CN112067909A - Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor - Google Patents
Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor Download PDFInfo
- Publication number
- CN112067909A CN112067909A CN202010598646.XA CN202010598646A CN112067909A CN 112067909 A CN112067909 A CN 112067909A CN 202010598646 A CN202010598646 A CN 202010598646A CN 112067909 A CN112067909 A CN 112067909A
- Authority
- CN
- China
- Prior art keywords
- probe
- electric field
- motor
- voltage signal
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000523 sample Substances 0.000 title claims abstract description 314
- 230000005684 electric field Effects 0.000 title claims abstract description 248
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 57
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000004364 calculation method Methods 0.000 claims abstract description 25
- 239000007769 metal material Substances 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 37
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 37
- 238000001914 filtration Methods 0.000 claims description 22
- 230000009977 dual effect Effects 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 12
- 150000002500 ions Chemical class 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
- G01R29/14—Measuring field distribution
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses an electric field sensor with a differential double-probe structure and a method and a system for measuring a synthesized electric field thereof, wherein the method comprises the following steps: driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the rotating speeds of the first probe and the second probe are the same; generating a first induced current and a second induced current on the surfaces of the first probe and the second probe respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the lengths of the first probe and the second probe are different, and the first probe and the second probe are not grounded; the first induced current is processed through a first signal processing circuit and converted into a first direct current voltage signal; the second induced current is processed through a second signal processing circuit and converted into a second direct current voltage signal; and obtaining the measurement value of the electric field by utilizing differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal.
Description
Technical Field
The invention relates to the technical field of electric field measurement, in particular to an electric field sensor with a differential double-probe structure and a method and a system for measuring a synthetic electric field of the electric field sensor.
Background
Along with the rapid development of economy, the power consumption of each area is also rapidly increased, and in addition, the distribution problem of geographical positions of each area is solved, the resource allocation of each area also presents a very uneven problem, energy and load are reversely distributed, the supply and demand distances of the existing energy resources are far, and large-scale optimization allocation of the energy needs to be implemented, so that a high-voltage transmission line project with capacity, long distance and low loss is established, the ultrahigh-voltage transmission line project is rapidly developed in recent years, and the electromagnetic field intensity around the transmission line and equipment is inevitably increased along with the continuous improvement of the transmission voltage grade.
Firstly, when the electric transmission line generates corona discharge, the electric field intensity in the environment is greatly increased, and the electric field intensity can cause adverse biological effect and environmental problems; secondly, with the gradual opening of a low-altitude airspace, the low-altitude flight safety accidents caused by the collision of a low-altitude aircraft with a high-voltage transmission cable are more and more, and the navigation safety of the low-altitude airspace is seriously threatened; finally, when measuring the thunderstorm electric field, the existing electric field sensor cannot be applied to airspace measurement due to many limitations caused by grounding measurement.
Meanwhile, the development of the open low-altitude field and the aircraft technology can be expected to realize the high-autonomy automatic inspection technology of the aircraft based on the airspace electric field characteristics of the power transmission line, so that the intelligent and automatic level of the operation and maintenance of the power transmission line is greatly improved, and the operation and maintenance efficiency of the line is greatly improved.
Therefore, there is a need for a sensor to achieve accurate measurement of the spatial electric field.
Disclosure of Invention
The technical scheme of the invention provides an electric field sensor with a differential double-probe structure and a method and a system for measuring a synthesized electric field of the electric field sensor, so as to solve the problem of how to accurately measure an airspace electric field.
In order to solve the above problems, the present invention provides an electric field sensor of a differential dual probe structure and a method for measuring a resultant electric field thereof, the method comprising:
generating a first induced current and a second induced current on surfaces of a first probe of a first motor driven sensor and a second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the lengths of the first probe and the second probe are different, and the first probe and the second probe are not grounded;
converting the first induced current into a first direct current voltage signal; the second induction current is converted into a second direct current voltage signal;
and calculating and acquiring a measurement value of the synthesized electric field by using a differential formula based on the first direct-current voltage signal and the second direct-current voltage signal.
Preferably, before generating the first and second induced currents on the surfaces of the first and second probes of the first and second motor driven sensors, respectively, the method further comprises:
driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the first probe and the second probe start to rotate simultaneously and rotate at the same speed.
Preferably, the first probe of the sensor is driven to rotate in the electric field by a first motor; driving a second probe of the sensor to rotate in the electric field by a second motor, comprising:
outputting a current pulse signal to a motor control circuit through a photoelectric switching tube, converting the received current pulse signal into a control signal through the motor control circuit, and controlling the first motor and the second motor based on the control signal;
a motor shaft of a first motor of the sensor is provided with a first photoelectric coded disc, and a motor shaft of a second motor of the sensor is provided with a second photoelectric coded disc; the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field;
the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
Preferably, converting the first induced current into a first direct current voltage signal and converting the second induced current into a second direct current voltage signal includes:
processing a first induced current through a first signal processing circuit, and converting the first induced current into a first direct current voltage signal; processing a second induction current through a second signal processing circuit, and converting the second induction current into a second direct current voltage signal;
the first signal processing circuit and the second signal processing circuit respectively comprise a primary amplification module, a secondary amplification module and a filtering rectification module;
the primary amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal;
the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module;
and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
Preferably, the obtaining of the measurement value of the synthesized electric field by using a differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal includes:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01total electric field measured for the first probe, E1Resultant electric field measured for the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02total electric field measured for the second probe, E1Resultant electric field measured for the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd an additional electric field E measured by a second probe2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
Based on another aspect of the present invention, the present invention provides an electric field sensor with a differential dual probe structure and a system for measuring a resultant electric field thereof, the system comprising: the device comprises a first probe, a second probe, a first motor, a second motor, a first signal processing circuit and a second signal processing circuit;
generating a first induced current and a second induced current on surfaces of the first probe of a first motor driven sensor and the second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the lengths of the first probe and the second probe are different, and the first probe and the second probe are not grounded;
converting the first induced current into a first direct current voltage signal; the second induction current is converted into a second direct current voltage signal; and calculating and acquiring a measured value of the electric field by using a differential formula based on the first direct-current voltage signal and the second direct-current voltage signal.
Preferably, the system further comprises: a first motor, a second motor;
driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the first probe and the second probe start to rotate simultaneously and rotate at the same speed.
Preferably, the system comprises: the photoelectric switch tube, the motor control circuit, the first photoelectric code disc and the second photoelectric code disc; rotating in an electric field at first probes respectively driving the sensors by a first motor; before the second probe of the sensor is driven to rotate in the electric field by the second motor, the method comprises the following steps:
outputting a current pulse signal to a motor control circuit through a photoelectric switching tube, converting the received current pulse signal into a control signal through the motor control circuit, and controlling the first motor and the second motor based on the control signal;
a motor shaft of a first motor of the sensor is provided with a first photoelectric coded disc, and a motor shaft of a second motor of the sensor is provided with a second photoelectric coded disc; the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field;
the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
Preferably, the first signal processing circuit and the second signal processing circuit each include a first-stage amplification module, a second-stage amplification module and a filtering rectification module;
converting the first induced current into a first direct current voltage signal and the second induced current into a second direct current voltage signal, comprising:
processing a first induced current through a first signal processing circuit, and converting the first induced current into a first direct current voltage signal; processing a second induction current through a second signal processing circuit, and converting the second induction current into a second direct current voltage signal;
the primary amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal;
the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module;
and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
Preferably, the obtaining of the measurement value of the synthesized electric field by using a differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal includes:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01total electric field measured for the first probe, E1Resultant electric field measured for the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02total electric field measured for the second probe, E1Resultant electric field measured for the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd measured by a second probeAdditional electric field E2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
The technical scheme of the invention provides an electric field sensor with a differential double-probe structure and a method and a system for measuring a synthesized electric field thereof, wherein the method comprises the following steps: driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; generating a first induced current and a second induced current on the surfaces of the first probe and the second probe respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the first probe and the second probe are different in length, and the first probe and the second probe are not grounded; the first induced current is processed through a first signal processing circuit and converted into a first direct current voltage signal; the second induced current is processed through a second signal processing circuit and converted into a second direct current voltage signal; and calculating and acquiring a measured value of the electric field by using a differential formula based on the first direct-current voltage signal and the second direct-current voltage signal. The technical scheme of the invention solves the problem that the existing electric field sensor cannot measure an airspace electric field in an ion flow field, designs the electric field sensor with double probes based on the cylindrical electric field sensor, and provides a method for measuring a hollow-domain synthetic electric field in an ion flow electric field. The technical scheme of the invention solves the problem of inaccurate measurement caused by charge accumulation of the traditional electric field sensor probe in an ion flow field, eliminates the influence of the accumulated space charge by utilizing double-probe differential processing, and realizes the measurement of a space domain synthetic electric field in an ion flow field.
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 an electric field sensor with a differential dual probe structure and a method for measuring a resultant electric field thereof according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the induced electric field of a dual probe according to a preferred embodiment of the present invention;
FIG. 3 is a mechanical block diagram of a dual probe electric field sensor in accordance with a preferred embodiment of the present invention;
FIG. 4 is a block diagram of an electric field sensor of a differential dual probe configuration and a measurement system for its resultant electric field, in accordance with a preferred embodiment of the present invention; and
fig. 5 is a measurement schematic diagram of a dual probe electric field sensor according to a preferred 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 an electric field sensor with a differential dual probe structure and a method for measuring a resultant electric field thereof according to a preferred embodiment of the present invention. The electromagnetic environment parameters of the ultra-high voltage direct current transmission line during operation mainly comprise a synthetic electric field, ion current density, a magnetic field, audible noise and radio interference. When an extra-high voltage direct current transmission line runs, ions (or charges) generated by corona of a conducting wire can diffuse to the space, the diffused charges are accumulated on the surface of the electric field sensor, an additional electric field can be generated around the sensor, the measurement result of the sensor can be inaccurate, and the traditional electric field sensor cannot measure an airspace electric field. Aiming at the problem that the existing electric field sensor can not measure the airspace electric field in the ion flow field, the invention designs a double-probe electric field sensor based on a cylindrical electric field sensor and provides a method for measuring the airspace synthetic electric field in the ion flow field.
As shown in fig. 1, the present invention provides an electric field sensor with a differential dual probe structure and a method for measuring a resultant electric field thereof, the method comprising:
preferably, the first probe of the sensor is driven to rotate in the electric field by a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the first probe and the second probe start to rotate simultaneously and rotate at the same speed.
Preferably, in step 101: generating a first induced current and a second induced current on surfaces of a first probe of a first motor driven sensor and a second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the first probe and the second probe are different in length, and the first probe and the second probe are not grounded.
Preferably, at step 102: converting the first induced current into a first direct current voltage signal; the second induced current is converted into a second direct current voltage signal.
Preferably, in step 103: and obtaining a measurement value of the synthesized electric field by utilizing differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal.
Preferably, the first induced current is processed by a first signal processing circuit and converted into a first direct current voltage signal; the second induced current is processed through a second signal processing circuit and converted into a second direct current voltage signal; and obtaining the measurement value of the electric field by utilizing differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal.
Preferably, the first signal processing circuit and the second signal processing circuit both comprise a primary amplification module, a secondary amplification module and a filtering rectification module; the first-stage amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal; the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module; and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
Preferably, the first and second probes are 3 mm thick stainless steel, the first probe is 5CM in length and the second probe is 8 CM.
Preferably, the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field; the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
Preferably, the obtaining of the measurement value of the combined electric field by using a differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal includes:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01the total electric field measured by the first probe, E1 the resultant electric field measured by the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02the total electric field measured by the second probe, E1 the resultant electric field measured by the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd an additional electric field E measured by a second probe2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
The invention provides a double-probe structure of a differential electric field sensor, which mainly comprises a double-probe structure, a micro motor, a photoelectric coded disc, a battery pack, a signal processing circuit and a motor rotating speed control circuit. The design of the double-probe structure of the differential electric field sensor is completed based on the Gaussian theorem, when the double-probe structure is placed in an electric field, the probe rotates in the electric field under the driving of a micro motor, the area of the double-probe exposed in the electric field is changed, then the surface of the double-probe generates induced charges, the two parts of the probe are connected to generate induced currents on a connecting line, and the induced currents generated by the two probes can be calculated by utilizing a differential mode to obtain a measured electric field value. As shown in fig. 2. In fig. 2, 1 is a hollow semi-cylinder of the probe, 2 is another hollow semi-cylinder of the probe, 3 is an amplifier, and 4 is a micro motor.
As shown in fig. 3, the dual probe of the differential electric field sensor of the present invention is a cylindrical probe, and the cylinder is a hollow cylindrical thin shell. The two probes of the invention are made of the same material and have the same radius, but the length of the probes is different. The material of the dual probe is preferably a thin walled (3 mm thick) stainless steel tube. The first probe may have a length of 5cm and the second probe may have a length of 8 cm. The first probe and the second probe are driven by the same micro motor to rotate at the same speed. Both probes are powered by the same battery pack. The double probes of the sensor are not grounded. In fig. 3, 5 is a probe, 6 is a sensor fixing part, 7 is a probe, 8 is a photoelectric code disc, 9 is a photoelectric switch tube, 10 is a motor shaft, 11 is a signal processing module, 12 is a micro motor, 13 is a motor rotation speed control module, and 14 is a power supply battery pack.
As shown in fig. 4, the micro-motor of the dual probe structure of the differential electric field sensor of the present invention is fixed to the fixed portion of the sensor. The miniature motor is fixed with a motor shaft, and the two sensor probes are respectively fixed on the two motor shafts. The rotation speed of the micro motor of the present invention may be 500 rpm. The photoelectric coded disc is fixed on the motor shaft of the micro motor. The invention drives the sensor double-probe to rotate in the electric field at the same rotating speed through the micro motor. The photoelectric code disc of the double-probe structure of the differential electric field sensor is fixed on a motor shaft of the sensor. The photoelectric coded disc periodically shields the photoelectric switch tube when being driven by the motor to rotate in an electric field. The photoelectric switch tube is fixed on the fixed part of the sensor and does not rotate along with the motor. The battery pack with the double-probe structure of the differential electric field sensor is a power supply high-capacity battery pack, and is fixed on the fixing part of the electric field sensor. The sensor is powered by the battery mainly for measuring an airspace electric field and avoiding the influence of wiring power supply on the measurement of the space height. The sensor is powered by the battery, so that the phenomenon that the accuracy of a measuring result is influenced by the change of an original electric field due to the fact that the electric field formed by the ground wire is introduced when the sensor is placed in the electric field can be well avoided.
The signal processing circuit of the double-probe structure of the differential electric field sensor mainly comprises a primary amplification module, a secondary amplification module and a filtering rectification module. The first-stage amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal. The two-stage amplification module adopts differential amplification to reduce noise and improve signal-to-noise ratio. The filtering and rectifying module transmits the processed voltage signal to the data acquisition module.
The invention relates to a motor rotating speed control module with a double-probe structure of a differential electric field sensor, which is used for processing current pulses output by a photoelectric switch tube. The current pulse signal is converted and shaped to obtain a feedback value, and a control signal PWM is obtained through processing of the motor rotating speed control module so as to control the rotating speed stability of the motor.
The invention relates to a design-based sensor for measuring a space electric field in the presence of an ion flow field, which comprises the following steps:
the electric field sensor is arranged under an ultra-high voltage transmission line or in a thunderstorm area, the whole electric field sensor is in an ungrounded state, and under the power supply of a battery pack, the micro motor drives the double probes to rotate at a constant speed in the electric field, so that the area of the double probes exposed in the electric field is changed, and two paths of induced currents are generated on the surface of the sensor. And the obtained induced current passes through a signal processing module to obtain two paths of direct current voltage signals. The invention controls the rotating speed of the motor by the pulse output by the photoelectric switch tube and PWM output by the motor rotating speed control module. The electric field value is indirectly measured by carrying out differential processing on the two paths of direct current voltage signals. As shown in fig. 5. In fig. 5, 5 is a probe No. one, 6 is a sensor fixing portion, and 7 is a probe No. two.
Fig. 4 is a structural view of an electric field sensor of a differential dual probe structure and a measurement system of a resultant electric field thereof according to a preferred embodiment of the present invention. As shown in fig. 4, the present invention provides an electric field sensor with a differential dual probe structure and a system for measuring a resultant electric field thereof, wherein the system comprises: the probe comprises a first probe (probe 1), a second probe (probe 2), a first motor, a second motor, a first signal processing circuit and a second signal processing circuit. The invention is exemplified by a generator.
Driving a first probe of the sensor to rotate in an electric field by a first motor, such as a micro motor; driving a second probe of the sensor to rotate in the electric field by a second motor, such as a micro motor; the first probe and the second probe start to rotate at the same time and the rotation speed is the same.
Generating a first induced current and a second induced current on surfaces of a first probe of a first motor driven sensor and a second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the first probe and the second probe are different in length, and the first probe and the second probe are not grounded.
Converting the first induced current into a first direct current voltage signal; the second induced current is converted into a second direct current voltage signal. The first induced current is processed by the first signal processing circuit and converted into a first direct current voltage signal; the second induced current is processed through a second signal processing circuit and converted into a second direct current voltage signal; and obtaining the measurement value of the electric field by utilizing differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal.
Preferably, the system comprises: the photoelectric switch tube, the motor control circuit, the first photoelectric code disc and the second photoelectric code disc; outputting a current pulse signal to a motor control circuit through a photoelectric switching tube, converting the received current pulse signal into a control signal through the motor control circuit, and controlling a first motor and a second motor based on the control signal; a motor shaft of a first motor of the sensor is provided with a first photoelectric coded disc, and a motor shaft of a second motor of the sensor is provided with a second photoelectric coded disc.
Preferably, the first signal processing circuit and the second signal processing circuit both comprise a primary amplification module, a secondary amplification module and a filtering rectification module; the first-stage amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal; the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module; and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
Preferably, the first and second probes are 3 mm thick stainless steel, the first probe is 5CM in length and the second probe is 8 CM.
Preferably, the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field; the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
Preferably, the obtaining of the measurement value of the combined electric field by using a differential calculation based on the first direct-current voltage signal and the second direct-current voltage signal includes:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01total electric field measured for the first probe, E1Resultant electric field measured for the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02total electric field measured for the second probe, E1Resultant electric field measured for the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd an additional electric field E measured by a second probe2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 2, the probe induced electric field schematic diagram of the electric field sensor with the differential dual-probe structure includes a hollow semi-cylinder 1, a hollow semi-cylinder 2, an amplifier 3 and a micro-motor 4 of the probe.
The hollow semi-cylinders 1 and 2 of the two probes are completely consistent in size, length, thickness and material.
The hollow semi-cylinders 1 and 2 of the two probes are fixed at the same position of a motor shaft and rotate with the motor at a constant speed in an electric field.
The surfaces of the hollow semi-cylinders 1 and 2 of the two probes generate induced charges, and the two probes are connected by using a wire, so that induced currents are generated on the wire.
The material of the hollow half cylinders 1 and 2 of the probe is preferably a thin walled (e.g. may be 3 mm thick) stainless steel tube.
As shown in fig. 3, a mechanical structure diagram of an electric field sensor with a differential dual-probe structure provided by the present invention includes a first probe 5, a sensor fixing portion 6, a second probe 7, a photoelectric encoder 8, a photoelectric switch tube 9, a motor shaft 10, a signal processing module 11, a micro motor 12, a motor rotation speed control module 13, and a power supply battery pack 14.
The first probe 5 is fixed on the motor shaft, and the length of the first probe is 5 cm.
The fixed part of the sensor is not rotatable, and a signal processing module 11, a micro motor 12, a motor rotating speed control module 13 and a power supply battery pack 14 are fixed inside the sensor.
The second probe 7 is fixed with the same motor shaft fixed by the first probe 5, and the length of the motor shaft is 8 cm.
The photoelectric coded disc 8 is driven by the micro motor 12 to periodically shield the photoelectric switch tube 9, and the photoelectric switch tube 9 can generate current pulses.
The motor shaft 10 is fixed on the motor, and the first probe 5, the second probe 7 and the photoelectric coded disc 8 are connected on the motor shaft.
And the signal processing module 11 is used for enabling induced current signals generated by the first probe 5 and the second probe 7 to pass through the I-V change module, the secondary amplification module and the filtering rectification module to obtain direct current voltage signals.
The motor speed control module 13 processes the current pulses of the photoelectric switching tube to control the motor.
As shown in FIG. 4, the present invention provides a signal difference block diagram of an electric field sensor with a differential dual-probe structure, which mainly comprises a dual-probe sensing portion, a micro motor driving portion, a photoelectric reference signal portion, a first-stage amplification and filtering rectification portion, and a synthesized electric field calculation portion.
As shown in fig. 5, the present invention provides a measurement schematic diagram of an electric field sensor with a differential dual probe structure, which mainly includes a first probe 5, a sensor fixing part 6 and a second probe 7. When arranging two probe electric field sensor in under the special high voltage transmission line or in the thunderstorm electric field, under the drive of motor, first probe 5 and No. two second probe 7 are rotatory with invariable rotational speed in the electric field, and two probe surfaces will produce induced charge, and wherein the induced charge quantity on first probe 5 surfaces is:
the number of the induced charges on the surface of the second probe 7 is:
wherein,0representing the spatial permittivity, E representing the value of the resultant electric field formed by the nominal electric field and the ion flow field, r representing the radius of the sensor cylinder, L1Represents the length of probe No. 5, L2Representing the length of probe No. two 7.
The induced current generated by the resultant electric field is:
where ω represents the motor speed of the sensor.
It can be seen that the magnitude of the combined electric field is proportional to the measured current, and since the magnitude of the additional electric field is related to the amount of the accumulated electric charges, assuming that the electric fields sensed by the probes are the combined electric field and the additional electric field, since the lengths of the first probe 5 and the second probe 7 are different, the value of the measured combined electric field will not be affected, but the accumulated electric charges will be different if the lengths are different, and the values of the additional electric fields measured by the first probe 5 and the second probe 7 will be different.
The relationship between the additional electric fields formed by the accumulation of free space charge is related to the length of the dual probe of the sensor.
The electric field measured by the first probe 5 is calculated as follows:
E01＝E1+E2a
wherein E is01Total electric field measured by the first probe 5, E1The resultant electric field measured by the first probe 5, probe No. E2aThe additional electric field measured by the first probe No. 5. The calculation formula of the electric field measured by the second probe 7 is as follows:
E02＝E1+E2b
wherein E is02Total electric field measured by the second probe 7 No. two, E1The resultant electric field measured by the second probe 7 No. two, E2bThe additional electric field measured by the second probe No. two 7. When the lengths of the first probe 5 and the second probe 7 are determined, the additional electric field E measured by the first probe 5 is determined2aAnd an additional electric field E measured by a second probe2bCan be determined by the following relationship:
where α is the relationship of the additional electric fields on the dual probes.
In the laboratory, the numerical value E of the synthesized electric field is obtained by measurement1And the total electric field E measured by the first probe 501And the total electric field E measured by the second probe 702The scaling factor of the additional electric field formed by the accumulated charge can then be found by calibration measurements as:
the calculation formula of the measured composite electric field is as follows:
the electric field sensor with a differential dual probe structure and the measurement system of the resultant electric field thereof according to the preferred embodiment of the present invention correspond to the electric field sensor with a differential dual probe structure and the measurement method of the resultant electric field thereof according to another preferred embodiment of the present invention, and are not described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
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: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand 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 (10)
1. An electric field sensor with a differential dual-probe structure and a method for measuring a resultant electric field thereof, wherein the method comprises the following steps:
generating a first induced current and a second induced current on surfaces of a first probe of a first motor driven sensor and a second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the lengths of the first probe and the second probe are different, and the first probe and the second probe are not grounded;
converting the first induced current into a first direct current voltage signal; the second induction current is converted into a second direct current voltage signal;
and calculating and acquiring a measurement value of the synthesized electric field by using a differential formula based on the first direct-current voltage signal and the second direct-current voltage signal.
2. The method of claim 1, further comprising, prior to generating the first and second induced currents at surfaces of the first and second probes of the first and second motor driven sensors, respectively:
driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the first probe and the second probe start to rotate simultaneously and rotate at the same speed.
3. The method of claim 2, wherein the first probe of the sensor is driven to rotate in the electric field by a first motor; driving a second probe of the sensor to rotate in the electric field by a second motor, comprising:
outputting a current pulse signal to a motor control circuit through a photoelectric switching tube, converting the received current pulse signal into a control signal through the motor control circuit, and controlling the first motor and the second motor based on the control signal;
a motor shaft of a first motor of the sensor is provided with a first photoelectric coded disc, and a motor shaft of a second motor of the sensor is provided with a second photoelectric coded disc; the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field;
the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
4. The method of claim 1, converting the first induced current into a first direct voltage signal and the second induced current into a second direct voltage signal, comprising:
processing a first induced current through a first signal processing circuit, and converting the first induced current into a first direct current voltage signal; processing a second induction current through a second signal processing circuit, and converting the second induction current into a second direct current voltage signal;
the first signal processing circuit and the second signal processing circuit respectively comprise a primary amplification module, a secondary amplification module and a filtering rectification module;
the primary amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal;
the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module;
and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
5. The method of claim 1, the obtaining a measurement of a resultant electric field using a differential calculation based on the first and second direct current voltage signals, comprising:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01total electric field measured for the first probe, E1Resultant electric field measured for the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02total electric field measured for the second probe, E1Resultant electric field measured for the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd an additional electric field E measured by a second probe2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
6. An electric field sensor of a differential dual probe structure and a resultant electric field measurement system thereof, the system comprising: the device comprises a first probe, a second probe, a first motor, a second motor, a first signal processing circuit and a second signal processing circuit;
generating a first induced current and a second induced current on surfaces of the first probe of a first motor driven sensor and the second probe of a second motor driven sensor, respectively; the first probe and the second probe are hollow cylinders with the same radius, the first probe and the second probe are made of the same metal material, the lengths of the first probe and the second probe are different, and the first probe and the second probe are not grounded;
converting the first induced current into a first direct current voltage signal; the second induction current is converted into a second direct current voltage signal; and calculating and acquiring a measured value of the electric field by using a differential formula based on the first direct-current voltage signal and the second direct-current voltage signal.
7. The system of claim 6, further comprising: a first motor, a second motor;
driving a first probe of the sensor to rotate in the electric field through a first motor; driving a second probe of the sensor to rotate in the electric field through a second motor; the first probe and the second probe start to rotate simultaneously and rotate at the same speed.
8. The system of claim 7, the system comprising: the photoelectric switch tube, the motor control circuit, the first photoelectric code disc and the second photoelectric code disc; rotating in an electric field at first probes of the first motor-driven sensors, respectively; before the second probe of the sensor is driven to rotate in the electric field by the second motor, the method comprises the following steps:
outputting a current pulse signal to a motor control circuit through a photoelectric switching tube, converting the received current pulse signal into a control signal through the motor control circuit, and controlling the first motor and the second motor based on the control signal;
a motor shaft of a first motor of the sensor is provided with a first photoelectric coded disc, and a motor shaft of a second motor of the sensor is provided with a second photoelectric coded disc; the first photoelectric coded disc is driven by the first motor to periodically shield the photoelectric switch tube when rotating in an electric field;
the second photoelectric coded disc is driven by the second motor to periodically shield the photoelectric switch tube when rotating in an electric field.
9. The system of claim 6, the first signal processing circuit and the second signal processing circuit each comprising a primary amplification module, a secondary amplification module, and a filtering rectification module;
converting the first induced current into a first direct current voltage signal and the second induced current into a second direct current voltage signal, comprising:
processing a first induced current through a first signal processing circuit, and converting the first induced current into a first direct current voltage signal; processing a second induction current through a second signal processing circuit, and converting the second induction current into a second direct current voltage signal;
the primary amplification module is an I-V conversion circuit and realizes the conversion from a current signal to a voltage signal;
the secondary amplification module processes the voltage signal through differential amplification, reduces noise and improves the signal-to-noise ratio, and outputs the processed voltage signal to the filtering rectification module;
and the filtering and rectifying module outputs the processed voltage signal to the data acquisition module.
10. The system of claim 6, the obtaining a measurement of a resultant electric field using a differential calculation based on the first direct current voltage signal and the second direct current voltage signal, comprising:
the calculation formula of the total electric field measured by the first probe is as follows:
E01＝E1+E2a
E01total electric field measured for the first probe, E1Resultant electric field measured for the first probe, E2aAn additional electric field measured for the first probe;
the calculation formula of the total electric field measured by the second probe is as follows:
E02＝E1+E2b
E02total electric field measured for the second probe, E1Resultant electric field measured for the second probe, E2bAn additional electric field measured for the second probe;
additional electric field E measured by the first probe2aAnd an additional electric field E measured by a second probe2bThe relationship of (a) is determined as follows:
where α is the relationship of the additional electric fields of the first and second probes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598646.XA CN112067909A (en) | 2020-06-28 | 2020-06-28 | Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598646.XA CN112067909A (en) | 2020-06-28 | 2020-06-28 | Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112067909A true CN112067909A (en) | 2020-12-11 |
Family
ID=73656440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010598646.XA Pending CN112067909A (en) | 2020-06-28 | 2020-06-28 | Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112067909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117538628A (en) * | 2023-11-10 | 2024-02-09 | 北京中科飞龙传感技术有限责任公司 | Electric field sensing probe for non-invasive monitoring of hard pressure plate voltage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688840A (en) * | 1992-07-24 | 1994-03-29 | Hamamatsu Photonics Kk | Electric field measuring instrument |
| CN101576590A (en) * | 2009-04-03 | 2009-11-11 | 中国人民解放军理工大学 | Miniature electric field measuring apparatus |
| CN206096275U (en) * | 2016-07-27 | 2017-04-12 | 清华大学 | Sensor device for measuring ion-containing current direct current electric field |
| CN108693413A (en) * | 2018-04-25 | 2018-10-23 | 华北电力大学 | Rotary optical electric-field sensor and its measurement electric field methods |
| CN109884411A (en) * | 2019-03-28 | 2019-06-14 | 赵青 | A kind of MEMS space electrical field sensor and measuring system and method |
| CN110208611A (en) * | 2019-05-09 | 2019-09-06 | 湖南大学 | A kind of active three-dimensional impulse electric field field strength meter based on dipole antenna |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
-
2020
- 2020-06-28 CN CN202010598646.XA patent/CN112067909A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688840A (en) * | 1992-07-24 | 1994-03-29 | Hamamatsu Photonics Kk | Electric field measuring instrument |
| CN101576590A (en) * | 2009-04-03 | 2009-11-11 | 中国人民解放军理工大学 | Miniature electric field measuring apparatus |
| CN206096275U (en) * | 2016-07-27 | 2017-04-12 | 清华大学 | Sensor device for measuring ion-containing current direct current electric field |
| CN108693413A (en) * | 2018-04-25 | 2018-10-23 | 华北电力大学 | Rotary optical electric-field sensor and its measurement electric field methods |
| CN109884411A (en) * | 2019-03-28 | 2019-06-14 | 赵青 | A kind of MEMS space electrical field sensor and measuring system and method |
| CN110208611A (en) * | 2019-05-09 | 2019-09-06 | 湖南大学 | A kind of active three-dimensional impulse electric field field strength meter based on dipole antenna |
| CN110288889A (en) * | 2019-07-30 | 2019-09-27 | 新疆工程学院 | A kind of homogeneous half space plane electric fields distribution characteristics experimental provision and experimental method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117538628A (en) * | 2023-11-10 | 2024-02-09 | 北京中科飞龙传感技术有限责任公司 | Electric field sensing probe for non-invasive monitoring of hard pressure plate voltage |
| CN117538628B (en) * | 2023-11-10 | 2024-07-02 | 北京中科飞龙传感技术有限责任公司 | Electric field sensing probe for non-invasive monitoring of hard pressure plate voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112305327B (en) | Field grinding type airspace electric field sensor device and electric field measuring method | |
| CN1129782C (en) | Method and device for automatic detection and control of wind tunnel speed | |
| CN107478196B (en) | Rock-soil layered settlement measurement method and measurement system | |
| CN106595728A (en) | Rotor axial displacement, rotating speed and inclination angle radial integrated measurement method | |
| US5513539A (en) | Apparatus and method for determining the best position for inner and outer members in a rotary machine | |
| CN104914268B (en) | For detecting the device of motor speed | |
| CN202031580U (en) | Active magnetic field calibrator with MWD (measurement while drilling) directional probe | |
| CN105738807A (en) | High-speed dynamic pressure gyro motor ground touch rotating speed test system | |
| CN112067909A (en) | Electric field sensor with differential double-probe structure and method and system for measuring synthetic electric field of electric field sensor | |
| CN104006731A (en) | Centering sensing device and displacement detection method thereof | |
| CN102928713A (en) | Background noise measuring method of magnetic antennas | |
| CN206546377U (en) | A kind of wind direction and wind velocity sensor based on electromagnetic induction principle | |
| CN209214758U (en) | For recognizing the device of shrouded blade dynamic parameter | |
| CN202974422U (en) | Sensor and engineering machinery comprising same | |
| CN202522191U (en) | Magnetic sensor-based device for measuring distance between high voltage line and target object | |
| CN216815747U (en) | Noise detection device based on laser vibration measurement | |
| CN101923152A (en) | Room temperature calibration method for equivalent error area of gradiometer | |
| CN112067910A (en) | Cylindrical airspace electric field sensor and method and system for measuring spatial electric field intensity thereof | |
| CN101358897A (en) | Influence line wireless remote automatic test equipment for bridge structure | |
| CN115980428A (en) | Phase difference-based cable three-phase unbalanced current detection method | |
| CN201945602U (en) | Piston type magnetic transmission and direct reading multifunctional anemometer | |
| CN102221632B (en) | Piston type Maglev transmission direct-reading multifunctional anemograph | |
| CN106953701B (en) | A kind of Internet of Things radio interference source measuring system and method | |
| CN118937174A (en) | Electrostatic induction type dust concentration sensor in-situ self-zeroing device and method | |
| CN2742445Y (en) | Self powered digital tachometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |