CN106950432A - The multi-frequency inductance measurement method and circuit of a kind of long wire of earth's surface - Google Patents
The multi-frequency inductance measurement method and circuit of a kind of long wire of earth's surface Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2611—Measuring inductance
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Abstract
The invention discloses a kind of long wire multi-frequency inductance measurement method of earth's surface and circuit, basic fundamental design of the invention is：Connected with the measuring resistance and known voltage signal source of known resistance with the long lead inductance of measured two-terminal-grounding and constitute a series loop, and direct current and Alternating Current Power Supply are carried out to above-mentioned loop respectively, the resistance value and inductance value of the long wire of two-terminal-grounding are tried to achieve respectively, and the inductance value of the long wire of two-terminal-grounding under each frequency operating mode can just be calculated respectively to the harmonic signal that loop loads different frequency.It is an advantage of the invention that：Measuring principle of the present invention is easy and effective, system architecture simple and good stability, is adapted to the operation of field complex environment；The present invention is easily programmed and forms the subsystem of automatic measurement；And be able to can just complete to measure work as system power supply by the use of 12 volts or 24 overhead accumulators, portable devices are good.
Description
Technical field
The present invention relates to a kind of long wire multi-frequency inductance measurement method of earth's surface and circuit, belong to electron electric power technology neck
Domain.
Background technology
At present, in geophysical exploration engineering, the long wire up to thousands of meters of two-terminal-groundings usually is laid in earth's surface, as
The antenna of electromagenetic wave radiation is by electromagnetic radiation to receiving area.Power supply highest frequency on the long wire of two-terminal-grounding is typically reachable
Tens KHz, or reach 100KHz.Under high frequency operating mode, the inductance parameters of long wire are the important of this kind of power supply region
Parameter.In the current supply circuit of two-terminal-grounding, earth resistance typically can be controlled in 100 ohms, still, in high frequency operating mode
Under, such as 100KHz, the induction reactance of the inductance characteristic generation of long wire, up to several thousand ohms, high frequency operating mode electric current declines 1-2 quantity
Level.So, in order to design the radiating antenna loop of the long wire of two-terminal-grounding, it is necessary to enter to the long wire of two-terminal-grounding laid
Row inductance measurement.For example, Publication No. CN205898896U patent discloses a kind of RLC testers based on STM32, it is wrapped
Include：Measuring circuit, range switch circuit, key circuit, embedded Control circuit, liquid crystal screen module.Described measuring circuit bag
Containing resistance measuring circuit, capacitance measurement circuit and inductance measurement circuit；Described range switch circuit is selected by multi-channel analog
Switch CD4052 is selected, the conversion of measurement classification is realized；Described key circuit be by by key control it is embedded come select measurement
Component classification, range switching and control multidiameter option switch；Described embedded Control circuit is used to enter measuring circuit
Row control, exports measurement data；Described liquid crystal screen module is used to show last measurement result.For example, Publication No.
CN205427011U patent discloses a kind of Multi-functional digital display frequency meter, including measurement end, switching circuit, resistance measurement electricity
Road, capacitance measurement circuit, inductance measurement circuit, frequency measurement circuit, main controller and display circuit, the measurement end are used to connect
Element under test, the output end of measurement end connects resistance measuring circuit, capacitance measurement circuit and inductance measurement electricity via switching circuit
The input on road, the output end of resistance measuring circuit, capacitance measurement circuit and inductance measurement circuit is all connected with frequency measurement circuit
Input, frequency measurement circuit output end connection main controller, main controller output end connection display circuit.For example, open
Number disclose a kind of voice reading universal meter for CN205210159U patent, including test pencil, single-chip microcomputer and respectively with single-chip microcomputer
Connected tension measuring circuit, current measurement circuit, resistance measuring circuit, are characterized in that：Also include respectively with single-chip microcomputer
Connected voice synthetic module, frequency measurement circuit, temperature-measuring module, capacitance measurement circuit, inductance measurement circuit and waveform
Generation circuit, voice synthetic module connection loudspeaker, the test pencil connects wave generator circuit, and test pencil is provided with and single-chip microcomputer
Connected locking reading button and voice reading button.
It is the all-in resistance composition principle schematic diagram of resistance and inductor loop as shown in Figure 1.R represents the resistance of pure resistance in Fig. 1
Anti- reference axis, RLRepresent the reference axis of the induction reactance of pure inductance.RResistanceIt is the resistance of series resistance, RSenseIt is the induction reactance of inductance, RAlwaysIt is electricity
Resistance and the total impedance of inductance series circuit.Under high frequency operating mode, RSenseBe sized to reach RResistanceDecades of times, seriously reduce back
Under the high-frequency emission efficiency on road, high frequency operating mode, the induction reactance of inductance turns into the main impedance in loop.The theoretical formula and reality of inductance
Measurement all shows that the inductance value of long wire is a constant for working frequency, or not is the change with working frequency
One physical quantity.It is therefore necessary under multiple frequency operating modes in working frequency range, the long wire of two-terminal-grounding of laying is carried out
The field survey of inductance.
The emission system of existing geophysics electromagnetic prospecting instruments, the highest of the working frequency used is not more than
10kHz.In fact, the optimum frequency for Shallow High Resolution electromagnetic prospecting should be a series of frequencies since 100kHz
Rate.So, it is the high frequency not yet covered by the emitter of geophysics electromagnetic prospecting instruments from 10KHz to 100KHz at present
Section.The corresponding depth of exploration of this frequency range, with shallow, is that today's society mankind's activity is related to most frequent depth at 100 meters.10KHz
Machine covering is not launched to 100KHz frequency ranges, is because to the inductance characteristic of the long wire of two-terminal-grounding, particularly high band is more
Inductance characteristic research under frequency is inadequate.So, research has been invented for laying the long wire with the two-terminal-grounding of earth's surface, many
The method that its inductance value carries out accurate measurement is carried out under individual frequency.
In theory, the inductance value of long wire can be calculated.In fact, the length for being laid in the two-terminal-grounding of earth's surface is led
Line, its inductance value is related to working frequency, also with wire underground and neighbors around even distally under stratum electrical conductivity and
Magnetic conductivity is closely related.Calculate greatest difficulty duration wire underground and neighborhood the underground even distant place stratum of long lead inductance
Electromagnetic parameter is unknown, and the electromagnetic parameter on stratum in underground is also distributed in three dimensions, and this allows for the inductance of long wire
Calculate, technically become hardly possible.So, want to obtain the inductance value of the long wire of two-terminal-grounding, can only be by the spot
The technical scheme of measurement.
Fig. 2 is relation schematic diagram of the long wire of two-terminal-grounding with subsurface formations unit for being laid in earth's surface.Due to calculating length
The magnetic field that current in wire is produced needs to be related to the electrical parameter of the electrical conductivity in space and magnetic conductivity, so, long wire underground
The magnetic field that the Electrical distribution of layer will be produced to long current in wire in space forms the influence determined.
P1, p2 and p3 represent the stratigraphic unit of different electromagnetic properties respectively in Fig. 2.It is to lay two with earth's surface on earth's surface
Hold the long wire of ground connection.Long lead inductance and the magnetic field intensity positive correlation that nearby earth's surface is produced of electric current on wire, and earth's surface magnetic
Field intensity and the electrical conductivity of subsurface formations, the electromagnetic parameter of magnetic conductivity are closely related.Because different frequency electromagnetic wave is toward underground
Coupling depth is different, and the stratum electromagnetic property that different frequency electromagnetic wave is coupled to also is varied from, and has resulted in different frequency work
Under condition, the inductance value of the long wire of same is different.
The content of the invention
It is an object of the invention to provide a kind of multi-frequency inductance for the long wire of earth's surface that can overcome above-mentioned technical problem
Measuring method and circuit.The basic fundamental of the present invention is conceived：With the measuring resistance and known voltage signal source of known resistance
Connected with the long lead inductance of measured two-terminal-grounding and constitute a series loop, and direct current is carried out to above-mentioned loop respectively
And Alternating Current Power Supply, the resistance value and inductance value of the long wire of two-terminal-grounding are tried to achieve respectively, and the harmonic wave that different frequency is loaded to loop is believed
Number the inductance value of the long wire of two-terminal-grounding under each frequency operating mode can be just calculated respectively.
The present invention the long wire of earth's surface multi-frequency inductance measurement method the step of be：
(1) under DC condition and operating mode, the long wire of earth's surface only shows the feature of pure resistance, by loading direct current
Voltage on electric current, the output voltage of difference accurate measurement supplying cell and the measuring resistance of series connection；
(2) and then voltage on the long wire of the earth's surface is obtained；
(3) and then the i.e. long wire D.C. resistance of the corresponding pure resistance value of the long wire of the earth's surface is obtained；
(4) under under AC conditions and operating mode, the long wire of earth's surface shows emotional resistance, i.e., the described long wire of earth's surface
Induction reactance, because impedance and induction reactance differ 90 ° of phases, so the mode that can be synthesized and decompose according to impedance and induction reactance；According to
The output voltage of voltage drop and battery in measuring resistance calculates the inductance value of the long wire of earth's surface under working frequency.
The inductance of the long wire of earth's surface is gone back and institute in addition to the physical parameter with the wire of conductor length in itself is relevant
State subsurface formations rock conductivity, the parameter correlation of magnetic conductivity of the long wire position of earth's surface.By different operating frequency institute
The underground medium depth of coupling is different, and the parameter of underground deep formation rock electrical conductivity magnetic conductivity is change, so, it is described
The inductance of the long wire of earth's surface is except about in addition to being also related also to working frequency to physical parameter.Therefore, it is necessary to measure
The inductance value of the long wire of earth's surface at different frequencies.
To a certain frequency, the long wire of the earth's surface is connected with the measuring resistance of known resistance, then supplied to series loop
Electricity.The voltage in output voltage and the measuring resistance is measured, with regard to that can calculate what the long wire of the earth's surface was obtained as inductance
The induction reactance of inductance is obtained in voltage drop, the voltage drop then obtained according to the inductance tried to achieve, recycles induction reactance under the conditions of given frequency
Computing formula calculates the inductance value of the long wire of the earth's surface.
The multi-frequency inductance measurement circuit of the long wire of earth's surface of the present invention includes：The long wire DC resistance measurement circuit of earth's surface
With the long lead inductance measuring circuit of earth's surface；Dc source of the long wire DC resistance measurement circuit of earth's surface including series connection,
The resistance of the long wire left end earthing or grounding means of table, the long wire of earth's surface resistance in itself, the resistance of the long wire right-hand member earthing or grounding means of earth's surface,
The measuring resistance of known resistance is long by the resistance of the long wire left end earthing or grounding means of earth's surface, the long wire of earth's surface resistance in itself, earth's surface
The resistance of wire right-hand member earthing or grounding means merges into the all-in resistance of transmitting antenna, and the all-in resistance of the transmitting antenna is that the earth's surface is long
The resistance summation of the resistance of wire and the long wire two-terminal-grounding device of the earth's surface.
The long lead inductance measuring circuit of earth's surface includes the AC power, measuring resistance of known resistance, described of series connection
The long lead inductance of the all-in resistance of transmitting antenna, earth's surface.The all-in resistance of the transmitting antenna be the long wire of the earth's surface resistance and
The resistance summation of the long wire two-terminal-grounding device of earth's surface, i.e. the all-in resistance transmitting antenna of the transmitting antenna direct current
Resistance.
It is an advantage of the invention that：Measuring principle of the present invention is easy and effective, system architecture simple and good stability, is adapted to field
Complex environment is operated；The present invention is easily programmed and forms the subsystem of automatic measurement；And 12 volts or 24 volts storages can be utilized
Battery can just complete to measure work as system power supply, and portable devices are good.
Brief description of the drawings
Fig. 1 is the all-in resistance composition principle schematic diagram of resistance and inductor loop；
Fig. 2 is relation schematic diagram of the long wire of two-terminal-grounding with subsurface formations unit for being laid in earth's surface；
Fig. 3 is the layout diagram for the long wire of two-terminal-grounding for being laid in earth's surface；
Fig. 4 is the long wire radiating circuit of two sides earth earth's surface；
Fig. 5 is the long structure chart of wire DC resistance measurement circuit embodiment one of earth's surface；
Fig. 6 is the long structure chart of wire DC resistance measurement circuit embodiment two of earth's surface；
Fig. 7 is the long lead inductance measuring circuit of earth's surface.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.The multi-frequency of the long wire of earth's surface of the present invention
The step of inductance measurement method is：
(1) under DC condition and operating mode, the long wire of earth's surface only shows the feature of pure resistance, by loading direct current
Voltage on electric current, the output voltage of difference accurate measurement supplying cell and the measuring resistance of series connection；
(2) and then voltage on the long wire of the earth's surface is obtained；
(3) and then the corresponding pure resistance value of the long wire of the earth's surface is obtained；
(4) under under AC conditions and operating mode, the long wire of earth's surface shows emotional resistance, i.e., the described long wire of earth's surface
Induction reactance, because impedance and induction reactance differ 90 ° of phases, so the mode that can be synthesized and decompose according to impedance and induction reactance；According to
The output voltage of voltage drop and battery in measuring resistance calculates the inductance value of the long wire of earth's surface under working frequency.
The inductance of the long wire of earth's surface is gone back and institute in addition to the physical parameter with the wire of conductor length in itself is relevant
State subsurface formations rock conductivity, the parameter correlation of magnetic conductivity of the long wire position of earth's surface.By different operating frequency institute
The underground medium depth of coupling is different, and the parameter of underground deep formation rock electrical conductivity magnetic conductivity is change, so, it is described
The inductance of the long wire of earth's surface is except about in addition to being also related also to working frequency to physical parameter.Therefore, it is necessary to measure
The inductance value of the long wire of earth's surface at different frequencies.
To a certain frequency, the long wire of the earth's surface is connected with the measuring resistance of known resistance, then supplied to series loop
Electricity.The voltage in output voltage and the measuring resistance is measured, with regard to that can calculate what the long wire of the earth's surface was obtained as inductance
The induction reactance of inductance is obtained in voltage drop, the voltage drop then obtained according to the inductance tried to achieve, recycles induction reactance under the conditions of given frequency
Computing formula calculates the inductance value of the long wire of the earth's surface.
The multi-frequency inductance measurement circuit of the long wire of earth's surface of the present invention includes：The long wire DC resistance measurement circuit of earth's surface
With the long lead inductance measuring circuit of earth's surface；Dc source of the long wire DC resistance measurement circuit of earth's surface including series connection,
The resistance of the long wire left end earthing or grounding means of table, the long wire of earth's surface resistance in itself, the resistance of the long wire right-hand member earthing or grounding means of earth's surface,
The measuring resistance of known resistance is long by the resistance of the long wire left end earthing or grounding means of earth's surface, the long wire of earth's surface resistance in itself, earth's surface
The resistance of wire right-hand member earthing or grounding means merges into the all-in resistance of transmitting antenna, and the all-in resistance of the transmitting antenna is that the earth's surface is long
The resistance summation of the resistance of wire and the long wire two-terminal-grounding device of the earth's surface.
The long lead inductance measuring circuit of earth's surface includes the AC power, measuring resistance of known resistance, described of series connection
The long lead inductance of the all-in resistance of transmitting antenna, earth's surface.The all-in resistance of the transmitting antenna be the long wire of the earth's surface resistance and
The resistance summation of the long wire two-terminal-grounding device of earth's surface, i.e. the all-in resistance transmitting antenna of the transmitting antenna direct current
Resistance.
Two ends fill for ground connection in the layout diagram of the long wire of the two-terminal-grounding for being laid in earth's surface as shown in Figure 3, Fig. 3
Put, centre is signal emitting-source, the long wire connection two-terminal-grounding device of earth's surface.
The earth resistance sum of the resistance of the long wire of earth's surface described in Fig. 3 and two-terminal-grounding device is designated as R, then will can be schemed
1 electrical connection is simplified to Fig. 4 circuit.
As shown in figure 4, POW is system transmitter in Fig. 4, R is the long conductor resistance of the earth's surface and two-terminal-grounding resistance
Summation, L is the inductance of the long wire of the earth's surface, and both are unknown number.Designing a circuit first, to ask for loop respectively always electric
R is hindered, another circuit is then redesigned and carrys out survey calculation inductance value L.First with the long wire of the earth's surface as shown in Figure 5
DC resistance measurement circuit measures the long wire all-in resistance of the earth's surface.
As shown in figure 5, POW is dc source, R in Fig. 5Left ground connectionFor the resistance of the long wire left end earthing or grounding means of the earth's surface,
RWireFor the resistance of the long wire of the earth's surface in itself, RRight ground connectionFor the resistance of the long wire right-hand member earthing or grounding means of the earth's surface, R0It is known
The measuring resistance of resistance, by RLeft ground connection、RWireAnd RRight ground connectionThree resistance are merged into the all-in resistance of transmitting antenna, are designated as RAlways, then can use
Fig. 6 replaces Fig. 5.
As shown in fig. 6, in Fig. 6, POW is dc source, and R is always the all-in resistance of transmitting antenna, R always unknown resistance, R0
For the measuring resistance of known resistance.
Direct current, accurate measurement dc source POW output voltage V are loaded to Fig. 6 circuitPOWWith measuring resistance R0Two
The potential difference V at end0, loop current can be calculated using formula：
I0=V0/R0 (1)
In formula (1), I0It is the current strength in loop, V0It is the potential difference of standard resistor at two terminals, R0It is the resistance of measuring resistance
Value.
Now, the potential difference at transmitting antenna two ends is：
VMy god=VPOW-V0 (2)
V in formula (2)My godIt is the voltage drop at transmitting antenna two ends, VPOWIt is the output voltage of dc source, V0It is measuring resistance
The potential difference at two ends.
It is thus, it is possible to the all-in resistance for calculating transmitting antenna：
RAlways=(VPOW-V0)/I0 (3)
In formula (3), RAlwaysBe transmitting antenna two ends including earth resistance combined potential it is poor, VPOWIt is direct current in loop
The output voltage of power supply, V0It is the potential difference at loop Plays resistance two ends, I0It is the electric current in loop.
By above-mentioned measurement and calculation process, it can calculate including two-terminal-grounding resistance in the total straight of interior transmitting antenna
Leakage resistance.
As shown in fig. 7, Fig. 7 is the circuit diagram for measuring long lead inductance.In Fig. 7, POW is AC power, R0It is known resistance
The measuring resistance of value, R always represents the resistance summation i.e. all-in resistance of transmitting antenna of the long wire of the earth's surface and two-terminal-grounding device
That is the D.C. resistance of transmitting antenna, V1RMSIt is the virtual value of AC power output signal voltage, V0RMSIt is that letter is exchanged in measuring resistance
Number voltage effective value, L represents the i.e. described long lead inductance of earth's surface of the inductance of antenna, is unknown amount to be measured.
Two voltmeters measure the virtual value V of the output signal voltage of AC power respectively in Fig. 71RMSIn measuring resistance
The virtual value V of AC signal voltage0RMS.Described two voltage effective value V1RMSAnd V0RMSUse VRMSSpecial measurement chip is surveyed
Amount.The special measurement chip measures the voltage effective value of input signal, exports the analog level signal of virtual value, recycles logical
A/D converter circuit can be measured that the virtual value V of the output signal voltage of AC power1RMSLetter is exchanged with measuring resistance
The virtual value V of number voltage0RMS。
The measuring process of the inductance of the long wire of earth's surface is to load measurement frequency signal to Fig. 7 circuit, then measure
The output voltage virtual value V of AC signal power supply1RMSWith the voltage effective value V of standard resistor at two terminals AC signal0RMS.Recycle
Below equation step, then can calculate the inductance value of long wire.
(a) counter circuit current effective value IRMS：
IRMS=V0RMS/R0(4)
In formula (4), IRMSFor AC signal current intensity virtual value, V in loop0RMS/ it is AC signal in measuring resistance
Voltage effective value, R0It is the resistance of measuring resistance.
(b) the AC signal voltage effective value at antenna resistance two ends is calculated, the antenna resistance is the long conductor resistance of earth's surface：
The current signal of antenna resistance and measuring resistance same-phase, the AC signal voltage effective value V of antenna resistanceARMSWith
Following equation is calculated.
VARMS=IRMS*RAlways (5)
(c) the AC signal voltage effective value of antenna resistance inductance is calculated：
Because the AC signal on inductance differs 90 ° of phases with AC signal on resistance, both voltage synthesis meet arrow
Composition principle is measured, i.e.,
And then export, VLRMSComputing formula
(d) the induction reactance value of antenna is calculated：
Calculate the voltage effective value and loop current of inductance, it becomes possible to calculate the induction reactance value of the long wire of the earth's surface.
RL=VLRMS/IRMS (8)
In formula (8), RLIt is the induction reactance of the i.e. described long wire of earth's surface of antenna induction reactance, VLRMSIt is inductance both end voltage virtual value,
IRMSIt is loop current virtual value.
(e) inductance value of antenna is calculated：
L=RL/2πf (9)
In formula (9), L is the inductance of the long wire of the earth's surface, RLIt is the induction reactance of the long wire of the earth's surface, f is measurement work
Frequency.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art is in scope disclosed by the invention, and the change or replacement that can be readily occurred in should all be contained
Lid is within the scope of the invention as claimed.
Claims (6)
1. a kind of multi-frequency inductance measurement method of the long wire of earth's surface, it is characterised in that comprise the following steps：
(1) under DC condition and operating mode, the long wire of earth's surface only shows the feature of pure resistance, by loading direct current
Voltage on stream, the output voltage of difference accurate measurement supplying cell and the measuring resistance of series connection；
(2) and then voltage on the long wire of the earth's surface is obtained；
(3) and then the i.e. long wire D.C. resistance of the corresponding pure resistance value of the long wire of the earth's surface is obtained；
(4) under under AC conditions and operating mode, the long wire of earth's surface shows emotional resistance, i.e., the sense of the described long wire of earth's surface
It is anti-, due to impedance and induction reactance 90 ° of phases of difference, so the mode that can be synthesized and decompose according to impedance and induction reactance；According to standard
The output voltage of ohmically voltage drop and battery calculates the inductance value of the long wire of earth's surface under working frequency.
2. the multi-frequency inductance measurement method of the long wire of a kind of earth's surface according to claim 1, it is characterised in that describedly
The inductance of the long wire of table is in addition to the physical parameter with the wire of conductor length in itself is relevant, also with the long wire institute of the earth's surface
The parameter of subsurface formations rock conductivity, magnetic conductivity in position is related.
3. the multi-frequency inductance measurement method of the long wire of a kind of earth's surface according to claim 1, it is characterised in that due to not
The underground medium depth coupled with working frequency is different, and the parameter of underground deep formation rock electrical conductivity magnetic conductivity is change
, so, the inductance of the long wire of earth's surface is except about in addition to being also related also to working frequency to physical parameter.
4. the multi-frequency inductance measurement method of the long wire of a kind of earth's surface according to claim 1, it is characterised in that also to survey
Measure the inductance value of the long wire of earth's surface at different frequencies.
5. the multi-frequency inductance measurement method of the long wire of a kind of earth's surface according to claim 1, it is characterised in that to a certain
Frequency, the long wire of the earth's surface is connected with the measuring resistance of known resistance, then powered to series loop, measures output voltage
With the voltage in the measuring resistance, with regard to the voltage drop that the long wire of the earth's surface is obtained as inductance can be calculated, then basis
The induction reactance of inductance is obtained in the voltage drop that the inductance tried to achieve is obtained, and induction reactance computing formula calculates institute under the conditions of recycling given frequency
State the inductance value of the long wire of earth's surface.
6. a kind of multi-frequency inductance measurement circuit of the long wire of earth's surface, it is characterised in that including：The long wire D.C. resistance of earth's surface is surveyed
Measure circuit and the long lead inductance measuring circuit of earth's surface；The long wire DC resistance measurement circuit of earth's surface includes the direct current of series connection
Source, the resistance of the long wire left end earthing or grounding means of earth's surface, the long wire of earth's surface resistance in itself, the long wire right-hand member earthing or grounding means of earth's surface
The measuring resistance of resistance, known resistance, by the resistance of the long wire left end earthing or grounding means of earth's surface, the long wire of earth's surface resistance in itself,
The resistance of the long wire right-hand member earthing or grounding means of earth's surface merges into the all-in resistance of transmitting antenna, and the all-in resistance of the transmitting antenna is described
The resistance summation of the long wire two-terminal-grounding device of resistance and the earth's surface of the long wire of earth's surface；
The long lead inductance measuring circuit of earth's surface includes the AC power, the measuring resistance of known resistance, the transmitting of series connection
The long lead inductance of the all-in resistance of antenna, earth's surface, the all-in resistance of the transmitting antenna is the resistance of the long wire of the earth's surface and described
The resistance summation of the long wire two-terminal-grounding device of earth's surface, i.e. the all-in resistance transmitting antenna of the transmitting antenna direct current
Resistance.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445290A (en) * | 2018-03-14 | 2018-08-24 | 北京无线电计量测试研究所 | A kind of closed loop resistance device resistance value measurement method |
| CN109946525A (en) * | 2019-03-15 | 2019-06-28 | 湖南强军科技有限公司 | A kind of device and method of measurement of Grounding Resistance |
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| CN108445290A (en) * | 2018-03-14 | 2018-08-24 | 北京无线电计量测试研究所 | A kind of closed loop resistance device resistance value measurement method |
| CN109946525A (en) * | 2019-03-15 | 2019-06-28 | 湖南强军科技有限公司 | A kind of device and method of measurement of Grounding Resistance |
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