning, military target detection, industrial electrostatic protection, electric power communication and the like. The main method for measuring the electrostatic field is theoretically divided into two measuring methods based on electricity and optics, the method based on electricity is based on the principle of electrostatic induction to measure, metal induces induction charges in the electrostatic field to form pulse current, and in order to realize continuous measurement, a field grinding type structure or a vibration structure is adopted to modulate the electrostatic field. The optical-based method can be theoretically divided into a Kerr method, a Pockels method and an electrostrictive effect method, and the method measures an electrostatic field by utilizing the change of physical properties of a sensor material under the action of an electric field.
Electrostatic field measurements are mostly measurements of the electric field strength, i.e. one-dimensional electric field measurements, measuring only the total effect of the electric field in the air in the vertical direction, and in addition there are few three-dimensional electric field sensors that can measure the three orthogonal components of the electric field in the air. The existing three-dimensional sensors are generally designed into a cylindrical shape, and sensing units are arranged in the axial direction and the radial direction to carry out three-dimensional electric field measurement, but the radial sensing units are generally only arranged with 2 pairs and 4 pieces, only half area of the side surface of the cylindrical shape is used, and radial electric field signals are not fully utilized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an increase vector electric field sensor radial electric field induced signal intensity improves the SNR, improves sensitivity, enlarges radial electric field detection scope.
The technical scheme of the utility model is that: the radial electric field induction device of the electrostatic field vector sensor comprises a cylindrical electrostatic field vector sensor, wherein three groups of metal induction electrodes in orthogonal directions are arranged on the electrostatic field vector sensor;
a circular Z-direction electrode perpendicular to the axial direction of the cylinder is arranged at the top of the electrostatic field vector sensor and fixed at the top of the electrostatic field vector sensor through a circular ring,
and the side surface of the sensor is provided with a radial electric field detection electrode, the radial electric field detection electrode comprises a group of X-direction electrodes and a group of Y-direction electrodes, and the X-direction electrodes and the Y-direction electrodes are used for detecting the electrostatic field in the radial direction of the electrostatic field vector sensor.
Furthermore, a hollowed-out metal shielding electrode is arranged outside the electrostatic field vector sensor and comprises a metal area and a hollowed-out area, wherein the metal area is used for shielding an electrostatic field.
Furthermore, a motor is arranged in the electrostatic field vector sensor, a motor shaft of the motor is connected with a metal shielding electrode, one end of the motor shaft is connected with the metal shielding electrode, and the other end of the motor shaft is grounded.
Further, a photoelectric switch is arranged on one side of the Z-direction electrode.
Further, a synchronizing blade is also arranged on the motor shaft.
Furthermore, the Z-direction electrodes are divided into two groups, and each group comprises 4 pieces which are arranged at intervals and distributed in a 45-degree fan shape;
the X-direction electrode and the Y-direction electrode respectively comprise 4 electrodes, the 4 electrodes are arranged according to a rule, and induction signals of every two electrodes are connected into a circuit in a differential mode.
The utility model has the advantages that: the utility model discloses an improve radial electric field induction electrode design, radial whole electric field lines in make full use of measuring point place space, the output signal of reinforcing sensor to radial electric field improves the SNR, enlarges horizontal electric field detection range.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the connection between the structure and the circuit of the radial sensing device of the present invention;
FIG. 3 is a schematic view of the present invention;
in the figure, 1 is an electrostatic field vector sensor, 2 is a circular ring, 3 is a metal shielding electrode, 4 is a Z-direction electrode, 5 is a photoelectric switch, 6 is a synchronous blade, and 7 and 8 are both electrodes.
Detailed Description
The utility model discloses; the following describes the present invention with reference to the accompanying drawings.
As shown in fig. 1, the radial electric field induction device of the electrostatic field vector sensor comprises a cylindrical electrostatic field vector sensor 1, wherein three groups of metal induction electrodes in orthogonal directions are arranged on the electrostatic field vector sensor 1;
the electrostatic field vector sensor 1 is designed to be cylindrical, and is convenient to process and install;
a circular Z-direction electrode 4 which is vertical to the axial direction of the cylinder is arranged on the top of the electrostatic field vector sensor 1, the Z-direction electrode 4 is fixed on the top of the electrostatic field vector sensor 1 through a circular ring 2,
the Z-direction electrodes 4 (axial induction electrodes) are uniformly arranged at the top of the electrostatic field vector sensor 1;
a radial electric field detection electrode is arranged on the side surface of the electrostatic field vector sensor, the radial electric field detection electrode comprises a group of X-direction electrodes and a group of Y-direction electrodes, and the X-direction electrodes and the Y-direction electrodes are used for detecting an electrostatic field in the radial direction of the electrostatic field vector sensor 1;
the radial electric field detection electrode is arranged on the circumferential surface of the electrostatic field vector sensor 1; two sets of orthogonal sensing units are required to be arranged, including one set of X-direction electrodes and one set of Y-direction electrodes.
Further, a hollowed-out metal shielding electrode 3 is arranged outside the electrostatic field vector sensor 1, and the metal shielding electrode 3 comprises a metal area and a hollowed-out area, wherein the metal area is used for shielding an electrostatic field;
the shape proportion of the metal area to the hollow area is 1: 1, 4 fan-shaped 45 degrees of upper surface symmetry fretwork promptly, 4 face of cylinder of 45 degrees of side fretwork correspondingly, and the fretwork shape corresponds with the distribution of response electrode.
Further, a motor is arranged in the electrostatic field vector sensor 1, a motor shaft of the motor is connected with a metal shielding electrode 3, one end of the motor shaft is connected with the metal shielding electrode 3, and the other end of the motor shaft is grounded; the function of the device is to cover the electrode X, Y, Z induction electrodes in the device, and the motor drives the metal shielding electrode 3 to rotate to modulate the electrostatic field so as to carry out continuous measurement of the electrostatic field.
Further, a photoelectric switch 5 is disposed on one side of the Z-direction electrode 4.
Further, a synchronous blade 6 is arranged on the motor shaft;
the photoelectric switch 5 is arranged on the reverse side of the Z-direction electrode 4, the synchronous blade 6 is also arranged on a motor shaft of the motor, the hollowed-out shape of the synchronous blade 6 is the same as that of the metal shielding electrode 3, the bent side edge is short, the synchronous blade rotates synchronously with the metal shielding electrode 3, the metal part of the synchronous blade 6 cuts the light path of the photoelectric switch 5, and the hollowed-out part does not shield the photoelectric switch light path, so that a square wave signal synchronous with a modulation electric field is generated and is used for phase-sensitive detection of the modulation electric field; three electrodes which are arranged orthogonally output three electric field measurement data, and three orthogonal components Ex, Ey and Ez of a space electric field are restored through electric field reconstruction.
Further, the Z-direction electrodes 4 are divided into two groups, and each group of 4 electrodes are arranged at intervals and distributed in a 45-degree fan shape;
the Z-direction electrode 4 is circular and insulated between the two groups; the sensor is fixed on the top of the electrostatic field vector sensor 1 through a circular ring 2, is horizontally placed during working and is responsible for detecting an axial electrostatic field;
the X-direction electrode and the Y-direction electrode respectively comprise 4 electrodes, and the X-direction electrode comprises 4 electrodes 7; the Y-direction electrode comprises 4 electrodes 8; each direction is arranged and divided into 2 groups, the 4 electrodes are arranged according to a rule, and the induction signals of each two electrodes are accessed into the circuit in a differential mode;
the radial electric field detection electrodes are rectangular and are intensively arranged on a large flexible rectangular copper clad plate, the homonymy ends are connected by leads, and the circuit board is bent into an arc shape and is arranged on the cylindrical surface of the electrostatic field vector sensor 1; the axial electrode and the radial electric field detection electrode are axially aligned, so that the square wave provided by the photoelectric switch can be shared for detecting three electric field signals during phase-sensitive detection.
The utility model discloses a theory of operation: the arrangement sequence of the cylindrical surface radial electric field induction electrodes is shown in FIG. 2, Xa1 is connected with Xa2 by a conducting wire, Xb1 is connected with Xb2 by a conducting wire and is an X-direction electrode, Ya1 is connected with Ya2 by a conducting wire, Yb1 is connected with Yb2 by a conducting wire and is a Y-direction electrode; each radial electric field detection electrode is rectangular, is intensively arranged on a large flexible rectangular copper clad plate, is bent into a cylinder during working and is arranged on the cylindrical surface of the electrostatic field vector sensor 1, and 8 radial electric field detection electrodes are distributed in an electrostatic field as shown in figure 3.
In FIG. 3, when the radial electric field detecting electrode is operated, Xa1 is connected with Xa2 to form Xa, Xb1 is connected with Xb2 to form Xb, Ya1 is connected with Ya2 to form Ya, Yb1 is connected with Yb2 to form Yb, and an external electric field E is applied0The direction is in the same direction as the X-direction electrode connecting line, and is orthogonal to the Y-direction electrode connecting line, when the electrostatic field vector sensor 1 works, the metal area and the hollow area 1 of the metal shielding electrode 3: 1, the induction electrodes at a certain moment are arranged to simultaneously shield four electrodes Xa1, Yb1, Xb2 and Ya2, the induction sheet Xb1 exposed in an electric field induces a positive electric field and outputs a positive current, the induction sheet Xa2 induces a negative electric field and outputs a negative current, the induction sheets Xa1 and Xb2 are shielded and outputs signals with opposite polarities to those of the induction sheets exposed in the electric field, namely Xa1 outputs a negative current and Xb2 outputs a positive current, in short, the two induction electrodes Xa outputs a negative current, the two induction electrodes Xb output a positive current and generate signals Xa and Xb, the signals Xa and Xb are connected to a signal processing circuit in a differential mode, and the signals are mutually enhanced, so that subsequent processing is facilitated.
The working condition of the orthogonal Y-direction sensing electrode is different from that of the X-direction, Ya1 senses a positive electric field and outputs a positive current, Yb2 senses a negative electric field and outputs a negative current, the shielded Yb1 outputs a positive current, Ya2 outputs a negative current, Ya1 and Ya2 counteract positive and negative, and Yb1 and Yb2 counteract positive and negative, so that Ya and Yb output is 0, and Ya and Yb are output after difference.
Therefore, under the ideal condition, the induction electrode in the same direction with the external electric field outputs an induction signal, and the induction electrode orthogonal to the direction of the external electric field does not output the induction signal; the radial electric field detection electrode is designed into a differential signal in each direction to be connected into a subsequent circuit, so that the shielding of common-mode interference signals is facilitated, and the signal-to-noise ratio of the signals is enhanced; and the radial electric field detection electrode receives all electric field lines in the 360-degree direction of the circumference to generate output current, so that the output signal intensity of the sensor is enhanced.
The utility model discloses be not limited to above-mentioned embodiment, the all impartial changes and the decoration of doing according to the utility model discloses when produced functional action does not surpass the scope of this scheme, all belong to the utility model discloses a protection scope.
Claims (6)
1. The radial electric field induction device of the electrostatic field vector sensor is characterized by comprising a cylindrical electrostatic field vector sensor, wherein three groups of metal induction electrodes in orthogonal directions are arranged on the electrostatic field vector sensor;
a circular Z-direction electrode perpendicular to the axial direction of the cylinder is arranged at the top of the electrostatic field vector sensor and fixed at the top of the electrostatic field vector sensor through a circular ring,
and the side surface of the sensor is provided with a radial electric field detection electrode, the radial electric field detection electrode comprises a group of X-direction electrodes and a group of Y-direction electrodes, and the X-direction electrodes and the Y-direction electrodes are used for detecting the electrostatic field in the radial direction of the electrostatic field vector sensor.
2. The electrostatic field vector sensor radial electric field induction device according to claim 1, wherein a hollowed-out metal shielding electrode is arranged outside the electrostatic field vector sensor, and the metal shielding electrode comprises a metal area and a hollowed-out area, wherein the metal area is used for shielding an electrostatic field.
3. The electrostatic field vector sensor radial electric field induction device according to claim 1, wherein a motor is installed inside the electrostatic field vector sensor, a metal shielding electrode is connected to a motor shaft of the motor, one end of the motor shaft is connected to the metal shielding electrode, and the other end of the motor shaft is grounded.
4. The electrostatic field vector sensor radial electric field induction device of claim 1, wherein a photoelectric switch is disposed on one side of the Z-direction electrode.
5. The electrostatic field vector sensor radial electric field induction device of claim 3, further comprising a synchronization blade mounted on the motor shaft.
6. The electrostatic field vector sensor radial electric field induction device according to claim 1, wherein the Z-direction electrodes are divided into two groups, each group comprises 4 pieces which are arranged at intervals and distributed in a 45-degree fan shape;
the X-direction electrode and the Y-direction electrode respectively comprise 4 electrodes, the 4 electrodes are arranged according to a rule, and induction signals of every two electrodes are connected into a circuit in a differential mode.
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| CN201922371800.5U CN212008762U (en) | 2019-12-26 | 2019-12-26 | Radial electric field induction device of electrostatic field vector sensor |
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| CN201922371800.5U CN212008762U (en) | 2019-12-26 | 2019-12-26 | Radial electric field induction device of electrostatic field vector sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551355A (en) * | 2021-07-23 | 2021-10-26 | 珠海格力电器股份有限公司 | Electrostatic protection method and device, ionization purification equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551355A (en) * | 2021-07-23 | 2021-10-26 | 珠海格力电器股份有限公司 | Electrostatic protection method and device, ionization purification equipment and storage medium |
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Effective date of registration: 20210926 Address after: 210000 room 401-74, floor 4, building D4, No. 15, Wanshou Road, Jiangbei new area, Nanjing, Jiangsu Patentee after: Nanjing Zhongke Huaxing emergency Technology Research Institute Co.,Ltd. Address before: 210044 No. 219 Ning six road, Jiangbei new district, Nanjing, Jiangsu Patentee before: NANJING University OF INFORMATION SCIENCE & TECHNOLOGY |