CN102175927B - System for measuring intensity of electromagnetic field and method for same - Google Patents
System for measuring intensity of electromagnetic field and method for same Download PDFInfo
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- CN102175927B CN102175927B CN 201110020833 CN201110020833A CN102175927B CN 102175927 B CN102175927 B CN 102175927B CN 201110020833 CN201110020833 CN 201110020833 CN 201110020833 A CN201110020833 A CN 201110020833A CN 102175927 B CN102175927 B CN 102175927B
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Abstract
The invention provides a system for measuring the intensity of electromagnetic field at a position to be measured. The system provided by the invention comprises an electromagnetic field intensity sensor which comprises a first assembly and a second assembly, wherein the first and second assemblies are vertical; the first and second assemblies respectively generate a first signal indicating a first field intensity component of the position to be measured and a second signal indicating a second field intensity component of the position to be measured; the system provided by the invention further comprises a field intensity receiver for receiving the first and second signals and calculating the electromagnetic field intensity value of the position to be measured. The method provided by the invention is operated simply and conveniently; data only needs measuring once; the measurement procedure is fully automatic; the measurement time is greatly shortened; and the working efficiency is improved.
Description
Technical field
The present invention relates to a kind of system for measuring intensity of electromagnetic field and reach the method that is used for it.
Background technology
Measure by force in the industry at external electromagnetic field, the past all adopts tours antenna, dipole antenna, log-periodic antenna isotropic radiation antenna and field strength receiver to come together to measure electromagnetic field intensity.Because the vector property of external electromagnetic field, when adopting traditional directive antenna and field strength receiver to come together to measure electromagnetic field intensity, direction that must manual or servo automatic adjustment these antenna takes multiple measurements to obtain different field intensity data, the field intensity data that then will repeatedly measure compare, select maximum field intensity value, depending on this maximum field intensity value actual field intensity value that is the space point.This system architecture and metering system should not be realized robotization, and measuring speed is slower, and data uncertainty is larger.
Summary of the invention
The purpose of this invention is to provide a kind of electromagnet field strength measurement system and a kind of method that is applied to this system, to overcome the problem of above-mentioned prior art.
According to an aspect of the present invention, provide a kind of system of the electromagnetic field intensity be used to measuring position to be measured, comprising:
The electromagnetic field intensity sensor, it comprises the first assembly and the second assembly,
Described the first assembly comprises:
Be the first tubular shielding shell that the ring with first opening is preferably the shape of annulus; With
Many the first insulated conductors that respectively have head end and tail end, described many first insulated conductors comprise first signal output lead and the first earth lead,
Wherein every the first insulated conductor is through in described the first tubular shielding shell, so that the head end of each root the first insulated conductor is suitable for passing from the same side of described the first opening, and the tail end of each root the first insulated conductor is suitable for passing from the opposite side of described the first opening, the first insulated conductor that is different from described first signal output lead and the first earth lead in described many first insulated conductors in series is electrically connected in the mode of end connector end, and the head end that is not electrically connected with tail end of the first insulated conductor that in series is electrically connected is electrically connected to the tail end of described first signal output lead, the tail end that is not electrically connected with head end of described the first insulated conductor that in series is electrically connected is electrically connected to the head end of described the first earth lead, the head end of described first signal output lead is used for the first signal of the first field intensity component of the described position to be measured of output indication, the tail end ground connection of described the first earth lead
Described the second assembly comprises:
Be the second tubular shielding shell that the ring with second opening is preferably the shape of annulus; With
Many the second insulated conductors that respectively have head end and tail end, described many second insulated conductors comprise secondary signal output lead and the second earth lead,
Wherein every the second insulated conductor is through in described the second tubular shielding shell, so that the head end of each root the second insulated conductor is suitable for passing from the same side of described the second opening, and the tail end of each root the second insulated conductor is suitable for passing from the opposite side of described the second opening, the second insulated conductor that is different from described secondary signal output lead and the second earth lead in described many second insulated conductors in series is electrically connected in the mode of end connector end, and the head end that is not electrically connected with tail end of the second insulated conductor that in series is electrically connected is electrically connected to the tail end of described secondary signal output lead, the tail end that is not electrically connected with head end of described the second insulated conductor that in series is electrically connected is electrically connected to the head end of described the second earth lead, the head end of described secondary signal output lead is used for the secondary signal of the second field intensity component of the described position to be measured of output indication, the tail end ground connection of described the second earth lead
Wherein said the first tubular shielding shell is identical with described the second tubular shielding shell, and be arranged to into 90 the degree and so that, the second opening of the first opening of described the first tubular shielding shell and described the second tubular shielding shell intersects, and the part relative with described the first opening of described the first tubular shielding shell intersects with the part relative with described the second opening of described the second tubular shielding shell, and the quantity of wherein said many first insulated conductors is identical with the quantity of described many second insulated conductors, and
Field strength receiver, described field strength receiver are used for receiving described the first and second signals, and calculate the vector of described the first and second field intensity components and as the electromagnetic field intensity value of described position to be measured based on described the first and second field intensity components.
According to a further aspect in the invention, provide a kind of for the method according to system of the present invention, comprise step:
(i) described system is placed described position to be measured carry out that electromagnetic field intensity is measured so that described the first tubular shielding shell and described the second tubular shielding shell perpendicular to surface level, with the secondary signal of the second field intensity component of the first signal of the first field intensity component of obtaining indicating described position to be measured and the described position to be measured of indication;
(ii) determine described the first field intensity component and the second field intensity component based on described first signal and secondary signal respectively; And
(iii) calculate the vector of described the first and second field intensity components based on described the first and second field intensity components and as the electromagnetic field intensity value of described position to be measured.
Utilize system and a method according to the invention, carry out only needing to carry out one-shot measurement when electromagnetic field intensity is measured and just can obtain required electromagnetic field intensity data, can realize the robotization of measuring process, greatly shortened Measuring Time, simplified operation steps, improved work efficiency, made the measurement of electromagnetic field intensity convenient.
Description of drawings
Hereinafter, by nonrestrictive specific embodiments, by reference to the accompanying drawings, can understand better the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the non-grain oriented magnetic field strength sensor in one embodiment of the invention;
Fig. 2 is the loam cake diagrammatic top view afterwards that the non-grain oriented magnetic field strength sensor among Fig. 1 removes the insulation top box;
Fig. 3 is that the non-grain oriented magnetic field strength sensor among Fig. 1 removes the first half and removes diagrammatic top view after the loam cake of metab;
Fig. 4 is the signal longitudinal section of the metab among Fig. 3;
Fig. 5 is the electromagnetic field intensity all automatic measurement system of systems figure according to one embodiment of the invention;
Fig. 6 shows the principle schematic according to the measuring method of one embodiment of the invention;
Fig. 7 is the schematic diagram of the base panel of non-grain oriented magnetic field strength sensor in one embodiment of the invention.
Embodiment
Fig. 1 shows the schematic diagram according to the non-grain oriented magnetic field strength sensor 100 in one embodiment of the invention.As shown in Figure 1, the first tubular shielding half shell 2, the first tubular shielding half shell 3, the second tubular shielding half shell 4, the second tubular shielding half shell 5 are and are tubular shielding half shell of metal that semi-ring is preferably the shape of semicircular ring.Form in the first tubular shielding half shell 2 and the first tubular shielding half shell 3 XZ plane shown in the figure and be the first tubular shielding shell that the ring with first opening is preferably the shape of annulus, formation is the second tubular shielding shell that the ring with second opening is preferably the shape of annulus in the second tubular shielding half shell 4 and the second tubular shielding half shell 5 YZ plane shown in the figure.In this embodiment, the first tubular shielding shell has the first additional opening in the part relative with the first opening, and the first opening and the first additional opening are limited by two pairs of opposite ends of described two the first tubular shielding half shells respectively; The second tubular shielding shell has the second additional opening in the part relative with described the second opening, and the second opening and the second additional opening are limited by two pairs of opposite ends of described two the second tubular shielding half shells respectively.Metab 6 is used for the opposite end that defines described the first opening pair of fixing described two the first tubular shielding half shells, and the opposite end that defines described the second opening of described two the second tubular shielding half shells pair.Preferably, this system also comprises an insulation top box 1, it is used for the opposite end pair of fixing described two the first tubular shielding half shells 2, restriction the first additional opening of 3, and the opposite end of described two the second tubular shielding half shells 4, restriction the second additional opening of 5 pair.The plane at the plane at the first tubular shielding shell place and the second tubular shielding shell place is in a fixed angle, and it is preferably 90 degree.Preferably, described base and described shell are metals.
Fig. 2 is the loam cake diagrammatic top view afterwards that the non-grain oriented magnetic field strength sensor among Fig. 1 removes insulation top box 1.As shown in Figure 2, insulating sleeve 7,8 intersects from insulation top box 1 internal vertical and passes, and insulating sleeve 7,8 with and interior wire all do not join insulation top box 1 is interior each other.As shown in Figure 2, tubular shielding half shell 2 and tubular shielding half shell 3 inside that form annular are insulating sleeve 7, and tubular shielding half shell 4 of formation annular and the inside of tubular shielding half shell 5 are insulating sleeve 8.
Fig. 3 is that the non-grain oriented magnetic field strength sensor among Fig. 1 removes the first half and removes diagrammatic top view after the loam cake of metab 6.As shown in Figure 3, forming annular tubular shielding half shell 2 and tubular shielding half shell 3 inside is that 7, seven the first insulated conductors 9 of insulating sleeve are placed in the insulating sleeve 7; Forming tubular shielding half shell 4 of annular and the inside of tubular shielding half shell 5 is that 8, seven the second insulated conductors 10 of insulating sleeve are placed in the insulating sleeve 8.The head end 12 of every the first insulated conductor 9 is suitable for passing from the same side of described the first opening, and the tail end 13 of every the first insulated conductor 9 is suitable for passing from the opposite side of described the first opening.The head end 14 of every the second insulated conductor 10 is suitable for passing from the same side of described the second opening, and the tail end 15 of every the second insulated conductor 10 is suitable for passing from the opposite side of described the second opening.Measure the medium short wave field for example at least during the signal of 150KHz in this frequency range of 30MHz at needs, system of the present invention preferably need at insulating sleeve 7 or 8 interior uses the wire more than 7.Therefore, preferably, the quantity of described many first insulated conductors is more than 7 or 7, and the quantity of described many second insulated conductors is more than 7 or 7.The second opening of the first opening of described the first tubular shielding shell and described the second tubular shielding shell intersects, and the part relative with described the first opening of described the first tubular shielding shell is crossing with the part relative with described the second opening of described the second tubular shielding shell.Be built-in with signal at metab 6 and select and treatment circuit 11, hereinafter be described in connection with Fig. 5.
Fig. 4 is the signal longitudinal section that the metab 6 among Fig. 3 cuts along the plane of tubular shielding half shell 4 and 5 formation of tubular shielding half shell, shows the electrical connection of metab 6 inside.In Fig. 4, ● the expression electric connecting point.As shown in Figure 4, insulated conductor 10 in metab 6 comprises that (node A1T (12) is the head end of this wire to first signal output lead A1, node A1W is the tail end of this wire), (node A2T is the head end of this wire to wire A2, node A2W is the tail end of this wire), (node A3T is the head end of this wire to wire A3, node A2W is the tail end of this wire), (node A4T is the head end of this wire to wire A4, node A4W is the tail end of this wire), (node A5T is the head end of this wire to wire A5, node A5W is the tail end of this wire), (node A6T is the head end of this wire to wire A6, node A6W is the tail end of this wire) and the first earth lead A7 (node A7T is the head end of this wire, and node A7W (13) is the tail end of this wire) totally seven insulated conductors; Node A1T (12) connects the head end of first signal output lead for the first signal of the first field intensity component of output indication position to be measured---and its also is simultaneously an input end of signal selection and treatment circuit, the direct connected node A2T of node A1W; Wire A2, A3, A4, A5 and A6 successively tail end and head end join, preferably, each phase contact between them connects a resistor to ground 17, ground 17 is the base betal can in this preferred embodiment, the resistance of this resistor is 250-350 ohm, more preferably, the resistance of this resistor is 300 ohm; Node A6W and A7T directly join; Node A7W (13) is the tail end of A7, its ground connection 17 (being the betal can of base 6 in this embodiment).Insulated conductor 9 in metab 6 comprises that (Node B 1T (14) is the head end of this wire to secondary signal output lead B1, Node B 1W is the tail end of this wire), (Node B 2T is the head end of this wire to wire B2, Node B 2W is the tail end of this wire), (Node B 3T is the head end of this wire to wire B3, Node B 3W is the tail end of this wire), (Node B 4T is the head end of this wire to wire B4, Node B 4W is the tail end of this wire), (Node B 5T is the head end of this wire to wire B5, Node B 5W is the tail end of this wire), (Node B 6T is the head end of this wire to wire B6, B6W is the tail end of this wire), (Node B 7T is the head end of this wire to the second earth lead B7, Node B 7W (15) is the tail end of this wire) totally seven insulated conductors; Node B 1T (14) connects the head end of secondary signal output lead for the secondary signal of the second field intensity component of output indication position to be measured---and its also is simultaneously another input end of signal selection and treatment circuit, the direct connected node B2T of Node B 1W; Wire B2, B3, B4, B5 and B6 successively tail end and head end join, preferably, each phase contact between them connects a resistor to ground 17 (base betal cans), and described resistor can have any resistance value in 250 ohm of-350 ohm of scopes, is preferably 300 ohm; Wire B6W and B7T directly join; Node B 7W (15) ground connection 17 (betal can of base 6).The first insulated conductor 9 is mutual without being connected with the second insulated conductor 10.Although in this embodiment, for the first insulated conductor 9, head end 12 (A1T) is used for signal output, tail end 13 (A7W) ground connection, but those skilled in the art can understand, and also can select head end 12 (A1T) ground connection, and tail end 13 (A7W) is used for signal output.Similarly, for the second insulated conductor 10, head end 14 (B1T) also can be used for ground connection, and tail end 15 (B7W) also can be used for signal output.Non-grain oriented magnetic field strength sensor according to one embodiment of the invention, preferably by connect over the ground the resistor of a fair-sized at the mutual connection Nodes of the wire except signal output lead and earth lead, the waveform of the smooth field intensity signal that records at the mutual connection Nodes, eliminated the harmonic peak of the field intensity signal that records, so that the gain of the signal of different frequency is identical, can obtain more accurately measurement data at the mutual connection Nodes.
Fig. 5 is electromagnetic field intensity all automatic measurement system of systems figure according to a preferred embodiment of the invention.In the drawings, non-grain oriented magnetic field strength sensor 100 is preferably selected and treatment circuit 11 via signal, by data cable line 71 and control cables line 72, links to each other with field strength receiver 73.Described field strength receiver 73 is selected to be connected to the head end 12 of described first signal output lead and the head end 14 of described secondary signal output lead with treatment circuit 11 by described signal, the head end 12 connected node A1T of first signal output lead wherein, being used for receiving described first signal also is the first field intensity component value, and the head end 14 connected node B1T of secondary signal output lead, being used for receiving described secondary signal also is the second field intensity component value.Field strength receiver 73 calculates the vector of described the first and second field intensity components based on described the first and second field intensity components and as the electromagnetic field intensity value of described position to be measured.Field strength receiver 73 preferably includes: receiving circuit 74, and it links to each other to receive the signal from data cable line 71 with data cable line 71; Control circuit 75, it links to each other with control cables line 72 and selects and treatment circuit 11 so that control code is sent to signal by control cables line 72; And CPU76, it links to each other with control circuit 75 with receiving circuit 74, described CPU76 receives the signal from receiving circuit 74, according to this signal, described CPU76 produces control code by sensor control and data processing software, and control code is sent to control circuit 75, by control circuit 75 control code is sent to signal and select and treatment circuit, it will be further described hereinafter.
Preferably also comprise signal selection and treatment circuit 11 in non-grain oriented magnetic field strength sensor 100, it places in the metab 6, as shown in Figure 3.Field strength receiver can be connected to signal and select and treatment circuit 11.Signal is selected preferably to be comprised of signal selecting circuit (not shown) and signal amplification circuit (not shown) two parts with treatment circuit 11, wherein signal selecting circuit comprises a relay (not shown), it receives the control code from the control circuit 75 of field strength receiver, thereby to select be to send to described signal amplification circuit with the signal of the head end A1T (12) of described first signal output lead or with the signal of the head end B1T (14) of described secondary signal output lead; And described signal amplification circuit is used for amplification from the signal of described signal selecting circuit and the signal after will amplifying is sent to described field strength receiver by data cable line 71.In this embodiment, described relay has been realized, the head end of described first signal output lead and the head end of described secondary signal output lead are electrically connected to described signal selection and treatment circuit in turn, and the head end of the head end of described first signal output lead and described secondary signal output lead is electrically connected to described field strength receiver in turn thus.
Fig. 6 shows the principle schematic of measuring method according to a preferred embodiment of the invention.The base plane of described non-grain oriented magnetic field strength sensor is parallel to surface level, with arbitrarily angled placement, measures, and obtains two field intensity component A take dB μ V/m as unit, the value of B.Get field intensity component value A, a large value among the B (A, B then get this equal value when equating), this value is decided to be bigness scale value t.Have error x between the accurate measurement value of bigness scale value t and field intensity C to be measured, x value scope is 0 to 3dB μ V/m.Finding after deliberation the absolute value of difference of two values of x value and field intensity component A and field intensity component B | there is one to one relation as shown in table 1 in A-B|, and should relation all irrelevant with actual measurement environment, electromagnetic field intensity to be measured.
Table 1
| |A-B|(dB) | 22.2 | 21.16 | 18.22 | 15.07 | 13.08 | 11.44 | 10.29 | 9.76 | 8.78 | 8.32 | 7.65 | 7.23 |
| x | 0 | 0.03 | 0.06 | 0.13 | 0.21 | 0.30 | 0.39 | 0.44 | 0.54 | 0.6 | 0.69 | 0.75 |
| 6.63 | 6.24 | 5.86 | 5.48 | 5.12 | 4.77 | 4.42 | 4.08 | 3.75 | 3.42 | 3.1 | 2.77 | 2.62 | 2.46 |
| 0.85 | 0.93 | 1 | 1.08 | 1.16 | 1.25 | 1.34 | 1.43 | 1.53 | 1.63 | 1.73 | 1.84 | 1.9 | 1.95 |
| 2.3 | 2.14 | 1.99 | 1.83 | 1.68 | 1.52 | 1.37 | 1.22 | 1.06 | 0.91 | 0.76 | 0.61 | 0.46 | 0.3 |
| 2.01 | 2.07 | 2.13 | 2.19 | 2.25 | 2.31 | 2.38 | 2.44 | 2.51 | 2.58 | 2.65 | 2.72 | 2.79 | 2.86 |
| 0.15 | 0 |
| 2.94 | 3 |
Obtain modified value x by tabling look-up, the value of field intensity C to be measured can be calculated by C=t+x, and the C that obtains with the method is the accurate measurement value.
The principle of this method is: the value of field intensity component A for the field intensity value of plane, wire 9 place vertical direction; The value of field intensity component B is the field intensity value with plane, wire 10 place vertical direction.Because wire 9 becomes 90 degree with wire 10 angles, therefore field intensity component A and field intensity component B direction quadrature (at an angle of 90), therefore, if the value of field intensity component A and B is definite, then the greater t among field intensity component A and the B (being A in Fig. 6) just has been determined with the angle [alpha] of field intensity C to be measured.Simultaneously, the absolute value of the difference of field intensity component value A and field intensity component value B is definite, and the difference of field intensity C to be measured and t also is that modified value x also determines.Thereby, in the situation that only known A and B, can calculate A and B institute respective components vector and value, C namely.
When measured value take dB μ V/m during as unit, the concrete derivation of described method is as follows:
|A-B|＝201gC cosα-201gC sinα＝201g cotα
x＝201gC-201gC cosα＝-201g cosα
This shows, modified value x is only relevant with angle [alpha].When A and B determine, α has also just determined, the absolute value of the difference of while field intensity component value A and field intensity component value B | A-B| also determines, therefore, preferably, can set up in advance poor absolute value | the corresponding relation between A-B| and the modified value x, determine and the absolute value of the difference of different field intensity component value based on corresponding relation | the corresponding modified value x of A-B| obtains the tabulation of x value as shown in table 1.
Preferably, in practical operation, the CPU76 of field strength receiver 73 produces control code by sensor control and data processing software, and control code is sent to control circuit 75, control circuit 75 sends to signal with control code and selects and treatment circuit 11, it is to be electrically connected to described signal amplification circuit with the head end A1T (12) of described first signal output lead or with the head end B1T (14) of described secondary signal output lead that signal is selected to select according to this control code with treatment circuit 11, and described signal amplification circuit is used for amplification from the signal of described signal selecting circuit and the signal after will amplifying is sent to described field strength receiver by data cable line 71, thereby record the value of field intensity component A or B.When signal selecting circuit selects head end A1T (12) with described first signal output lead when being connected to signal amplification circuit, record the value of field intensity component A, select head end B1T (14) with described secondary signal output lead when being connected to signal amplification circuit when signal selecting circuit, record the value of field intensity component B.When the value of strong component A and field intensity component B has all recorded, calculate the absolute value of both differences then and there | A-B|, according to | A-B| tables look-up and obtains modified value x.
Thereby, in the situation of the value that only records A and B, can try to achieve by C=t+x the value of field intensity C to be measured.Said process is finished by moving sensor control and data processing software automatically by CPU76, thereby has realized all automatic measurement to electromagnetic field intensity.
Fig. 7 is the schematic diagram of base panel of the metab 6 of non-grain oriented magnetic field strength sensor 100 in one embodiment of the invention, there is shown the upper plane of metab 6.As seen from the figure, the upper plane of metab 6 comprises data cable line interface 81 and control cables line interface 82.Data cable line interface 81 has connected data cable line 71.Control cables line interface 82 has connected control cables line 72 and power lead 83, and control cables line 72 is connected to described relay, and power lead 83 is described non-grain oriented magnetic field strength sensor power supply.
Take multiple measurements with the system that adopts traditional directive antenna and receiver to form and data to be compared the peaked measuring method of selecting field intensity compare afterwards, the present invention is easy and simple to handle, only need to measure a secondary data, measuring process realizes full-automatic, greatly shorten Measuring Time, improved work efficiency.
Claims (21)
1. for the system of the electromagnetic field intensity of measuring position to be measured, comprising:
The electromagnetic field intensity sensor, it comprises the first assembly and the second assembly,
Described the first assembly comprises:
The the first tubular shielding shell that is the shape of the ring with first opening; With
Many the first insulated conductors that respectively have head end and tail end, described many first insulated conductors comprise first signal output lead and the first earth lead,
Wherein every the first insulated conductor is through in described the first tubular shielding shell, so that the head end of each root the first insulated conductor is suitable for passing from the same side of described the first opening, and the tail end of each root the first insulated conductor is suitable for passing from the opposite side of described the first opening, the first insulated conductor that is different from described first signal output lead and the first earth lead in described many first insulated conductors in series is electrically connected in the mode of end connector end, and the head end that is not electrically connected with tail end of the first insulated conductor that in series is electrically connected is electrically connected to the tail end of described first signal output lead, the tail end that is not electrically connected with head end of described the first insulated conductor that in series is electrically connected is electrically connected to the head end of described the first earth lead, the head end of described first signal output lead is used for the first signal of the first field intensity component of the described position to be measured of output indication, the tail end ground connection of described the first earth lead
Described the second assembly comprises:
The the second tubular shielding shell that is the shape of the ring with second opening; With
Many the second insulated conductors that respectively have head end and tail end, described many second insulated conductors comprise secondary signal output lead and the second earth lead,
Wherein every the second insulated conductor is through in described the second tubular shielding shell, so that the head end of each root the second insulated conductor is suitable for passing from the same side of described the second opening, and the tail end of each root the second insulated conductor is suitable for passing from the opposite side of described the second opening, the second insulated conductor that is different from described secondary signal output lead and the second earth lead in described many second insulated conductors in series is electrically connected in the mode of end connector end, and the head end that is not electrically connected with tail end of the second insulated conductor that in series is electrically connected is electrically connected to the tail end of described secondary signal output lead, the tail end that is not electrically connected with head end of described the second insulated conductor that in series is electrically connected is electrically connected to the head end of described the second earth lead, the head end of described secondary signal output lead is used for the secondary signal of the second field intensity component of the described position to be measured of output indication, the tail end ground connection of described the second earth lead
Wherein said the first tubular shielding shell is identical with described the second tubular shielding shell, and be arranged to into 90 the degree and so that, the second opening of the first opening of described the first tubular shielding shell and described the second tubular shielding shell intersects, and the part relative with described the first opening of described the first tubular shielding shell intersects with the part relative with described the second opening of described the second tubular shielding shell, and the quantity of wherein said many first insulated conductors is identical with the quantity of described many second insulated conductors, and
Field strength receiver, described field strength receiver are used for receiving described the first and second signals, and calculate the vector of described the first and second field intensity components and as the electromagnetic field intensity value of described position to be measured based on described the first and second field intensity components.
2. system according to claim 1, the quantity of wherein said many first insulated conductors is more than 7 or 7, the quantity of described many second insulated conductors is more than 7 or 7.
3. system according to claim 1, the phase contact of any two wires all passes through a resistance-grounded system in wherein said the first insulated conductor that in series is electrically connected, and the phase contact of any two wires all passes through a resistance-grounded system in described the second insulated conductor that in series is electrically connected.
4. system according to claim 3, the resistance of wherein said resistor is 250-350 ohm.
5. system according to claim 4, the resistance of wherein said resistor is 300 ohm.
6. system according to claim 1, wherein said the first tubular shielding shell is the shape of the annulus with first opening.
7. system according to claim 1, wherein said the second tubular shielding shell is the shape of the annulus with second opening.
8. system according to claim 1, also comprise base, described base is used for the part of described second opening of restriction of the part of described the first opening of restriction of fixing described the first tubular shielding shell and described the second tubular shielding shell, is limited by described base describedly.
9. system according to claim 8, wherein said the first opening is limited by the two ends of described the first tubular shielding shell, described the second opening is limited by the two ends of described the second tubular shielding shell, and described base is used for the two ends of fixing described the first tubular shielding shell and the two ends of described the second tubular shielding shell.
10. system according to claim 8, wherein said the first tubular shielding shell has the first additional opening in the part relative with described the first opening, and comprise two identical, the first tubular shielding half shell that is the shape of semi-ring, wherein said the first opening and the first additional opening are limited by two pairs of opposite ends of described two the first tubular shielding half shells respectively, described the second tubular shielding shell has the second additional opening in the part relative with described the second opening, and comprise two identical, the second tubular shielding half shell that is the shape of semi-ring, wherein said the second opening and the second additional opening are limited by two pairs of opposite ends of described two the second tubular shielding half shells respectively, described base be used for fixing described two the first tubular shielding half shells described the first opening of restriction the opposite end to the opposite end of described second opening of restriction of described two the second tubular shielding half shells pair.
11. system according to claim 10, also comprise an insulation top box, described top box be used for fixing described two the first tubular shielding half shells restriction the described first additional opening the opposite end to the opposite end of the restriction described second additional opening of described two the second tubular shielding half shells pair.
12. system according to claim 10, wherein said the first tubular shielding half shell is the shape of semicircular ring.
13. system according to claim 10, wherein said the second tubular shielding half shell is the shape of semicircular ring.
14. each described system according to claim 8-13, wherein said base is metab.
15. each described system according to claim 1-13, wherein said shell is metal.
16. each described system according to claim 8-13, also be provided with signal and select and treatment circuit in described base, described field strength receiver is selected to be electrically connected to the head end of described first signal output lead and the head end of described secondary signal output lead with treatment circuit by described signal.
17. system according to claim 16, wherein said signal is selected to comprise a relay with treatment circuit, described relay is used for the head end of the head end of described first signal output lead and described secondary signal output lead is electrically connected to described signal selection and treatment circuit in turn, and the head end of the head end of described first signal output lead and described secondary signal output lead is electrically connected to described field strength receiver in turn thus.
18. be used for the method according to each described system of aforementioned claim, comprise step:
(i) described system is placed described position to be measured carry out that electromagnetic field intensity is measured so that described the first tubular shielding shell and described the second tubular shielding shell perpendicular to surface level, with the secondary signal of the second field intensity component of the first signal of the first field intensity component of obtaining indicating described position to be measured and the described position to be measured of indication;
(ii) determine described the first field intensity component and the second field intensity component based on described first signal and secondary signal respectively; And
(iii) calculate the vector of described the first and second field intensity components based on described the first and second field intensity components and as the electromagnetic field intensity value of described position to be measured.
19. method according to claim 18, wherein said step (iii) comprises:
With in described the first field intensity component and the second field intensity component larger one as the bigness scale value, perhaps in the situation that described the first field intensity component and the second field intensity component equate arbitrary as the bigness scale value in them;
Determine to be used as the angle between the electromagnetic field intensity of the described field intensity component of bigness scale value and described position to be measured based on described the first field intensity component and the second field intensity component, and determine a modified value based on described angle; And
Obtain the electromagnetic field intensity value of described position to be measured with the described bigness scale value of described modified value correction.
20. method according to claim 19, wherein said the first field intensity component and the second field intensity component are take dB μ V/m as unit, and described step (iii) comprises:
With in described the first field intensity component and the second field intensity component larger one as the bigness scale value, perhaps in the situation that described the first field intensity component and the second field intensity component equate arbitrary as the bigness scale value in them;
Difference based on described the first field intensity component and the second field intensity component is determined a modified value, wherein said modified value multiply by the value that (20) obtain for the common logarithm of the cosine of the angle between the electromagnetic field intensity of the field intensity component that will be used as the bigness scale value and described position to be measured, and described angle is definite based on described difference; And
With described bigness scale value and described modified value and as the electromagnetic field intensity value of described position to be measured.
21. method according to claim 20, the corresponding relation between wherein said difference and the described modified value is set up in advance, determines that the step of modified value comprises based on the definite and described poor corresponding modified value of described corresponding relation.
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| CN105870631B (en) * | 2016-05-24 | 2019-08-13 | 北京森馥科技股份有限公司 | Double loop antenna |
| CN107390040A (en) * | 2017-09-06 | 2017-11-24 | 天津飞眼无人机科技有限公司 | A kind of unmanned plane measurement apparatus and wireless network for being used to measure electric-field intensity |
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| US6556023B2 (en) * | 2000-06-01 | 2003-04-29 | Sony Corporation | Apparatus and method for measuring electromagnetic radiation |
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