CN108445306A - A kind of electric field measurement system and its application method based on FPGA controls - Google Patents
A kind of electric field measurement system and its application method based on FPGA controls Download PDFInfo
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- CN108445306A CN108445306A CN201810271768.0A CN201810271768A CN108445306A CN 108445306 A CN108445306 A CN 108445306A CN 201810271768 A CN201810271768 A CN 201810271768A CN 108445306 A CN108445306 A CN 108445306A
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- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
A kind of electric field measurement system and its application method based on FPGA controls, belong to technical field of electric equipment, and in particular to a kind of electric field measurement system.The present invention is directed to existing defect, provides a kind of measurement and application range of power frequency electric field are big, measure accuracy height, safety good, stable, suitable for high humility and high-temperature electric field measurement system and its application method.In the present invention, FPGA controller receives signal enabling electric-field sensor and Temperature Humidity Sensor, Temperature Humidity Sensor passes humiture information back FPGA controller, electric field signal is passed to signal acquisition circuit by electric-field sensor, signal acquisition circuit is by analog signal through A/D conversion circuits output digit signals to FPGA controller, FPGA controller handles received signal and the data after correction is carried out flash latches, data are sent to host computer simultaneously and are shown, data are sent to handheld terminal by host computer, when data are more than setting value, alarm module starts.Present invention is mainly applied to the electric field measurements of suspension field intensity meter.
Description
Technical field
The invention belongs to technical field of electric equipment, and in particular to a kind of electric field measurement system and its application method.
Background technology
Currently, environmental protection mostly uses suspension field intensity meter to the power frequency electric field measurement of AC power transmission and transformation project, and suspension build is visited
The operation principle of head is the line-frequency induction electricity between the two parts (pole plate) for measuring an isolated conductor for being introduced into tested electric field
Stream and charge inducing, by between two parts capacitance and the circuit that is formed of sample resistance, measure ohmically voltage, obtain power frequency
Induced current obtains the correspondence of electric current and field strength by calibration, and the field intensity meter volume is big, and most field intensity meters use wood
Or epoxy holder, the capacitance and holder that probe itself is constituted directly are contacted with air, at high humidity originally because of holder or probe
The influence of leakage current of experiencing can cause measurement result bigger than normal, measurement result even bigger than normal as many as 50% when serious.Simultaneously because
Holder is larger, and Residents area especially platform size is smaller, is also easy to bring electric field distortion, safety poor.
So, it is necessary to a kind of measurement and application range of power frequency electric field are big, measurement accuracy is high, safety is good, fortune
Row is stablized, suitable for the electric field measurement system and its application method of high humility and high-temperature.
Invention content
The present invention for existing electric field measurement system power frequency electric field measurement and application range it is small, measurement accuracy is low,
Safety is poor, fluctuation of service, is unsuitable for high humility and the defect of high-temperature, provides a kind of measurement and application of power frequency electric field
Range is big, measures accuracy is high, safety is good, it is stable, suitable for high humility and high-temperature electric field measurement system and
Its application method.
The technical solution of a kind of electric field measurement system and its application method based on FPGA controls according to the present invention is such as
Under：
A kind of electric field measurement system based on FPGA controls according to the present invention, it includes electric-field sensor, control electricity
Road, Temperature Humidity Sensor, host computer and handheld terminal, the control circuit include signal acquisition circuit, A/D conversion circuits,
FPGA controller and flash are latched, and the handheld terminal further includes alarm module, and the host computer further includes wireless transmission mould
Block；The host computer is wirelessly connected with handheld terminal, the host computer, handheld terminal, electric-field sensor, Temperature Humidity Sensor,
Flash is latched and A/D conversion circuits are connect with FPGA controller two-phase respectively, the output end connection letter of the electric-field sensor
The input terminal of number Acquisition Circuit, the input terminal of the output end connection A/D conversion circuits of the signal acquisition circuit；
The electric-field sensor further includes No.1 stator, No. two stators, rotor, No.1 sensing chip, No. two sensing chips, letter
Number acquisition system, motor, power supply, electrode plate, pillar, pedestal, X-axis sensitive surface and Y-axis sensitive surface, the X-axis sensitive surface and Y
Axis sensitive surface is set to below No.1 stator and is mutually perpendicular to vertically, and the No.1 stator, No. two stators and rotor are set respectively
There are hollow out, the No.1 sensing chip and No. two sensing chips to be respectively arranged in the hollow out position of No.1 stator and No. two stators, institute
The No.1 stator stated and No. two stator juxtapositions are placed, and ensure that No.1 sensing chip and No. two sensing chips are completely misaligned；It is described
Rotor be located at the tops of two stators, the electrode plate is fixed on the side of rotor and with rotor motion, the No.1
Stator and No. two stators are each attached on pillar, and the pillar is fixed on the base, the rotor and motor axis connection, institute
The motor stated is located on pedestal, and the input terminal of the motor and the input terminal of FPGA controller connect the output of power supply simultaneously
End, the signal acquiring system are bi-directionally connected with power supply, the output end connection signal acquisition system of the FPGA controller
Input terminal, the signal acquiring system output end connect with signal acquisition circuit；
The edge of the No.1 stator, No. two stators, rotor, electrode plate, the edge of X-axis sensitive surface and Y-axis sensitive surface
It is insulating materials.
Further：The Temperature Humidity Sensor is using integrated Temperature Humidity Sensor.
Further：The A/D conversion modules are using 14 AD converters.
Further：The wireless transport module uses RF433 radio receiving transmitting module groups.
Further：The alarm module includes LED light and buzzer.
Further：The information acquisition system includes the chip of model AD7895.
A kind of application method of electric field measurement system based on FPGA controls includes the following steps：
Step 1：To FPGA controller, FPGA controller, which receives, starts letter for handheld terminal or host computer transmitter trigger signal
Number and transmission start control signal to electric-field sensor and Temperature Humidity Sensor；
Step 2：The humiture information of acquisition is transmitted back to FPGA controller by Temperature Humidity Sensor, and electric-field sensor passes through
Electric field signal is transferred to signal acquisition circuit by three channels；
Step 3：Electric field signal is organized into analog signal by signal acquisition circuit, and analog signal is defeated by A/D conversion circuits
Go out digital signal to FPGA controller；
Step 4：FPGA controller by the data stored in the electric field signal received and temperature-humidity signal and host computer into
Row compares, and obtains the measurement error of electric field and carries out error correction；
Step 5：Data transmission after correction to flash is latched and carries out data latch by FPGA controller, while by data
It send to host computer and is shown；
Step 6：Data result is sent to handheld terminal, the number that handheld terminal receives by host computer by wireless transport module
When being more than setting value according to result, the alarm module of handheld terminal starts.
Further：In step 4, the FPGA controller is programmed by VHDL language and realizes control module and its
Control between his each module.
Further：In step 6, the data that a large amount of humitures influence electric field are stored in the host computer, are passed through
Using MATLAB softwares, neural network model is established, for analyzing the relationship between humiture and electric field level, the signal of output
It calculated, corrected in host computer and shown in LabView.
The beneficial effects of the invention are as follows：
A kind of electric field measurement system and its application method, electric-field sensor based on FPGA controls according to the present invention are
Three-dimension type induction structure, using novel bimorph transducer single-turn minor structure (Z axis), XY axis uses rectangle sensitive surface, to using poor
Divide input, reducing influence of the electric-field sensor potential change to measurement result itself can reduce compared to previous cylindrical surface
Influence to direction of an electric field, it is at low cost which is compared to optical profile type electric-field sensor, MEMS sensor,
Simple for process, manufacturing technology is ripe, and clever density is high, and there is no the temperature drifts and the multiple object of sensing material in optical sensor
Manage the influence of effect；X, Y direction changes into rectangle induction chip architecture, it is contemplated that the influence of electric field distortion, X, Y-axis sensing chip rank
Insulation system of the place using chamfering formula is connect, to which the direction of electric field will not be changed.Have inside electric-field sensor the reception of signal with
Transmission unit can be used internal electric source power supply, long-time measured, then use external power supply if measured for the short time
Power supply.The present invention does not use only the control that FPGA carries out intermodule, also by carrying out the correction of electric field error in host computer,
Keep the measurement result of electric field more accurate.Meanwhile operating personnel can be referred to by handheld terminal real-time control measurement process, transmitting-receiving
It enables.
The control circuit uses FPGA controller, the whole motor rotation for controlling electric-field sensor, temperature and humidity sensing
Device data acquire and transmission, electric-field sensor signal acquisition circuit, and establish signal connection by wireless transport module and handheld terminal
System.The signal of output is calculated in host computer, is corrected and shown in LabView；Temperature and humidity measurement module uses humiture
Integrated test quantity sensor；Error correction routine establishes artificial nerve network model using MATLAB softwares, passes through mass data
Comparing calculation obtain final measured value, expand measurement and the application range of power frequency electric field, make it in different humidity, temperature
In the environment of the electric field that measures possess better accuracy, while survey crew can also pass through handheld terminal control and read and measures
As a result, preventing from being influenced by electric field environment in measurement process, preferably ensures people's health safety, safeguard the fortune of power grid
Row.
Description of the drawings
Fig. 1 is the overall construction drawing of electric field measurement system；
Fig. 2 is the sectional view of electric-field sensor in Fig. 1；
Fig. 3 is bimorph transducer single rotor structural schematic diagram in Fig. 2.
Specific implementation mode
With reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, every right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit of the technical scheme of the invention and range, should all be contained
It covers in protection scope of the present invention.
Embodiment 1
Illustrate the present embodiment in conjunction with Fig. 1, Fig. 2 and Fig. 3, it is in the present embodiment, according to the present invention a kind of based on FPGA
The electric field measurement system of control, a kind of electric field measurement system based on FPGA controls, which is characterized in that it includes electric field sensing
Device, control circuit 11, Temperature Humidity Sensor, host computer and handheld terminal, the control circuit 11 include signal acquisition circuit, A/
D conversion circuits, FPGA controller and flash are latched, and the handheld terminal further includes alarm module, and the host computer further includes
Wireless transport module；The host computer is wirelessly connected with handheld terminal, the host computer, handheld terminal, electric-field sensor, warm and humid
Degree sensor, flash latch and A/D conversion circuits connect respectively with FPGA controller two-phase, the electric-field sensor it is defeated
The input terminal of outlet connection signal Acquisition Circuit, the input of the output end connection A/D conversion circuits of the signal acquisition circuit
End；
The electric-field sensor further includes 1, No. two stator 2 of No.1 stator, rotor 3, No.1 sensing chip 3-1, No. two senses
Piece 3-2, signal acquiring system 4, motor 5, power supply 6, electrode plate 7, pillar 8, pedestal 9, X-axis sensitive surface x and Y-axis sensitive surface y are answered,
The X-axis sensitive surface x and Y-axis sensitive surface y is set to No.1 stator 1 below vertically and is mutually perpendicular to, the No.1 stator
1, No. two stators 2 and rotor 3 are respectively equipped with hollow out 3-3, the No.1 sensing chip 3-1 and No. two sensing chip 3-2 are installed respectively
In the hollow out position of No.1 stator 1 and No. two stators 2, i.e. two stators are induction electrode, and the No.1 stator 1 and No. two are determined
Sub 2 juxtapositions are placed, and ensure that No.1 sensing chip 3-1 and No. two sensing chip 3-2 is completely misaligned；The rotor 3 is located at two
The top of a stator, the electrode plate 7 are fixed on the side of rotor 3 and are moved with rotor 3, the No.1 stator 1 and two
Number stator 2 is each attached on pillar 8, and the pillar is fixed on pedestal 9, the rotor 3 and 5 axis connection of motor, described
Motor 5 be located on pedestal 9, No.1 stator 1 and No. two stators 2 are fixed on by pillar 8 on pedestal 9, and two stators are not
It is rotated with motor 5, total of four pillar, the input terminal of the motor 5 and the input terminal of FPGA controller connect power supply 6 simultaneously
Output end, the signal acquiring system 4 is bi-directionally connected with power supply 6, the output end connection signal of the FPGA controller
The input terminal of acquisition system 4,4 output end of signal acquiring system are connect with signal acquisition circuit；
1, No. two stator 2 of No.1 stator, rotor 3, electrode plate 7, the edge of X-axis sensitive surface x and the Y-axis sensitive surface y
Edge be insulating materials, i.e., electrode plate 7 and rotor 3 be bucking electrode, the X-axis sensitive surface x and Y-axis sensitive surface handing-over
Place is insulation chamfering, and described 4 pillars 8 pass through 4 insulation chamferings.
More specifically：The Temperature Humidity Sensor uses the integrated Temperature Humidity Sensor of model SHT11.
More specifically：The FPGA controller uses the FPGA device of model Cyclone EP1C3T144C8, leads to
It crosses VHDL language programming and realizes contacting between control module and other each modules.
More specifically：The A/D conversion modules use 14 A/D converters of model AD9246.
More specifically：The wireless transport module uses the radio receiving transmitting module group of model RF433.
More specifically：The signal acquiring system (4) includes the chip of model AD7895.
A kind of application method of electric field measurement system based on FPGA controls includes the following steps：
Step 1：To FPGA controller, FPGA controller, which receives, starts letter for handheld terminal or host computer transmitter trigger signal
Number and transmission start control signal to electric-field sensor and Temperature Humidity Sensor；
Step 2：The humiture information of acquisition is transmitted back to FPGA controller by Temperature Humidity Sensor, and electric-field sensor passes through
Electric field signal is transferred to signal acquisition circuit by three channels；
Step 3：Electric field signal is organized into analog signal by signal acquisition circuit, and analog signal is defeated by A/D conversion circuits
Go out digital signal to FPGA controller；
Step 4：FPGA controller by the data stored in the electric field signal received and temperature-humidity signal and host computer into
Row compares, and obtains the measurement error of electric field and carries out error correction；
Step 5：Data transmission after correction to flash is latched and carries out data latch by FPGA controller, while by data
It send to host computer and is shown；
Step 6：Data result is sent to handheld terminal, the number that handheld terminal receives by host computer by wireless transport module
When being more than setting value according to result, the alarm module of handheld terminal starts.
More specifically：Three channels of the electric-field sensor are respectively X-axis, Y-axis and Z axis, and Z-direction is using double
Stator, single-turn minor structure, two stators, which intersect, to be placed, using the signal that two stators export as the input signal of differential system,
The influence that sensor potential change itself exports signal is eliminated with this, the X of electric-field sensor, the sensitive surface of Y direction be
Rectangle can reduce the influence to direction of an electric field compared to previous cylindrical surface.
More specifically：The data that a large amount of humitures influence electric field are stored in the host computer, host computer is by adopting
With MATLAB softwares, neural network model is established, analyzes the relationship between humiture and electric field level, passes through collected temperature
Humidity data obtains the measurement error of electric field, and carry out error correction, the signal of output compared with the data stored in host computer
It calculated, corrected in host computer and shown in LabView, data are stored and are sent to host computer shown, host computer is logical
It crosses wireless transport module and sends the result to handheld terminal, facilitate the measurement and control of electric field.
A kind of application method of electric field measurement system based on FPGA controls of the present invention is：Staff passes through hand
It holds end or host computer (computer) sends sign on, the FPGA controller in control circuit 11 passes through to electric-field sensor
Signal acquiring system 4 (being embedded with motor driver) sends enabled instruction, and signal acquiring system 4 receives signal and controls power supply
6 power to signal acquiring system 4 and motor 6, and signal acquiring system 4 can receive the signal of FPGA controller simultaneously, to
The start and stop for controlling motor 6 measure the short time, and the power supply of internal electric source 6 may be used, long-time is measured, then
External power supply need to be used to power；Electric-field sensor is started to work, meanwhile, control circuit 11, which is also sent to Temperature Humidity Sensor, to be started
Instruction, Temperature Humidity Sensor start to measure the humiture of ambient enviroment, and the analog quantity measured is sent to control after AD conversion
Data are carried out flash storages and are transferred to host computer (computer) by circuit 11, control circuit 11, host computer first to temperature and
Humidity data is read out, and artificial neural network is established by MATLAB, is effectively analyzed multiple variables, and several letters are passed through
The Compound Mappings of single non-linear unit, obtain complicated Nonlinear Processing ability, and realization is input to the non-linear of output and reflects
It penetrates, and each layer unit number, hidden layer number and learning rate can be set as the case may be, realizes that the overall situation is approached, into line number
According to fitting, electric field and the physical relationship of humiture are obtained.Then host computer reads voltage (or electric current) data in flash, root
Electric field value is found out according to the functional relation of voltage and tested electric field, final electric field value is then obtained by error correction and by the value
It is shown on the interface of host computer, or the wireless transport module (wireless communication technique) by being fixed on inside handheld terminal, it will
As a result it is transmitted to the handheld terminal of operating personnel, alarm system is made of LED light and buzzer, if the data measured have been more than to set
(either international regulations value is set in advance) in definite value, will trigger alarm system, LED light starts to flicker, and buzzer sounds.
Claims (9)
1. a kind of electric field measurement system based on FPGA controls, which is characterized in that it includes electric-field sensor, control circuit
(11), Temperature Humidity Sensor, host computer and handheld terminal, the control circuit (11) include signal acquisition circuit, A/D conversion electricity
Road, FPGA controller and flash are latched, and the handheld terminal further includes alarm module, and the host computer further includes wirelessly passing
Defeated module；The host computer is wirelessly connected with handheld terminal, the host computer, handheld terminal, electric-field sensor, temperature and humidity sensing
Device, flash are latched and A/D conversion circuits are bi-directionally connected with FPGA controller respectively, and the output end of the electric-field sensor connects
Connect the input terminal of signal acquisition circuit, the input terminal of the output end connection A/D conversion circuits of the signal acquisition circuit；
The electric-field sensor further includes No.1 stator (1), No. two stators (2), rotor (3), No.1 sensing chip (3-1), two
Number sensing chip (3-2), signal acquiring system (4), motor (5), power supply (6), electrode plate (7), pillar (8), pedestal (9), X-axis sense
Face (x) and Y-axis sensitive surface (y), the X-axis sensitive surface (x) and Y-axis sensitive surface (y) is answered to be set under No.1 stator (1) vertically
It face and being mutually perpendicular to, the No.1 stator (1), No. two stators (2) and rotor (3) are respectively equipped with hollow out (3-3), and described one
Number sensing chip (3-1) and No. two sensing chips (3-2) are respectively arranged in the hollow out position of No.1 stator (1) and No. two stators (2), institute
The No.1 stator (1) and No. two stator (2) juxtapositions stated are placed, and ensure No.1 sensing chip (3-1) and No. two sensing chips (3-2)
It is completely misaligned；The rotor (3) is located at the top of two stators, and the electrode plate (7) is fixed on the side of rotor (3)
And moved with rotor (3), the No.1 stator (1) and No. two stators (2) are each attached on pillar (8), and the pillar is solid
It is scheduled on pedestal (9), the rotor (3) and motor (5) axis connection, the motor (5) is located on pedestal (9), described
The input terminal of motor (5) and the input terminal of FPGA controller connect the output end of power supply (6), the signal acquiring system simultaneously
(4) it is bi-directionally connected with power supply (6), the input terminal of the output end connection signal acquisition system (4) of the FPGA controller is described
Signal acquiring system (4) output end connect with signal acquisition circuit；
No.1 stator (1), No. two stators (2), rotor (3), electrode plate (7), the edge of X-axis sensitive surface (x) and the Y-axis sense
It is insulating materials to answer the edge in face (y).
2. a kind of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that described is warm and humid
Sensor is spent using integrated Temperature Humidity Sensor.
3. a kind of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that the A/D
Conversion module is using 14 AD converters.
4. a kind of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that described is wireless
Transmission module uses RF433 radio receiving transmitting module groups.
5. a kind of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that the alarm
Module includes LED light and buzzer.
6. a kind of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that the signal
Acquisition system (4) includes the chip of model AD7895.
7. a kind of application method of electric field measurement system based on FPGA controls according to claim 1, which is characterized in that
It includes the following steps：
Step 1：To FPGA controller, FPGA controller receives enabling signal simultaneously for handheld terminal or host computer transmitter trigger signal
Transmission start controls signal to electric-field sensor and Temperature Humidity Sensor；
Step 2：The humiture information of acquisition is transmitted back to FPGA controller by Temperature Humidity Sensor, and electric-field sensor passes through three
Electric field signal is transferred to signal acquisition circuit by channel；
Step 3：Electric field signal is organized into analog signal by signal acquisition circuit, and analog signal exports number by A/D conversion circuits
Word signal is to FPGA controller；
Step 4：FPGA controller compares the electric field signal received and temperature-humidity signal with the data stored in host computer
Compared with obtaining the measurement error of electric field and carry out error correction；
Step 5：FPGA controller by the data transmission after correction to flash latch carry out data latch, while by data send to
Host computer is shown；
Step 6：Data result is sent to handheld terminal, the data knot that handheld terminal receives by host computer by wireless transport module
When fruit is more than setting value, the alarm module of handheld terminal starts.
8. a kind of application method of electric field measurement system based on FPGA controls according to claim 7, which is characterized in that
In step 4, the FPGA controller programs the control realized between control module and other each modules by VHDL language
System.
9. a kind of application method of electric field measurement system based on FPGA controls according to claim 7, which is characterized in that
In step 6, the data that a large amount of humitures influence electric field are stored in the host computer and are built by using MATLAB softwares
Vertical neural network model, for analyzing the relationship between humiture and electric field level, the signal of output is counted in host computer
It calculates, correct and shown in LabView.
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| CN112782462A (en) * | 2020-12-04 | 2021-05-11 | 国网江苏省电力有限公司盐城供电分公司 | Direct-current voltage detection alarm system based on electric field measurement and detection method thereof |
| CN112881818A (en) * | 2021-01-15 | 2021-06-01 | 广州穗能通能源科技有限责任公司 | Electric field intensity measuring method, electric field intensity measuring device, computer equipment and storage medium |
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| CN112782462A (en) * | 2020-12-04 | 2021-05-11 | 国网江苏省电力有限公司盐城供电分公司 | Direct-current voltage detection alarm system based on electric field measurement and detection method thereof |
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