CN109116282A - A kind of the temperature influence bearing calibration and system of line-frequency electric field measuring device - Google Patents
A kind of the temperature influence bearing calibration and system of line-frequency electric field measuring device Download PDFInfo
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- CN109116282A CN109116282A CN201811158535.6A CN201811158535A CN109116282A CN 109116282 A CN109116282 A CN 109116282A CN 201811158535 A CN201811158535 A CN 201811158535A CN 109116282 A CN109116282 A CN 109116282A
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- 230000005684 electric field Effects 0.000 title claims abstract description 362
- 238000012937 correction Methods 0.000 claims abstract description 119
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 16
- 230000002277 temperature effect Effects 0.000 claims abstract description 4
- 230000009467 reduction Effects 0.000 claims description 20
- 238000009825 accumulation Methods 0.000 claims description 18
- 238000002474 experimental method Methods 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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Abstract
The temperature that the present invention provides a kind of workshop field measurement device influences bearing calibration and system, line-frequency electric field measuring device and bracket used are placed in temperature by it together, in the power frequency electric field generating device of the continuously adjustable confined space of humidity, temperature is adjusted when passing through moisture constant obtains temperature change to the affecting laws of line-frequency electric field measuring device, and corresponding correction for temperature effect coefficient is obtained by calculation, then numerical fitting is carried out to the temperature correction coefficient under different humidity, obtain corresponding correction function, and reading and correction function progress value revision according to the line-frequency electric field measuring device in actual measurement.Compared to the prior art, method and system of the invention overcome existing portion temperature responsive type line-frequency electric field measuring device vary with temperature it is larger, be difficult to meet the defect applied under different temperatures, the measurement result of acquisition is more acurrate.
Description
Technical field
The present invention relates to field of measuring technique, and more particularly, to a kind of temperature shadow of workshop field measurement device
Ring bearing calibration and system.
Background technique
In the weight that power-frequency electric field strength has become AC power transmission and transformation project construction, environmental impact assessment must be studied and be controlled
Index is wanted, power frequency electric field instrument measurement electric field strength is generallyd use in order to obtain the electric field level of practical AC power transmission and transformation project, is
It is a variety of new to have developed photoelectricity, MEMS etc. at present for the defect for overcoming conventional capacitive-type electric field measuring apparatus to be affected with humidity
Type field measurement device, practical application show part novel electric field device although humidity influence is overcome, by temperature change shadow
Sound is larger, it is difficult to meet the needs that outdoor wide range of temperature power frequency electric field accurately measures, and existing research shows that not only
Electric field probe will affect measurement result, and different electric field brackets can also have an impact to measurement result, traditional dressing plate size
Gap spacing is generally in 1m or so, and line-frequency electric field measuring device height is in 1.5m or so, traditional platform and system after belt supporting frame
The power frequency electric field temperature for being difficult to meet belt supporting frame influences correction needs.Therefore there is an urgent need to propose a kind of power frequency electric field of receiving completely
The probe of measuring device and bracket used, and the method and system that the correction of line-frequency electric field measuring device is affected by temperature.
Summary of the invention
In order to solve in the prior art only to calibrate line-frequency electric field measuring device probe body in fixed humidity
The technical problem for leading to measurement result inaccuracy, the present invention provides a kind of temperature of line-frequency electric field measuring device to influence correction
Method, which comprises
The temperature and relative humidity of the line-frequency electric field measuring device local environment are measured with predetermined time interval；
Line-frequency electric field measuring device measures the first electric field reading of the power frequency electric field；
When the line-frequency electric field measuring device local environment relative humidity is constant, and when temperature change, increased based on temperature
Or the direction of reduction, the power frequency electric field is measured according to first electric field reading and pre-set temperature adjustmemt function
Device carries out data calibration, determines the actual read number of power frequency electric field, wherein the temperature adjustmemt function is will be under different humidity
The temperature of line-frequency electric field measuring device increases correction factor and temperature reduces correction factor and carries out the function obtained after numerical fitting.
Further, in the temperature for measuring the line-frequency electric field measuring device local environment with predetermined time interval and relatively
It further include the temperature adjustmemt function for determining the line-frequency electric field measuring device for measuring the power frequency electric field before humidity, in which:
Step 1, the parallel pole that line-frequency electric field measuring device to be corrected is put into parallel plate electrode power frequency electric field generating device
Between plate, and height will be worked normally as defined in stent to the line-frequency electric field measuring device, wherein the parallel plate electrode work
Frequency electric field generation device is placed in the closed experiment container of pre-set temperature and humidity continuously adjustable, the parallel pole
Plate power frequency electric field generating device includes about two pieces parallel pole plates, high-voltage ac power, high AC voltage measurement table, upper pole
Plate connects high-voltage ac power, and bottom crown ground connection, high-voltage alternating high-tension measurement table both ends connect bottom crown respectively, for measuring pole
Voltage between plate；
Step 2 applies a fixed high voltage on top crown, and a stable electricity is generated between two parallel plate electrodes
?；
Step 3 fixes a rh value, and temperature is gradually increased to the second setting value by the first setting value, record
The electric field of line-frequency electric field measuring device reads T under different temperaturesi, and according to the different temperatures determined in the temperature accumulation process
When electric field read TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix；
Step 4 keeps step 3 rh value constant, and temperature is gradually decreased to the first setting value by the second setting value,
The electric field for recording line-frequency electric field measuring device under different temperatures reads Td, and the difference determined during being reduced according to the temperature
Electric field when temperature reads TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor
Tdx；
Step 5 changes rh value, repeats step 3 and 4, obtains under different temperatures, keeps not in theoretical electric field strength
When change, the electric field reading variation with temperature rule of power-frequency electric field strength instrument, the power frequency electric field obtained under different relative humidity is surveyed
The temperature for measuring device increases correction factor and temperature reduces correction factor；
The temperature of line-frequency electric field measuring device under different relative humidity is increased correction factor and temperature reduction by step 6
Correction factor is carried out numerical fitting and is repaired with the temperature for determining that line-frequency electric field measuring device is affected by temperature under different relative humidity
Positive function.
Further, it when the line-frequency electric field measuring device local environment relative humidity is constant, and when temperature change, is based on
Temperature increases or the direction of reduction, according to first electric field reading and pre-set temperature adjustmemt function to the power frequency
Field measurement device carries out data calibration, determines that the actual read number of power frequency electric field includes:
According to the relative humidity and temperature of temperature adjustmemt function and the line-frequency electric field measuring device local environment of measurement,
Determine the temperature correction coefficient of line-frequency electric field measuring device corresponding with temperature in the relative humidity；
The quotient of the first electric field reading and temperature correction coefficient is calculated, the quotient is that line-frequency electric field measuring device exists
Electric field reading under normal temperature value.
Electric field when further, according to the different temperatures determined in the temperature accumulation process reads TiAnd normal temperature
The electric field of value reads TsIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix, its calculation formula is:
Further, the electric field when different temperatures determined during being reduced according to the temperature reads TdAnd normal temperature
The electric field of value reads TsIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx, its calculation formula is:
Further, the temperature adjustmemt function of the determining line-frequency electric field measuring device for measuring the power frequency electric field also wraps
It includes under same relative humidity, when the electric field of the line-frequency electric field measuring device determined in temperature accumulation process reads TiSubtract with temperature
The electric field of line-frequency electric field measuring device during few in same temperature value reads TdRatio in second interval, the temperature
Degree increases correction factor and temperature reduces coefficient and merges into temperature correction coefficient Tx, its calculation formula is:
Further, the first setting value of the temperature is -20 DEG C, and the second setting value is 40 DEG C, and normal temperature value is 20
℃。
According to another aspect of the present invention, the temperature that the present invention provides a kind of line-frequency electric field measuring device influences correction system
System, the system comprises:
First measuring unit, for measuring the temperature of the line-frequency electric field measuring device local environment with predetermined time interval
And relative humidity；
Line-frequency electric field measuring device is used to measure the first electric field reading of the power frequency electric field；
Temperature correction unit is used for when the line-frequency electric field measuring device local environment relative humidity is constant, and temperature
When variation, using pre-set temperature adjustmemt function, the direction based on temperature increase or reduction is read according to the first electric field
Increasing the result that correction factor or temperature reduction correction factor obtain divided by temperature of relative humidity when constant is institute
State the practical electric field reading of power frequency electric field, wherein the temperature adjustmemt function is by the power frequency electric field measurement dress under different humidity
The temperature set increases correction factor and temperature reduces correction factor and carries out the function obtained after numerical fitting.
Further, the system also includes pretreatment unit, it is used to determine humidity correction factor and function, it is described pre-
Processing unit includes:
Closed experiment container is used to accommodate power frequency electric field generating device, wherein the temperature in the closed experiment container
It is continuously adjustable with humidity；
Power frequency electric field generating device is used to accommodate line-frequency electric field measuring device to be calibrated, generates stable electric field, institute
It states power frequency electric field generating device to be located in closed experiment container, including about two pieces parallel pole plates, high-voltage ac power, high pressures
Ac voltage measurement table, wherein top crown connects high-voltage ac power, bottom crown ground connection, apply on top crown one it is fixed
A stable electric field is generated between latter two parallel plate electrode of high voltage, high-voltage alternating high-tension measurement table both ends connect lower pole respectively
Plate, for voltage between measuring pad；
Temperature adjustmemt unit is used to fix a rh value, and temperature is gradually increased to by the first setting value
Two setting values, the electric field for recording line-frequency electric field measuring device under different temperatures read Ti, and according in the temperature accumulation process
Electric field when determining different temperatures reads TiT is read with the electric field of normal temperature valuesLine-frequency electric field measuring device temperature is calculated to increase
Add correction factor Tix；It keeps the rh value constant, temperature is gradually decreased into the first setting value by the second setting value, remember
The electric field for recording line-frequency electric field measuring device under different temperatures reads Td, and the not equality of temperature determined during being reduced according to the temperature
Electric field when spending reads TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor
Tdx；Change rh value, is recorded in line-frequency electric field measuring device described in each rh value and increases or reduce with temperature
When electric field reading, obtain under different humidity, when theoretical electric field strength remains unchanged, the electric field of power-frequency electric field strength instrument is read
Variation with temperature rule, the line-frequency electric field measuring device temperature increase correction factor and temperature obtained under different relative humidity subtract
Few correction factor；And by under different relative humidity line-frequency electric field measuring device temperature increase correction factor and temperature reduction repair
Positive coefficient carries out numerical fitting to determine temperature adjustmemt that line-frequency electric field measuring device is affected by temperature under different relative humidity
Function.
Further, the temperature correction unit includes:
Temperature coefficient unit is used for the ring according to locating for temperature adjustmemt function and the line-frequency electric field measuring device of measurement
The relative humidity and temperature in border determine the temperature of line-frequency electric field measuring device corresponding with temperature in the relative humidity
Correction factor；
As a result determination unit, is used to calculate the quotient of the first electric field reading and temperature correction coefficient, and the quotient is
The electric field for being line-frequency electric field measuring device under normal temperature value reading.
Further, the electric field when temperature adjustmemt unit is according to the different temperatures determined in the temperature accumulation process
Read TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix, calculate public
Formula are as follows:
Further, the electric field when different temperatures determined during the temperature adjustmemt unit is reduced according to the temperature
Read TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx, calculate public
Formula are as follows:
Further, the temperature adjustmemt unit is also used under same relative humidity, when determining in temperature accumulation process
Line-frequency electric field measuring device electric field read TiPower frequency electric field during reducing with temperature in same temperature value, which measures, to be filled
The electric field reading T setdRatio in second interval, the temperature increased into correction factor and temperature reduce coefficient and merge into temperature
Spend correction factor Tx, its calculation formula is:
Further, the first setting value of the pretreatment unit setting is -20 DEG C, and the second setting value is 40 DEG C, standard
Temperature value is 20 DEG C.
Further, the distance between the top crown of the power frequency electric field generating device and bottom crown should be not less than 2 meters, institute
It is round or rectangular for stating parallel plate electrode up and down, wherein when the parallel plate electrode is circle, the diameter of pole plate is not less than 3 meters,
When the parallel plate electrode be it is rectangular bright, the side length of the pole plate is no less than 3 meters.
Further, when the line-frequency electric field measuring device is non-moisture-sensitive, the temperature adjustmemt unit is only needed
Determine that the temperature under a kind of relative humidity increases correction factor and temperature reduces correction factor, and by the work under the relative humidity
Frequency field measurement device temperature increases correction factor and temperature reduces correction factor and carries out the temperature adjustmemt letter that numerical fitting determines
Number is the correction for temperature effect function that the line-frequency electric field measuring device is affected by temperature under different relative humidity, wherein
The line-frequency electric field measuring device of the non-moisture-sensitive is fixed in temperature, and electric field measurement value is constant when humidity changes.
The temperature for the line-frequency electric field measuring device that technical solution of the present invention provides influences bearing calibration and system answers engineering
Line-frequency electric field measuring device and bracket used are placed in the power frequency electric of the continuously adjustable confined space of temperature, humidity together
In generating device, temperature is adjusted when passing through moisture constant and obtains temperature change to the affecting laws of line-frequency electric field measuring device,
And corresponding temperature correction coefficient is obtained by calculation, then carried out according to the temperature correction coefficient under the different relative humidity
Numerical fitting, obtains temperature adjustmemt function, and according to line-frequency electric field measuring device reading in actual measurement and repairs
Positive function is corrected.Compared to the prior art, the invention has the following beneficial effects:
1, method and system provided by the invention can influence to be modified on different temperatures, and overcoming the prior art can only
The defect that line-frequency electric field measuring device is calibrated at a fixed temperature；
2, method and system provided by the invention can not only calibrate probe in itself, can also be in probe and bracket
Full-scale calibration is carried out when connected, avoids the simple calibration probe measurement error that sizing stop does not introduce；
3, the calibration method and system that the present invention provides are not that the simple fixed value at a temperature of some is modified,
But according to field application situation, it is modified when temperature increases using the coefficient obtained when increasing temperature, otherwise using temperature
Obtained coefficient is modified when degree reduces, and when avoiding instrument and varying with temperature, increase and decrease coefficient is inconsistent, and using single
The error that coefficient amendment introduces；
4, method and its system provided by the invention, practical, application and popularization value is high, has weight on engineer application
Meaning is wanted, important technical support can be provided for the measurement of round-the-clock power frequency electric field；
5, method and its system provided by the invention, can be used for the manufacture of power frequency electric field instrument, it is only necessary in measuring instrument
One temperature-humidity sensor of upper increase the correction function under the influence of different temperatures is written in the software of instrument, in-site measurement
When directly display calibration after measurement result, be greatly improved power frequency electric field measurement convenience and accuracy.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is the process that bearing calibration is influenced according to the temperature of the line-frequency electric field measuring device of the preferred embodiment for the present invention
Figure；
Fig. 2 is the structure that correction system is influenced according to the temperature of the line-frequency electric field measuring device of the preferred embodiment for the present invention
Schematic diagram.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the process that bearing calibration is influenced according to the temperature of the line-frequency electric field measuring device of the preferred embodiment for the present invention
Figure.As shown in Figure 1, calibrating the method 100 of the measurement result of power frequency electric field device described in this preferred embodiment from step 101
Start.
In step 101, the temperature adjustmemt function for measuring the line-frequency electric field measuring device of the power frequency electric field is determined.
In step 102, the temperature and relative humidity of the power frequency electric field local environment are measured with predetermined time interval.
In step 103, line-frequency electric field measuring device measures the first electric field reading of the power frequency electric field.
In step 104, when the power frequency electric field local environment relative humidity is constant, and when temperature change, increased based on temperature
Add or the direction of reduction, the power frequency electric field is surveyed according to first electric field reading and pre-set temperature adjustmemt function
It measures device and carries out data calibration, determine the actual read number of power frequency electric field, wherein the temperature adjustmemt function is will be under different humidity
Line-frequency electric field measuring device temperature increase correction factor and temperature and reduce correction factor and carry out the function obtained after numerical fitting.
Preferably, the temperature adjustmemt function of the determining line-frequency electric field measuring device for measuring the power frequency electric field includes:
Step 1, the parallel pole that line-frequency electric field measuring device to be corrected is put into parallel plate electrode power frequency electric field generating device
Between plate, and height will be worked normally as defined in stent to the line-frequency electric field measuring device, wherein the parallel plate electrode work
Frequency electric field generation device is placed in the closed experiment container of pre-set temperature and humidity continuously adjustable, the parallel pole
Plate power frequency electric field generating device includes about two pieces parallel pole plates, high-voltage ac power, high AC voltage measurement table, upper pole
Plate connects high-voltage ac power, and bottom crown ground connection, high-voltage alternating high-tension measurement table both ends connect bottom crown respectively, for measuring pole
Voltage between plate；
Step 2 applies a fixed high voltage on top crown, and a stable electricity is generated between two parallel plate electrodes
?；
Step 3 fixes a rh value, and temperature is gradually increased to the second setting value by the first setting value, record
The electric field of line-frequency electric field measuring device reads T under different temperaturesi, and according to the different temperatures determined in the temperature accumulation process
When electric field read TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix；
Step 4 keeps step 3 rh value constant, and temperature is gradually decreased to the first setting value by the second setting value,
The electric field for recording line-frequency electric field measuring device under different temperatures reads Td, and the difference determined during being reduced according to the temperature
Electric field when temperature reads TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor
Tdx；
Step 5 changes rh value, repeats step 3 and 4, obtains under different temperatures, keeps not in theoretical electric field strength
When change, the electric field reading variation with temperature rule of power-frequency electric field strength instrument, the power frequency electric field obtained under different relative humidity is surveyed
It measures unit temp and increases correction factor and temperature reduction correction factor；
The temperature of line-frequency electric field measuring device under different relative humidity is increased correction factor and temperature reduction by step 6
Correction factor is carried out numerical fitting and is repaired with the temperature for determining that line-frequency electric field measuring device is affected by temperature under different relative humidity
Positive function.
Preferably, when the line-frequency electric field measuring device local environment relative humidity is constant, and when temperature change, based on temperature
Degree increases or the direction of reduction, according to first electric field reading and pre-set temperature adjustmemt function to the power frequency electric
Field measurement device carries out data calibration, determines that the actual read number of power frequency electric field includes:
According to the relative humidity and temperature of temperature adjustmemt function and the line-frequency electric field measuring device local environment of measurement,
Determine the temperature correction coefficient of line-frequency electric field measuring device corresponding with temperature in the relative humidity；
The quotient of the first electric field reading and temperature correction coefficient is calculated, the quotient is that line-frequency electric field measuring device exists
Electric field reading under normal temperature value.
Electric field when preferably, according to the different temperatures determined in the temperature accumulation process reads TiWith normal temperature value
Electric field read TsIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix, its calculation formula is:
Preferably, the electric field when different temperatures determined during being reduced according to the temperature reads TdWith normal temperature value
Electric field read TsIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx, its calculation formula is:
Preferably, the method also includes under same relative humidity, when the power frequency electric field determined in temperature accumulation process
The electric field of measuring device reads SiThe electric field of line-frequency electric field measuring device during reducing with temperature in same temperature value is read
Number SdRatio in second interval, the temperature increases correction factor and temperature reduces coefficient and merges into temperature correction coefficient Tx,
Its calculation formula is:
Under same relative humidity, when the electric field of the line-frequency electric field measuring device determined in temperature accumulation process reads SiWith
The electric field of line-frequency electric field measuring device during temperature reduction in same temperature value reads SdWhen being not much different, can only have
Unique temperature correction coefficient takes S in the preferred embodimentiAnd SdRatio at [0.98,1.02], it is believed that it can be with
Only there is a temperature correction coefficient.
Preferably, the first setting value of the temperature is -20 DEG C, and the second setting value is 40 DEG C, and normal temperature value is 20 DEG C.
Fig. 2 is the structure that correction system is influenced according to the temperature of the line-frequency electric field measuring device of the preferred embodiment for the present invention
Schematic diagram.It is wrapped as shown in Fig. 2, the temperature of line-frequency electric field measuring device described in this preferred embodiment influences correction system 200
It includes:
Pretreatment unit 201 is used to determine the humidity correction function of line-frequency electric field measuring device.
First measuring unit 202 is used to measure the temperature of the power frequency electric field local environment with predetermined time interval
And relative humidity.
Line-frequency electric field measuring device 203 is used to measure the first electric field reading of the power frequency electric field.
Temperature correction unit 204 is used for when the power frequency electric field local environment relative humidity is constant, and temperature change
When, the direction based on temperature increase or reduction, according to first electric field reading and pre-set temperature adjustmemt function pair
The line-frequency electric field measuring device carries out data calibration, determines the actual read number of power frequency electric field, wherein the temperature adjustmemt function
It is that the increase correction factor of the line-frequency electric field measuring device temperature under different humidity and temperature are reduced correction factor to carry out numerical value
The function obtained after fitting.
Preferably, the pretreatment unit 201 includes:
Closed experiment container is used to accommodate power frequency electric field generating device, wherein the temperature in the closed experiment container
It is continuously adjustable with humidity；
Power frequency electric field generating device is used to accommodate line-frequency electric field measuring device to be calibrated, generates stable electric field, institute
It states power frequency electric field generating device to be located in closed experiment container, including about two pieces parallel pole plates, high-voltage ac power, high pressures
Ac voltage measurement table, wherein top crown connects high-voltage ac power, bottom crown ground connection, apply on top crown one it is fixed
A stable electric field is generated between latter two parallel plate electrode of high voltage, high-voltage alternating high-tension measurement table both ends connect lower pole respectively
Plate, for voltage between measuring pad；
Temperature adjustmemt unit is used to fix a rh value, and temperature is gradually increased to by the first setting value
Two setting values, the electric field for recording line-frequency electric field measuring device under different temperatures read Ti, and according in the temperature accumulation process
Electric field when determining different temperatures reads TiT is read with the electric field of normal temperature valuesLine-frequency electric field measuring device temperature is calculated to increase
Add correction factor Tix；It keeps the rh value constant, temperature is gradually decreased into the first setting value by the second setting value, remember
The electric field for recording line-frequency electric field measuring device under different temperatures reads Td, and the not equality of temperature determined during being reduced according to the temperature
Electric field when spending reads TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor
Tdx；Change rh value, is recorded in line-frequency electric field measuring device described in each rh value and increases or reduce with temperature
When electric field reading, obtain under different humidity, when theoretical electric field strength remains unchanged, the electric field of power-frequency electric field strength instrument is read
Variation with temperature rule, the line-frequency electric field measuring device temperature increase correction factor and temperature obtained under different relative humidity subtract
Few correction factor；And by under different relative humidity line-frequency electric field measuring device temperature increase correction factor and temperature reduction repair
Positive coefficient carries out numerical fitting to determine temperature adjustmemt that line-frequency electric field measuring device is affected by temperature under different relative humidity
Function.
Preferably, the temperature correction unit 204 includes:
Temperature coefficient unit 241 is used for the line-frequency electric field measuring device institute according to temperature adjustmemt function and measurement
Locate the relative humidity and temperature of environment, determines in the relative humidity, line-frequency electric field measuring device corresponding with temperature
Temperature correction coefficient；
As a result determination unit 242 are used to calculate the quotient of the first electric field reading and temperature correction coefficient, the quotient
As electric field reading of the line-frequency electric field measuring device under normal temperature value.
Preferably, the electric field when temperature adjustmemt unit is according to the different temperatures determined in the temperature accumulation process is read
Number TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix, calculation formula
Are as follows:
Preferably, the electric field when different temperatures determined during the temperature adjustmemt unit is reduced according to the temperature is read
Number TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx, calculation formula
Are as follows:
Preferably, the temperature adjustmemt unit is also used under same relative humidity, when what is determined in temperature accumulation process
The electric field of line-frequency electric field measuring device reads TiLine-frequency electric field measuring device during being reduced with temperature in same temperature value
Electric field read TdRatio in second interval, the temperature increased into correction factor and temperature reduce coefficient and merge into temperature
Correction factor Tx, its calculation formula is:
Preferably, the first setting value of the pretreatment unit 201 is -20 DEG C, and the second setting value is 40 DEG C, normal temperature
Value is 20 DEG C.
Preferably, the distance between the top crown of the power frequency electric field generating device 212 and bottom crown should be not less than 2 meters,
Usually take 3m, the parallel plate electrode up and down is round or rectangular, wherein when the parallel plate electrode is circle, pole plate it is straight
Diameter be not less than 3 meters, when the parallel plate electrode be it is rectangular bright, the side length of the pole plate is no less than 3 meters.
Preferably, when the line-frequency electric field measuring device is non-moisture-sensitive, the temperature adjustmemt unit is only needed really
Temperature under a kind of fixed relative humidity increases correction factor and temperature reduces correction factor, and by the power frequency under the relative humidity
Field measurement device temperature increases correction factor and temperature reduces correction factor and carries out the temperature adjustmemt function that numerical fitting determines
The correction for temperature effect function that the as described line-frequency electric field measuring device is affected by temperature under different relative humidity, wherein institute
The line-frequency electric field measuring device for stating non-moisture-sensitive is fixed in temperature, and electric field measurement value is constant when humidity changes.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (16)
1. the method that a kind of temperature of line-frequency electric field measuring device influences correction, which is characterized in that the described method includes:
The temperature and relative humidity of the line-frequency electric field measuring device local environment are measured with predetermined time interval；
Line-frequency electric field measuring device measures the first electric field reading of the power frequency electric field；
When the line-frequency electric field measuring device local environment relative humidity is constant, and when temperature change, increased based on temperature or
The direction of reduction, according to first electric field reading and pre-set temperature adjustmemt function to the line-frequency electric field measuring device
Data calibration is carried out, determines the actual read number of power frequency electric field, wherein the temperature adjustmemt function is by the power frequency under different humidity
The temperature of field measurement device increases correction factor and temperature reduces correction factor and carries out the function obtained after numerical fitting.
2. the method according to claim 1, wherein being measured locating for the power frequency electric field with predetermined time interval
It further include determining that the temperature for the line-frequency electric field measuring device for measuring the power frequency electric field is repaired before the temperature and relative humidity of environment
Positive function, in which:
Line-frequency electric field measuring device to be corrected is put between the parallel plate electrode of parallel plate electrode power frequency electric field generating device by step 1,
And height will be worked normally as defined in stent to the line-frequency electric field measuring device, wherein the parallel plate electrode power frequency electric
Field generating device is placed in the closed experiment container of pre-set temperature and humidity continuously adjustable, the parallel plate electrode work
Frequency electric field generation device includes about two pieces parallel pole plates, high-voltage ac power, high AC voltage measurement table, and top crown connects
High-voltage ac power, bottom crown ground connection, high-voltage alternating high-tension measurement table both ends connect bottom crown respectively, between measuring pad
Voltage；
Step 2 applies a fixed high voltage on top crown, and a stable electric field is generated between two parallel plate electrodes；
Step 3 fixes a rh value, temperature is gradually increased to the second setting value by the first setting value, record is different
At a temperature of line-frequency electric field measuring device electric field read Ti, and according in the temperature accumulation process determine different temperatures when
Electric field reads TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix；
Step 4 keeps step 3 rh value constant, and temperature is gradually decreased to the first setting value by the second setting value, records
The electric field of line-frequency electric field measuring device reads T under different temperaturesd, and the different temperatures determined during being reduced according to the temperature
When electric field read TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx；
Step 5 changes rh value, repeats step 3 and 4, obtains under different temperatures, remains unchanged in theoretical electric field strength
When, the electric field reading variation with temperature rule of power-frequency electric field strength instrument obtains the power frequency electric field measurement under different relative humidity
Unit temp increases correction factor and temperature reduces correction factor；
Line-frequency electric field measuring device temperature under different relative humidity is increased correction factor and temperature reduction amendment system by step 6
Number carries out numerical fittings to determine temperature adjustmemt function that line-frequency electric field measuring device is affected by temperature under different relative humidity.
3. according to the method described in claim 2, it is characterized in that, when the line-frequency electric field measuring device local environment is relatively wet
It spends constant, and when temperature change, is increased based on temperature or the direction of reduction, read and preset according to first electric field
Temperature adjustmemt function to the line-frequency electric field measuring device carry out data calibration, determine that the actual read number of power frequency electric field includes:
According to the relative humidity and temperature of temperature adjustmemt function and the line-frequency electric field measuring device local environment of measurement, determine
In the relative humidity, the temperature correction coefficient of line-frequency electric field measuring device corresponding with temperature；
The quotient of the first electric field reading and temperature correction coefficient is calculated, the quotient is line-frequency electric field measuring device in standard
Electric field reading under temperature value.
4. according to the method described in claim 2, it is characterized in that, according to the different temperatures determined in the temperature accumulation process
When electric field read TiT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and increases correction factor Tix,
Its calculation formula is:
5. according to the method described in claim 2, it is characterized in that, the different temperatures determined during being reduced according to the temperature
When electric field read TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx,
Its calculation formula is:
6. according to the method described in claim 2, it is characterized in that, the determining power frequency electric field for measuring the power frequency electric field is surveyed
The temperature adjustmemt function of amount device further includes under same relative humidity, when the power frequency electric field measurement determined in temperature accumulation process
The electric field of device reads TiThe electric field of line-frequency electric field measuring device during reducing with temperature in same temperature value reads Td's
For ratio in second interval, the temperature increases correction factor and temperature reduces coefficient and merges into temperature correction coefficient Tx, meter
Calculate formula are as follows:
7. according to the method described in claim 2, second is arranged it is characterized in that, the first setting value of the temperature is -20 DEG C
Value is 40 DEG C, and normal temperature value is 20 DEG C.
8. a kind of temperature of line-frequency electric field measuring device influences correction system, which is characterized in that the system comprises:
First measuring unit, for predetermined time interval come measure the line-frequency electric field measuring device local environment temperature and
Relative humidity；
Line-frequency electric field measuring device is used to measure the first electric field reading of the power frequency electric field；
Temperature correction unit is used for when the line-frequency electric field measuring device local environment relative humidity is constant, and temperature change
When, the direction based on temperature increase or reduction, according to first electric field reading and pre-set temperature adjustmemt function pair
The line-frequency electric field measuring device carries out data calibration, determines the actual read number of power frequency electric field, wherein the temperature adjustmemt function
It is that the temperature of the line-frequency electric field measuring device under different relative humidity is increased to correction factor and temperature reduction correction factor progress
The function obtained after numerical fitting.
9. system according to claim 8, which is characterized in that the system also includes pretreatment unit, be used to determine
Temperature adjustmemt function, the pretreatment unit include:
Closed experiment container is used to accommodate power frequency electric field generating device, wherein temperature in the closed experiment container and wet
Degree is continuously adjustable；
Power frequency electric field generating device is used to accommodate line-frequency electric field measuring device to be calibrated, generates stable electric field, the work
Frequency electric field generation device is located in closed experiment container, including about two pieces parallel pole plates, high-voltage ac power, high-voltage alternatings
Voltage measurement table, wherein top crown connects high-voltage ac power, and bottom crown ground connection applies a fixed height electricity on top crown
It presses and generates a stable electric field between latter two parallel plate electrode, high-voltage alternating high-tension measurement table both ends connect bottom crown respectively, use
The voltage between measuring pad；
Temperature adjustmemt unit is used to fix a rh value, and temperature is gradually increased to second by the first setting value and is set
Value is set, the electric field for recording line-frequency electric field measuring device under different temperatures reads Ti, and determined according in the temperature accumulation process
Different temperatures when electric field read TiT is read with the electric field of normal temperature valuesThe increase of line-frequency electric field measuring device temperature is calculated to repair
Positive coefficient Tix；It keeps the rh value constant, temperature is gradually decreased into the first setting value by the second setting value, record is not
The electric field of synthermal lower line-frequency electric field measuring device reads Td, and according to the temperature reduce during determine different temperatures when
Electric field read TdT is read with the electric field of normal temperature valuesIt calculates line-frequency electric field measuring device temperature and reduces correction factor Tdx；Change
Become rh value, is recorded in electricity when line-frequency electric field measuring device described in each rh value increases or reduces with temperature
Field reading, obtains under different humidity, and when theoretical electric field strength remains unchanged, the electric field of power-frequency electric field strength instrument is read with temperature
Changing rule, obtain that line-frequency electric field measuring device temperature under different relative humidity increases correction factor and temperature reduces amendment
Coefficient；And the line-frequency electric field measuring device temperature under different relative humidity is increased into correction factor and temperature reduction correction factor
Numerical fitting is carried out to determine temperature adjustmemt function that line-frequency electric field measuring device is affected by temperature under different relative humidity.
10. system according to claim 9, which is characterized in that the temperature correction unit includes:
Temperature coefficient unit is used for according to temperature adjustmemt function and the line-frequency electric field measuring device local environment of measurement
Relative humidity and temperature determine the temperature adjustmemt of line-frequency electric field measuring device corresponding with temperature in the relative humidity
Coefficient；
As a result determination unit is used to calculate the quotient of the first electric field reading and temperature correction coefficient, and the quotient is work
Electric field reading of the frequency field measurement device under normal temperature value.
11. system according to claim 9, which is characterized in that the temperature adjustmemt unit increased according to the temperature
The electric field when different temperatures determined in journey reads TiT is read with the electric field of normal temperature valuesCalculate line-frequency electric field measuring device temperature
Degree increases correction factor Tix, its calculation formula is:
12. system according to claim 9, which is characterized in that the temperature adjustmemt unit was reduced according to the temperature
The electric field when different temperatures determined in journey reads TdT is read with the electric field of normal temperature valuesCalculate line-frequency electric field measuring device temperature
Degree reduces correction factor Tdx, its calculation formula is:
13. system according to claim 9, which is characterized in that the temperature adjustmemt unit is also used to same relatively wet
Under degree, when the electric field of the line-frequency electric field measuring device determined in temperature accumulation process reads TiSame during being reduced with temperature
The electric field of line-frequency electric field measuring device when temperature value reads TdRatio in second interval, by the temperature increase amendment system
Several and temperature reduces coefficient and merges into temperature correction coefficient Tx, its calculation formula is:
14. system according to claim 9, which is characterized in that the first setting value -20 of the pretreatment unit setting
DEG C, the second setting value is 40 DEG C, and normal temperature value is 20 DEG C.
15. system according to claim 9, which is characterized in that the top crown of the power frequency electric field generating device and lower pole
The distance between plate should be not less than 2 meters, and the parallel plate electrode up and down is round or rectangular, wherein when the parallel plate electrode is
When round, the diameter of pole plate is not less than 3 meters, when the parallel plate electrode be it is rectangular bright, the side length of the pole plate is no less than 3 meters.
16. system according to claim 9, which is characterized in that when the line-frequency electric field measuring device is non-humidity sensitive
When type, the temperature adjustmemt unit need to only determine that the temperature under a kind of relative humidity increases correction factor and temperature reduces amendment system
Number, and the line-frequency electric field measuring device temperature under the relative humidity is increased into correction factor and temperature reduction correction factor progress
The temperature adjustmemt function that numerical fitting determines is that the line-frequency electric field measuring device is affected by temperature under different relative humidity
Correction for temperature effect function, wherein the line-frequency electric field measuring device of the non-moisture-sensitive is fixed in temperature, humidity variation
When electric field measurement value it is constant.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540241A (en) * | 2020-11-30 | 2021-03-23 | 重庆电子工程职业学院 | Non-linear compensation system and method for electric field intensity measurement |
| CN114137468A (en) * | 2021-10-21 | 2022-03-04 | 国网浙江省电力有限公司电力科学研究院 | Method and system for correcting field intensity measured by direct current electric field intensity detector |
| CN114167120A (en) * | 2021-12-14 | 2022-03-11 | 国网山东省电力公司淄博供电公司 | Method for improving dynamic range and precision of low-voltage distribution network monitoring terminal measuring current |
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2018
- 2018-09-30 CN CN201811158535.6A patent/CN109116282A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540241A (en) * | 2020-11-30 | 2021-03-23 | 重庆电子工程职业学院 | Non-linear compensation system and method for electric field intensity measurement |
| CN114137468A (en) * | 2021-10-21 | 2022-03-04 | 国网浙江省电力有限公司电力科学研究院 | Method and system for correcting field intensity measured by direct current electric field intensity detector |
| CN114167120A (en) * | 2021-12-14 | 2022-03-11 | 国网山东省电力公司淄博供电公司 | Method for improving dynamic range and precision of low-voltage distribution network monitoring terminal measuring current |
| CN114167120B (en) * | 2021-12-14 | 2023-09-19 | 国网山东省电力公司淄博供电公司 | Method for improving dynamic range and accuracy of measuring current of low-voltage distribution network monitoring terminal |
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