JPH063392A - Electromagnetic environment measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To enable three-dimensional measurement of the electromagnetic environment at an arbitrary spatial position around a radiated emission source such as a wireless transmission antenna. [Structure] An electromagnetic environment measurement antenna 12 is mounted on a levitation body 13, and a movable second levitation body 1 separated from the levitation body 13.
By controlling 3a, the periphery of the radiation interference wave source is arbitrarily moved in the air. Then, the electromagnetic environment measurement signal of the measurement antenna 12 is transmitted by the optical fiber cable 17, and at the same time as on the ground (20).
Is configured to wirelessly transmit a control signal for the levitation body 13a. Further, the spatial position is three-dimensionally detected by the measurement block unit 16a using the position measurement cable 18 attached to the levitation body 13 on the ground side, and the measured data signal is correspondingly matched and displayed on the ground side as an image. This makes it possible to measure and display the electromagnetic environment in a space without roads in association with the three-dimensional position, and since an optical fiber that does not affect the electromagnetic environment is used, stable and highly accurate measurement / control is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile measuring system for three-dimensionally measuring an electromagnetic environment around a radiated emission source by using a moving body equipped with a measuring antenna, and more particularly to a cable positioning type wireless control electromagnetic environment measuring apparatus. It is about.

[0002]

2. Description of the Related Art FIG. 11 is a block diagram of a conventional measurement system using an automobile as a moving body. Reference numeral 1 is an electromagnetic environment measuring antenna mounted on the roof of the automobile, and 2 is an electric field intensity meter or a spectrum analyzer. The measuring unit 3, a geomagnetic sensor for detecting the azimuth at the position of the moving vehicle, 4 a distance pulse sending unit for generating a pulse for measuring the traveling distance in response to the rotation of the wheels of the moving vehicle, 5 a geomagnetic sensor 3, A position signal detection unit that detects the position / direction information of the moving vehicle from the distance pulse transmission unit 4, and 6 is a measurement / position signal matching unit that matches the measurement data of the measurement unit 2 with the position data from the position signal detection unit 5. , 7 are drawing units for drawing the data matched by the measurement / position signal matching unit 6 and displaying the images.

[0003] FIG. 10 is a diagram illustrating a method of traveling on a road around a radiated emission source using the measurement system of FIG. 11 and based on measurement data of electric field (or magnetic field) intensity on an arbitrary road, a constant equal electric field (or 8 is a plan explanatory view of a method of estimating the distribution of (isomagnetic field) lines, where 8 is a wireless transmission antenna used for radio, TV, FM broadcasting, communication, etc., 9 is a wireless transmission antenna 8
Is a road in the vicinity of which mobile vehicles can pass, 10 occupies one side area of the wireless transmission antenna 8, an area with the road 9 such as a residential / commercial area, 11 is the other area of the wireless transmission antenna 8, It is an area without roads consisting of fields, forests, and pastures. When installing information communication equipment in these areas, it is necessary to know the range of influence of the radiated interference wave from the wireless transmission antenna 8, and the electromagnetic environment measurement using the measurement system of FIG. 11 is performed as follows. It is being appreciated.

That is, the traveling vehicle of FIG. 11 travels on the road 9 of FIG. 10, and the distance r _A from the radio transmitting antenna 8 is
r _B, respectively A located r _C, B, the electric field intensity E _A of the point C, E _B, measures the E _C. If a point on the road where the distance to the wireless transmission antenna 8 is known from a map or the like is set as a reference point in advance, these A to
The position of the point C is obtained from the traveling distance based on the number of pulses output from the geomagnetic sensor 3 and the distance pulse transmitter 4 mounted on the moving vehicle, and r _A to r _C are also clarified.

On the other hand, since it is known that the electric field strength E around the wireless transmission antenna 8 is inversely proportional to the distance r from the antenna, the wireless transmission antenna 8 and each of A, B, and
On the radial directions 8-a, 8-b, 8-c connecting to the point C, the radio transmission antenna 8 having the same electric field strength E ₁
The distances r _A1 , r _B1 , r _C1 from the measured electric field strength E
_{By A} , E _B , E _C and r _A , r _B , r _C , E ₁ = E _A · r _A
/ R _A1 = E _B · r _B / r _B1 = E _C · r _C / r _C1

On the other hand, the electric field strength E in the roadless area 11
If the transmission output w (vector amount) of the road (radius) r _D1 to be 1 is clear from the radio wave propagation formula in the free space of radio waves, for example, E1≈K · w which is well known in the case of a medium wave broadcasting antenna. ^{From 1/2} / r _D1 (where K is a proportional constant), it is determined as a constant value in the area 11. From these, the isoelectric field lines where the electric field strength is E ₁ around the radiated emission source 8 are shown in FIG.
A solid line E ₁ is obtained as a curve, and an isoelectric field line having an electric field strength E ₂ different from E ₁ is also obtained as a dotted line E ₂ .

[0007]

However, these equipotential lines obtained by the conventional measuring system shown in FIG.
Areas with roads around the radiated emission sources are based on estimated values based on actual measurement data on the roads, and because the reflection status of radio waves differs depending on the height and density of buildings near the measurement points, it is large. There is a drawback that an error occurs.
In addition, since it is not possible to measure the area without roads around the radiated emission source, it is based on the estimated value using the mere free space propagation formula of the radio wave. There is a big difference from the value.
In addition, since the measurement uses the antenna mounted on the mobile vehicle, there is a limit to the measurement in the height direction, and it is possible to obtain a three-dimensional precise isoelectric field line including the height around the radiated emission source. There are difficult drawbacks.

In view of the above points, the present invention has been made to solve the above problems, and an object thereof is to three-dimensionally determine the electromagnetic environment at an arbitrary spatial position around a radiation interference wave source such as a radio transmission antenna. The purpose of the present invention is to provide a cable positioning type wirelessly controlled electromagnetic environment measuring device capable of performing physical measurement.

[0009]

In order to achieve the above-mentioned object, the present invention provides a first aerial levitation body with a measuring section, which mounts an electromagnetic environment measuring antenna and a levitation means of a levitation body, and the first aerial levitation body. A second aerial levitation body with a drive unit, which is provided separately from the levitation body to drive and control the levitation body;
The 3D spatial position of the levitation body is detected by the angle detection mechanism and the extension length detection mechanism of the position measurement cable attached to the levitation body, and the second levitation body is moved by the control signal from the ground. A ground moving body having a function of making the electromagnetic wave interference signal detected by the antenna for electromagnetic environment measurement transmitted to the ground moving body using a cable; and a levitation propulsion of the second floating body from the ground. A wireless transmission means for wirelessly transmitting the control signal is provided, and the three-dimensional position detection signal and the electromagnetic environment signal transmitted in the ground moving body are matched to measure and display the electromagnetic environment in an arbitrary space. It is a thing.

[0010]

In the present invention, the electromagnetic environment measuring antenna is mounted on the first levitation body that can be moved in the air, and the movable second levitation body that is separated from the first levitation body is controlled. ,
The arbitrary spatial position is detected from the ground by the angle and the length of extension of the position measuring cable attached to the first float. Then, the electromagnetic environment measurement data signal is transmitted using a wired cable connecting the first levitation body and the measurement unit in the ground moving body, and the aerial control data signal of the levitation body is wirelessly transmitted to the control unit in the ground moving body. By transmitting using
The electromagnetic environment can be measured three-dimensionally.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram showing the outline of the measuring system of the present invention. In the figure, 12 is an electromagnetic environment measuring antenna, 13 is a levitation body equipped with this antenna 12, which is a first levitation body capable of moving in the air as a measurement device, and 13a is separated from this levitation body 13. A levitation body equipped with a drive control unit as a second levitation body that drives the levitation body, 14 is levitation propulsion means of the first levitation body 13, and 14 ₁ and 14 ₂ are second levitation bodies 13
a, a levitation propulsion means including levitation and aerial movement vanes, 15 an aerial movement block part for control and the like mounted on the first levitation body 13, 15a aerial part, such as a control part mounted on the second levitation body 13a It is a moving block unit.

Further, 16 is a ground block section consisting of a measurement / control device mounted in the ground vehicle 20, and 16a is a three-dimensional position measuring block for measuring the spatial position of the levitation body 13 mounted in this vehicle 20. And 17 are an aerial movement block section 15 and a ground block section 16 in the first levitation body 13.
It is an optical fiber cable for electromagnetic environment measurement signals that connects with. Reference numeral 18 is a lightweight cable for measuring the position of the first floating body 13 in the measurement block portion 16a, 19 is a cable feeding portion of the optical fiber cable 17 mounted on the moving vehicle 20, and 21 is a second floating body 13a. 1 is a tow rope that pulls the levitation body 13, and the aerial control signal of the second levitation body 13a is transmitted to the control unit installed in the ground moving vehicle 20 by radio as described later. ing.

FIG. 2 is a block diagram of the aerial movement block unit 15 of FIG.
15a is an embodiment of the present invention showing specific configurations of the three-dimensional position measurement block unit 16a and the ground block unit 16a. Here, 17 ₁ is a core wire of the optical fiber cable 17, 22 is a wireless transmission antenna for transmitting a levitation body drive control signal from the ground block section 16 side, and 23 is a levitation body transmitted from this transmission antenna 22. The wireless reception antenna receives a drive control signal. Reference numeral 24 denotes an optical-electrical (O / E) converter in the air movement block unit 15 to which the optical fiber cable for electromagnetic environment measurement signal 17 ₁ is connected, 25
Is a receiving circuit section for receiving the levitating body drive control signal from the receiving antenna 23, and 26 is a selection / distribution circuit section for selecting and distributing the levitating body control signal received by the receiving circuit section 25, 27 ₁ , 27 ₂ The levitation body 13 is driven by driving the levitation propulsion means 14 ₁ and 14 ₂ with the output of the selection / distribution circuit section 26.
It is a drive circuit unit for levitating and moving a.

Next, 28 is a radio modulation circuit section for sending the levitating body drive control signal in the ground movement block section 16 to its transmitting antenna 22, and 29 is a ground modulation section section in the ground block section 16 connected to the optical fiber cable 17 ₁ . An electrical-optical (E / O) converter, 30 is a measurement signal receiving / measuring unit for receiving and measuring an electromagnetic environment signal sent from the measurement antenna 12 of the first levitation body 13 via its cable 17 ₁ , and 31 is A sweep activation unit that operates the reception measurement unit 30 according to a three-dimensional position signal,
Reference numeral 32 is a measurement / measurement for matching the spatial position and the measurement data by matching the output of the reception measurement unit 30 and the three-dimensional position signal.
The position signal matching unit 33 is a drawing unit that draws an image of the output of the measurement / position signal matching unit 32 and displays the image.

Reference numeral 34 is a three-dimensional position signal receiving portion for receiving the signal from the three-dimensional position measuring block portion 16a and transmitting the output to the sweep starting portion 31 and the measurement / position signal matching portion 32, and 35 is the three-dimensional position signal receiving portion. This is a levitation body control signal transmission unit that transmits a signal for controlling the levitation propulsion means 14 ₁ and 14 ₂ by an output from the dimensional position signal reception unit 34 or independently of this, and this control signal is transmitted wirelessly. Modulation circuit 2
8. The signal is transmitted to the midair moving block portion 15a in the levitation body 13a via the transmitting antenna 22.

Further, 36 is the position measuring cable 1
8 is a levitation body tracking device that detects the spatial position of the levitation body 13, 37 is an elevation angle signal detection unit that detects the elevation angle of the three-dimensional position measurement cable 18, and 38 is a three-dimensional position measurement cable 18. A horizontal rotation angle signal detector for detecting the horizontal rotation angle, 39 is a cable for measuring three-dimensional position 18
The cable payout length detecting unit as a distance detecting means for detecting the payout length, and a three-dimensional position calculating unit 40 for obtaining a three-dimensional position from the angle signals and the payout length signal.

FIG. 3 shows the aerial movement block units 15 and 15a.
And measuring antenna 12 and levitation propulsion means 14 ₁ , 14 ₂
It is a structural example of a part of the floating body 13 and 13a in the air, and is a levitation propulsion means 14 ₁ and 14 ₂ including two sets of rotary vanes.
Among them, the blades of each set rotate in the same direction, and the blades of different sets rotate in opposite directions to obtain a stable buoyancy by the offsetting action of the torque. Further, the horizontal movement changes due to the change in the rotational speed of the same set, and the levitation body 13a rotates due to the change of the rotational speed of the different set.

Further, the electromagnetic environment measuring antenna 12 has a structure such as a wide band three-axis orthogonal dipole antenna that can respond to the incoming radio waves from various directions without rotating, and the levitation propulsion means 14 ₁ , such as a motor, In order to reduce the influence of the radiation interference wave from the drive source of 14 ₂ , it is suspended from the levitation body 13 with a necessary distance d.

FIG. 4 shows another embodiment of the portion of the floating body 13 in FIG. 3, and 41 is a balloon in which helium gas or the like is sealed. In-air movement block unit 15 including measurement antenna 12
The buoyancy is reduced only by the levitation propulsion means 14 ₃ and 14 _{4 with} respect to the weight of helium gas by adjusting the pressure and capacity of the helium gas sealed in the balloon 41. The levitation propulsion means 14 ₃ ,
To control the speed and direction of 14 ₄ of the blade, it is to be moved through the air in any direction by applying pulses of different pulse widths or periods for such drive source (such as a motor).

With reference to FIGS. 1 to 4 shown above, an example of the method according to the present invention for obtaining the three-dimensional distribution of the isoelectric field lines around the radiated emission source as shown in FIG. 10 will be described below. In FIG. 1, the floating bodies 13 and 13a are mounted on a moving vehicle 20, and
Stop at any position on road 0. Next, the control signal from the levitation body control signal transmission unit 35 of FIG.
8. The signal is sent to the midair moving block unit 15a in the second levitation body 13a via the transmitting antenna 22, and this control signal is received by the receiving circuit unit 25. As a result, the signal is supplied to the drive circuit units 27 ₁ and 27 ₂ via the selection / distribution circuit unit 26 to drive each of the levitation propulsion means 14 ₁ and 14 ₂ to levitate the second levitation body 13a in the air. , And controls the first levitation body 13 and moves in arbitrary horizontal and vertical spaces within a range determined by the cable length with the stop position of the moving vehicle 20 as the center.

The levitation body tracking device 36 is activated during the movement of the levitation body, and the three-dimensional position information receiving section 34 detects the three-dimensional position information obtained from the three-dimensional position measurement block section 16a. The sweep activation unit 31 is operated by this detection output signal to capture the electromagnetic environment measurement signal detected by the measurement antenna 12 coming from the levitation body 13 via the optical fiber cable 17 ₁ into the reception measurement unit 30, The detection output signal from the three-dimensional position signal receiving unit 34 is input to the measurement / position signal matching unit 32, where the electromagnetic environment measurement signal and the spatial position signal are processed in a corresponding manner, and a storage unit (not shown) is provided. Store the data in. If necessary at this stage, the processed data such as the isoelectric field lines are displayed on the screen by the drawing unit 33. As the drive energy of the selective distribution circuit unit 26 and the drive circuit units 27 ₁ and 27 _{2 in} the levitation body, a battery mounted in the levitation body (not shown) is used.

After the above operation is completed, the levitation body 13, 13a
After the vehicle is collected in the moving vehicle 20, the same electric field lines as shown by E1 and E2 in FIG. 10 in an arbitrary space without a road can be easily obtained by moving to another road position and repeating the same operation. These isoelectric field lines are not estimated curves based on road data according to the conventional technique as shown in FIG.
All of them are based on the actual measurement data at each position, so that they represent accurate actual environmental conditions regardless of topography, building height, density, etc.

In the above embodiment, the case where the sweep starter 31 is operated by the detection output signal from the three-dimensional position signal receiver 34 and the incoming interfering wave signal to the reception measurement unit 30 is fetched by this output has been described. However, the reception measurement unit 30
In the case where the incoming signal from the measurement antenna 12 is stored in the memory for each self-sweep, and the output is sent to the measurement / position signal matching unit 32 when the three-dimensional position detection signal is input. Good.

Further, the levitation body control signal transmission section 35 does not depend on the detection signal of the three-dimensional position signal reception section 34 for driving the levitation body.
However, it goes without saying that the spatial position of the levitation body may be controlled by transmitting a control signal from the levitation body control signal transmission section 35 in response to the detection signal.

FIG. 5 shows that when the length l of the optical fiber cable 17 is increased, the weight of the optical fiber cable 17 causes the cable to hang down to prevent it from contacting obstacles in the vicinity and restricting the movement of the levitation body 13 in the air. This is an embodiment in which means is added, and an auxiliary balloon 42 for lifting the cable is provided for each predetermined optical fiber cable length l _i , l _j . At this time, if a helium gas having a volume and atmospheric pressure that cancels the cable weights of the predetermined cable lengths l _i and l _{j is} previously enclosed in the auxiliary balloon 42, the distance from the stopped moving vehicle 20 to the levitation body 13 can be increased. Even if there is an obstacle, such as a building or a tree in the middle, the hanging portion of the cable 17 can be lifted, so that the obstacle can be avoided and the electromagnetic environment of a wider space can be measured.

FIG. 6 shows an embodiment in which the auxiliary balloon 42 of FIG. 5 is further provided with a propulsion means, and 43 is an auxiliary balloon propulsion means similar to the levitation propulsion means 14 ₁ and 14 ₂ of the levitation body 13a, and 44
Is an aerial movement block section for an auxiliary balloon that receives a control signal transmitted from the transmission antenna 22 of the ground block section 16 and drives and controls the propulsion means 43, similarly to the aerial movement block section 15a of the levitation body 13a. By providing such a propulsion means 43 on the auxiliary balloon 42, the auxiliary balloon 42 as well as the levitation bodies 13 and 13a can be controlled in the air by the control from the ground block portion 16, so that the contact of the cable with the obstacle can be further avoided. Therefore, there is an advantage that it is possible to easily measure the electromagnetic environment at an arbitrary spatial position even in an area where buildings having different heights are densely packed.

FIG. 7 shows an embodiment of the optical fiber cable feeding portion 19 of the measuring system according to the present invention, 51 is a feeding guide axially movable outside the cable drum 50, 52 is a motor for rotating the cable drum 50, 53
Is a rotating disk that freely rotates the cable drum 50 in a horizontal plane by the tension of the optical fiber cable 17, and 54 is a motor that controls the rotation of the rotating disk 53. Levitator 1
It is necessary to control the motor 54 so that the cable drum 50 is always in the direction perpendicular to the cable tension applied when the cable is fed out in the propulsion drive control of No. 3, and to control the rotation of the rotating disk 53, and to give the cable a predetermined reaction force. The motor 52 controls the cable so that it does not sag.

When the floating bodies 13 and 13a are collected in the moving vehicle 20 after the measurement is completed, the feeding guide 51 is moved in the axial direction of the cable drum 50 so that the optical fiber cable 17 can be wound evenly. There is. By using the cable feeding portion 19 as described above, the cable feeding and winding can be easily performed during the levitation propulsion control of the levitation body 13.

FIG. 8 shows an embodiment in the case where the measurement by the electromagnetic environment measuring antenna in the measuring system of the present invention is carried out by using an optical power feeding type antenna, 12a is an optical power feeding type antenna, 45 is a light source such as a semiconductor laser, 46 is a light source 45 based on an electric signal detected by the optical power feeding type antenna 12a.
It is an optical modulator that changes the amplitude of light from. Since such an optical power feeding type antenna 12a is lightweight and has a wide band characteristic, there is an advantage that the weight for mounting the levitation body can be lightened, and the band of the electromagnetic environment measurement can be widened without exchanging the antenna. In the figure, the same reference numerals indicate the same or corresponding parts, and 17 ₂ indicates the core wire of the optical fiber cable 17 connecting the light source 45 and the O / E converter 24 a in the levitation body 13.

FIG. 9 shows an embodiment of the three-dimensional position measuring block portion 16a in the measuring system of the present invention. 61 is a feeding guide axially movable outside the cable drum 60, and 62 is a motor for rotating the cable drum 60. , 63
Is a rotating disk that freely rotates the cable drum 60 in a horizontal plane by the tension of the position measuring cable 18, and 64 is a motor that controls the rotation of the rotating disk 63. Levitator 1
In the propulsion drive control of No. 3, the motor 62 is controlled so that the cable drum 60 is always in the direction perpendicular to the cable tension applied when the cable is fed out, and the rotation disk 63 is rotationally controlled. The motor 62 controls so that the cable does not slacken.

Further, 65 is a horizontal rotation angle measuring mechanism for detecting the horizontal rotation angle of the rotary disk 63, 66 is an elevation angle measuring mechanism for measuring the elevation angle of the measurement cable 18, and 67 is a rotary encoder for detecting the cable extension length. ,
Assuming that the position measuring cable 18 is lightweight and slack, the payout length is the distance between the moving vehicle 20 and the levitation body 13. Further, the cable distance may be detected by marking the cable with a scale. A three-dimensional position is detected from these horizontal angle, elevation angle and distance. Further, when the floating body 13 is collected in the moving vehicle 20 after the measurement is completed, the feeding guide 61 is moved in the axial direction of the cable drum 60 so that the cable 18 can be wound evenly. By using such a cable feeding portion, the three-dimensional position of the levitation body 13 can be easily measured.

The present invention is not limited to the above-mentioned embodiment, and an optical fiber cable for transmission may be a fine coaxial cable. By this,
Since it is not necessary to mount the E / O converter on the levitation body, the levitation body can be reduced in weight.

[0033]

As described above, according to the electromagnetic environment measuring apparatus of the present invention, a floating body equipped with an electromagnetic environment measuring antenna is used to freely move around a radiated emission source in the air, and an electromagnetic environment measurement signal is wired. While transmitting using
Since the aerial position of the levitation body is three-dimensionally detected from the levitation body tracking device on the ground part, and the measured data signal is correspondingly displayed on the ground part, the electromagnetic environment of a space without roads is displayed. The measurement can be displayed in association with the three-dimensional position. Moreover, because transmission signals are exchanged using cables such as optical fibers that do not affect the electromagnetic environment,
There is an advantage that stable and highly accurate measurement and control can be performed.

Since the levitation body control signal from the ground is wireless, the weight of the cable is reduced and the flight characteristics of the levitation body are improved. Furthermore, by separating the levitation body and the drive control unit and the measurement unit, the weight of each levitation body can be reduced, and the levitation body can be downsized.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an outline of a measurement system of the present invention.

FIG. 2 is a specific configuration diagram of an aerial movement block unit and a ground block unit according to the present embodiment.

FIG. 3 is a schematic diagram of an aerial levitation body according to the present embodiment.

FIG. 4 is a schematic diagram of a modified example of the floating body in FIG.

FIG. 5 is a schematic diagram illustrating an embodiment of a cable lifting means using an auxiliary levitation body according to the present invention.

FIG. 6 is a schematic view for explaining an embodiment of an auxiliary levitation body having a propulsion means according to the present invention.

FIG. 7 is a configuration diagram of an optical fiber cable feeding portion of the present embodiment.

FIG. 8 is a configuration diagram showing an embodiment of a measurement system using an optical power feeding type antenna according to the present invention.

FIG. 9 is a configuration diagram of a three-dimensional position measurement block unit using the lightweight cable of the present embodiment.

FIG. 10 is an explanatory diagram of a method for estimating the distribution of equal electric field lines around the radiated interference wave according to the present invention.

FIG. 11 is a configuration diagram of a conventional measurement system.

[Explanation of symbols]

12 Antenna for electromagnetic environment measurement 13 Levitating body (first levitating body) mounted with measuring device 13a Levitating body (second levitating body) mounted with drive control unit 14, 14 ₁ , 14 ₂ Levitating propulsion means 16 Ground block 16a 3D Position measurement block 17 Optical fiber cable 18 Light weight cable for three-dimensional position measurement 19 Cable feeding part 20 Ground vehicle 21 Tow rope 22 Floating body drive control signal wireless transmission antenna 23 Floating body drive control signal wireless reception antenna 24 Optical- Electric (O / E) converter 25 Floating body drive control signal receiving circuit section 26 Floating body control signal selection / distribution circuit section 27 ₁ , 27 ₂ Driving circuit section 28 Floating body drive control signal wireless modulation circuit section 29 Electric -Optical (E / O) converter 30 Measurement signal reception measurement unit 31 Sweep drive unit 32 Measurement / position signal matching unit 33 Drawing unit 34 3D Position signal receiver 35 Floating body control signal transmitter 36 Floating body tracking device 37 Elevation angle signal detector 38 Horizontal rotation angle angle signal detector 39 Cable extension length detector (distance detector) 40 Three-dimensional position calculator

Claims (1)

[Claims] 1. A first aerial levitation body with a measuring unit, which mounts an electromagnetic environment measuring antenna and a levitation means of a levitation body, and a levitation body separately provided for driving and controlling the first aerial levitation body. 3D spatial position detection of the levitation body by the second levitation body with the drive unit and the angle detection mechanism of the position measurement cable attached to the first levitation body from the ground, and the payout length detection mechanism. And a ground moving body having a function of moving the second floating body in response to a control signal from the ground, and an electromagnetic interference wave signal detected by the electromagnetic environment measuring antenna using a cable. And a wireless transmission means for wirelessly transmitting a levitation propulsion control signal from the ground of the second levitating body, which is transmitted with the three-dimensional position detection signal in the ground moving body. An electromagnetic environment measuring device characterized in that the electromagnetic environment signals are matched to measure and display an electromagnetic environment in an arbitrary space.