JP6611897B2 - Measuring apparatus, measuring system and measuring method - Google Patents

Description

  Embodiments described herein relate generally to a measurement apparatus, a measurement system, and a measurement method.

  2. Description of the Related Art Conventionally, a measuring apparatus (see, for example, Patent Document 1) that stores an attitude of a measurement antenna and a received intensity in association with each other when measuring the intensity of a radio wave transmitted from a radio base station is known.

JP 2012-199727 A

  In the measuring apparatus as described above, the antenna is moved to the position to be measured, and the intensity of the radio wave is manually measured.

  It is an object of the present invention to provide a measuring apparatus, a measuring system, and a measuring method that can reduce the labor of measuring the intensity of radio waves.

  One embodiment of the present invention moves an own device from an arrival / departure position to the measurement position based on measurement position information indicating a predetermined measurement position as a destination for measuring the strength of radio waves, and the own device measures the measurement A movement control unit that moves within a predetermined range near the measurement position, a radio wave intensity measurement unit that measures the intensity of a radio wave transmitted from a wireless communication station at the measurement position, and Radio wave intensity information in which an imaging unit that captures a landscape of the arrival direction of the radio wave as a captured image, the radio wave intensity measured by the radio wave intensity measurement unit, and the captured image captured by the imaging unit; And a storage control unit for storing in the storage unit.

  In the measurement apparatus according to an embodiment of the present invention, the storage control unit associates the radio wave intensity, the captured image, and base station identification information for identifying a radio communication station that transmits the received radio wave. And stored in the storage unit as the radio wave intensity information.

  In the measurement apparatus according to the embodiment of the present invention, the storage control unit may store the radio field intensity information in the storage unit when the radio field intensity measured by the radio field intensity measurement unit exceeds a predetermined threshold. Remember.

  In the measurement apparatus according to the embodiment of the present invention, the storage control unit may store the radio field intensity information about the radio wave having the maximum intensity among the radio field intensity measured by the radio field intensity measurement unit at the measurement position. Remember.

  In the measurement apparatus according to an embodiment of the present invention, the captured image captured by the imaging unit includes an image of an antenna included in the wireless communication station.

  The measurement apparatus according to an embodiment of the present invention further includes a determination unit that determines whether the captured image captured by the imaging unit includes an image of an antenna of the wireless communication station.

  In the measurement apparatus according to an embodiment of the present invention, the determination unit compares the image of the antenna of the wireless communication station that has been imaged in advance with the captured image that is captured by the imaging unit. It is determined whether or not the captured image captured by the unit includes an image of an antenna included in the wireless communication station.

  One embodiment of the present invention includes the measurement device described above, the measurement device according to any one of claims 1 to 7, and the radio wave intensity information stored in the storage unit of the measurement device. And an analysis device including an intensity distribution calculation unit that calculates an intensity distribution of the radio wave at the measurement position based on information indicating the position of the measurement device.

  One embodiment of the present invention is a measurement method using a measurement device mounted on a flying object, and is based on measurement position information indicating a measurement position that is predetermined as a destination for measuring the strength of radio waves. A movement control step of moving from a departure / arrival position to the measurement position and moving within a predetermined range near the measurement position when the own aircraft reaches the measurement position, and transmitted from the radio communication station at the measurement position A radio wave intensity measuring step for measuring radio wave intensity; an imaging step for capturing a landscape in the direction of arrival of the radio wave measured in the radio wave intensity measuring step as a captured image; and the radio wave intensity measuring step Storage control for storing, in a storage unit, radio field intensity information in which radio field intensity is associated with the captured image captured in the imaging step. And steps, a measuring method having.

  ADVANTAGE OF THE INVENTION According to this invention, the measuring apparatus, measuring system, and measuring method which can reduce the effort of measuring the intensity | strength of an electromagnetic wave can be provided.

It is a schematic diagram which shows an example of the measuring object of the measuring apparatus of this embodiment. It is a figure which shows an example of the external appearance structure of the flying body of this embodiment. It is a block diagram which shows an example of a function structure of the measuring apparatus of this embodiment. It is a flowchart which shows an example of operation | movement of the control part of this embodiment. It is a schematic diagram which shows an example of the measuring object range by the measuring apparatus of this embodiment. It is a table | surface which shows an example of the measurement result information of this embodiment. It is a schematic diagram which shows an example of arrangement | positioning of the antenna of the repeater station in this embodiment. It is a flowchart which shows the modification of operation | movement of the measuring apparatus of this embodiment.

[Embodiment]
Hereinafter, the measuring apparatus 2 according to the present embodiment will be described with reference to the drawings. First, the measurement object of the measurement apparatus 2 will be described with reference to FIG.

[Measurement target of measuring device 2]
FIG. 1 is a schematic diagram illustrating an example of a measurement target of the measurement apparatus 2 of the present embodiment. The measuring device 2 measures the intensity of the radio wave transmitted by the radio base station BS. The radio base station BS includes, for example, an antenna that transmits and receives radio waves, and provides a mobile phone service by communicating with a mobile terminal in the service area AR. In the following description, the radio base station BS is also simply referred to as a base station BS. A plurality of base stations BS may be installed in a certain area. For example, a base station BS1, a base station BS2, and a base station BS3 are installed in the area shown in FIG. Among these, the base station BS1 communicates with mobile terminals in the service area AR1.

  By the way, if an obstacle such as a mountain or a large building exists in the service area AR1, there may be an area AR2 where radio waves from the base station BS1 do not reach. In this case, if the repeater station RS is installed at a position where the radio wave of the base station BS1 can be received, the radio wave can be transmitted to a range including the area AR2. In the case of FIG. 1, the repeater station RS transmits the radio wave received from the base station BS1 to the mobile terminal in the service area AR3. Further, the repeater station RS transmits the radio wave received from the mobile terminal in the service area AR3 to the base station BS1. By installing the repeater station RS in this way, the range of the area AR2 where radio waves do not reach can be reduced, so that the quality of the wireless communication service can be improved.

  The measuring device 2 measures the intensity of the radio wave transmitted by the base station BS at the planned installation position of the repeater station RS. The measurement result by the measurement device 2 is the base station BS to which the repeater station RS should communicate with the installation position of the repeater station RS, the position of the transmission / reception antenna included in the repeater station RS, and the repeater station RS. It is used when judging.

  In addition, in this embodiment, although the case where the measuring apparatus 2 is used when installing the repeater station RS is described as an example, it is not limited thereto. The measuring device 2 is used for installing various antennas that receive radio waves from the base station BS and for installing other base stations BS that receive radio waves from the base station BS. For example, the measuring device 2 is used to measure the radio field intensity at a candidate site when installing another base station BS for one base station BS when connecting the base stations BS with a wireless backhaul line. May be. Hereinafter, the configuration of the measuring apparatus 2 will be described with reference to FIGS. 2 and 3.

[Configuration of Aircraft 1]
FIG. 2 is a diagram illustrating an example of an external configuration of the flying object 1 of the present embodiment. The measuring device 2 is mounted on the flying object 1 shown in FIG. 2 as an example. The flying object 1 includes a measuring device 2, a GPS receiving unit 30, a camera 40, a radio wave receiving unit 50, and a motor 60.

  The GPS receiver 30 receives radio waves transmitted by a GPS (Global Positioning System) satellite. The radio wave transmitted by the GPS satellite includes a signal for specifying the position where the radio wave is received, that is, the position of the flying object 1. The GPS receiving unit 30 converts radio waves received from GPS satellites into GPS signals SG, and outputs the converted GPS signals SG to the measuring device 2. In this example, the GPS receiving unit 30 will be described with respect to the case of receiving a radio wave transmitted by a GPS satellite, but is not limited thereto. For example, the GPS receiver 30 may receive radio waves from artificial satellites other than GPS satellites, such as a quasi-zenith satellite with high positioning accuracy.

  The imaging unit, that is, the camera 40 images a landscape around the flying object 1. The camera 40 outputs the captured landscape image to the measuring apparatus 2 as a peripheral image PIC. In this example, the imaging direction of the camera 40 matches the nose direction HDG of the flying object 1. In this case, the camera 40 images a landscape in front of the flying object 1.

  The radio wave receiver 50 includes an antenna (not shown) and receives radio waves transmitted from the base station BS. The radio wave transmitted by the base station BS includes a base station ID that is information for identifying the base station BS. For example, the radio wave transmitted by the base station BS1 includes “BS001” as the base station ID. The radio waves transmitted by the base stations BS2 and BS3 include “BS002” and “BS003” as base station IDs, respectively. The radio wave receiving unit 50 converts the received radio wave into a reception signal SR, and outputs the converted reception signal SR to the measurement device 2. The received signal SR includes a base station ID that is information for identifying the base station BS.

The motor 60 gives lift and propulsion to the flying object 1 by rotating the rotor RT. In this example, the flying object 1 includes motors 61 to 64. The motors 61 to 64 rotate the corresponding rotors RT1 to RT4. By controlling the drive current supplied to each motor 60, the flight altitude, direction, and traveling direction of the aircraft 1 can be controlled.
The measuring device 2 includes a control unit 10 and a storage unit 20. A functional configuration of the measuring apparatus 2 will be described with reference to FIG.

[Configuration of Measuring Device 2]
FIG. 3 is a block diagram illustrating an example of a functional configuration of the measuring apparatus 2 according to the present embodiment. The measuring device 2 is connected to the GPS receiver 30, the camera 40, the radio wave receiver 50, and the motor 60 described above.
The storage unit 20 includes a nonvolatile semiconductor memory, and stores measurement position information 201 and measurement result information 202. This semiconductor memory may be a portable IC memory that can be removed from the flying object 1, or a flash ROM that cannot be removed from the flying object 1. The measurement position information 201 is information indicating the destination TGT of the flying object 1. The destination TGT is a measurement position where the measurement device 2 measures the intensity of radio waves. The measurement position information 201 is stored in advance in the storage unit 20 before the flying object 1 starts to fly. The measurement result information 202 is information indicating a measurement result by the measurement device 2.

In this example, the case where the measurement apparatus 2 includes the storage unit 20 and the measurement result information 202 is stored in the storage unit 20 will be described, but the present invention is not limited thereto. The measuring device 2 may transmit the measurement result information 202 to another device by wireless communication without storing the measurement result information 202 in the storage unit 20 or while storing the measurement result information 202 in the storage unit 20. .
The measuring device 2 can also measure the reception state of radio waves according to the time zone during which the flying object 1 flies. For example, the reception state of radio waves may deteriorate in a specific time zone due to the influence of noise or the like generated in a specific time zone. In such a case, the measurement device 2 measures the reception state of the radio wave while the flying object 1 flies periodically, so that the time zone in which the reception state of the radio wave deteriorates can be grasped.

The control unit 10 includes a movement control unit 101, an own device position calculation unit 102, a radio wave intensity measurement unit 103, and a storage control unit 104 as functional units. Hereinafter, the configuration and operation of each functional unit will be described with reference to FIGS. 3 and 4.
FIG. 4 is a flowchart showing an example of the operation of the control unit 10 of the present embodiment.

[Configuration and operation of each functional unit of the control unit 10]
The own aircraft position calculation unit 102 calculates the position of the flying object 1, that is, the own aircraft position. Specifically, own position calculation unit 102 acquires GPS signal SG output from GPS receiving unit 30 (step S10 in FIG. 4). Next, the own device position calculation unit 102 calculates the own device position information IP by performing a known calculation based on the GPS signal SG acquired in step S10 (step S20 in FIG. 4). This own aircraft position information IP includes the latitude, longitude, and altitude of the aircraft 1 that is its own aircraft. The own device position calculation unit 102 outputs the calculated own device position information IP to the movement control unit 101 and the storage control unit 104.

Note that the own device position calculation unit 102 may calculate the own device position information IP based on the peripheral image PIC output by the camera 40 in addition to or instead of the GPS signal SG. In this case, the own device position calculation unit 102 calculates the own device position information IP by comparing the information of the landscape image stored in advance with the peripheral image PIC captured by the camera 40. As a result, the own device position calculation unit 102 can calculate the own device position even in a situation where radio waves from GPS satellites cannot be received.
In addition, the own aircraft position calculation unit 102 may calculate the altitude of the flying object 1 by using a barometer or an altimeter (not shown).

The movement control unit 101 controls the movement of the flying object 1. Specifically, the movement control unit 101 compares the coordinates of the destination TGT of the flying object 1 indicated by the measurement position information 201 with the own position information IP calculated by the own position calculation unit 102, thereby The flight route to the ground TGT is calculated. The coordinates of the destination TGT are stored in advance as measurement position information 201 in the storage unit 20 before the flying object 1 flies.
Further, the movement control unit 101 controls the drive current DC of the motor 60 by a known calculation so that the flying object 1 flies along the calculated flight route. The motor 60 rotates based on the control of the movement control unit 101. Thereby, the flying body 1 flies along the flight route toward the destination TGT. That is, the movement control unit 101 moves the own device to the measurement position based on the measurement position information 201 indicating the measurement position of the radio wave intensity.
Further, the movement control unit 101 determines whether or not the flying object 1 has arrived at the destination TGT (step S30 in FIG. 4). If it is determined that the flying object 1 has not arrived at the destination TGT (step S30; NO), the movement control unit 101 returns the process to step S10 in FIG. If the movement control unit 101 determines that the flying object 1 has arrived at the destination TGT (step S30; YES), the process proceeds to step S40 in FIG.

  The radio wave intensity measuring unit 103 measures the intensity of the radio wave received by the radio wave receiving unit 50 based on the amplitude of the reception signal SR output from the radio wave receiving unit 50 (step S40 in FIG. 4). The radio wave intensity measuring unit 103 outputs radio wave intensity information IR indicating the measured radio wave intensity to the storage control unit 104. The radio wave intensity information IR includes a base station ID, a value indicating the radio wave intensity, and a value indicating a signal-to-noise power ratio (S / N ratio). That is, the radio wave intensity measuring unit 103 measures the intensity of the radio wave transmitted from the base station BS (wireless communication station) at the measurement position.

The own device position calculation unit 102 includes an orientation determination unit 1021 as its function unit. The direction determination unit 1021 determines the reception direction of the antenna provided in the radio wave reception unit 50 (step S50 in FIG. 4). Specifically, the own aircraft position calculation unit 102 calculates the nose direction HDG of the flying object 1 based on the GPS signal SG output from the GPS reception unit 30. This heading HDG is an example of a flight direction. In the azimuth determination unit 1021, a correspondence relationship between the reception azimuth of the antenna included in the radio wave reception unit 50 and the nose azimuth HDG of the aircraft 1 is stored in advance. For example, when the antenna included in the radio wave receiver 50 has directivity characteristics with high reception sensitivity in the front direction of the flying object 1, that is, when the antenna is attached to the front direction of the flying object 1, the antenna And the nose direction HDG of the air vehicle 1 coincide with each other. In this case, the direction determination unit 1021 determines the nose direction HDG as the direction of the antenna. The direction determination unit 1021 associates the calculated radio field intensity information IR measured by the radio field intensity measurement unit 103 with the calculated angle θ of the nose direction HDG and outputs the information to the storage control unit 104. The storage control unit 104 causes the storage unit 20 to store the radio wave intensity information IR associated with the angle θ as the measurement result information 202. That is, the storage control unit 104 stores the azimuth information indicating the azimuth determined by the azimuth determination unit 1021, the radio wave intensity information IR, and the position information in association with each other in the storage unit.
The own position calculation unit 102 may determine the reception direction of the radio wave to be measured by the radio wave intensity measurement unit 103 with respect to the own apparatus instead of or in addition to the direction of the antenna. The own aircraft position calculation unit 102 may simply determine the orientation of the flying object 1, for example, the nose direction HDG.
Further, in this example, the own device position calculation unit 102 determines the azimuth based on the GPS signal SG, but is not limited thereto. The own position calculation unit 102 may determine the direction based on information from an inertial navigation device including a gyro, an orientation sensor, a magnetic compass, and the like.

When the reception direction of the antenna included in the radio wave reception unit 50 and the nose direction HDG of the aircraft 1 do not match, the direction determination unit 1021 determines that the reception direction of the antenna and the own aircraft position calculation unit 102 are The reception direction of radio waves is calculated based on the difference from the calculated heading HDG.
In addition, the radio wave receiver 50 may include a plurality of antennas having different reception directions. For example, the radio wave receiving unit 50 may include three antennas having a receiving azimuth of 0 °, a receiving azimuth of 120 °, and a receiving azimuth of 240 ° when the nose direction HDG of the flying object 1 is set to 0 °. In this case, the direction determination unit 1021 may determine the reception direction of radio waves based on the strengths of the radio waves received by these three antennas. That is, the direction determination unit 1021 can determine the direction in which the strength of the radio wave received by the radio wave reception unit 50 is strongest. In this case, the storage control unit 104 causes the storage unit 20 to store the azimuth having the strongest radio wave intensity determined by the azimuth determination unit 1021 in association with the radio wave intensity information IR as the radio wave reception direction.
The storage control unit 104 may store the radio wave reception azimuth in the storage unit 20 in association with the radio wave intensity information IR in the order of the radio wave intensity determined by the direction determination unit 1021. Specifically, the storage control unit 104 has the first reception direction with the strongest radio wave intensity, the second reception direction with the second highest radio wave intensity, and the third highest radio wave intensity. May be stored in the storage unit 20 in association with the radio field intensity information IR.

  The storage control unit 104 generates measurement result information 202 based on the measurement position information 201, the own device position information IP, and the radio wave intensity information IR, and stores the generated measurement result information 202 in the storage unit 20 (FIG. 4 step S70). Specifically, the storage control unit 104 compares the aircraft position information IP output from the aircraft position calculation unit 102 with the measured position information 201 stored in the storage unit 20, and the aircraft 1 It is determined whether or not the ground TGT, that is, the measurement position has been reached. If the storage control unit 104 determines that the flying object 1 has reached the destination TGT, the storage control unit 104 generates the measurement result information 202 by associating the aircraft position information IP with the radio wave intensity information IR, and generates the measurement The result information 202 is stored in the storage unit 20. That is, the storage control unit 104 causes the storage unit 20 to store the radio field intensity information indicating the radio field intensity measured by the radio field intensity measurement unit 103 in association with the own apparatus position information indicating the position of the own apparatus.

  The control unit 10 determines whether or not to measure at another position (step S80 in FIG. 4). If it is determined to measure at another position (step S80; YES), the process from step S40 to step S70 is performed. repeat. Moreover, when it determines with the control part 10 not measuring in another position (step S80; NO), a series of processes are complete | finished.

  Next, with reference to FIGS. 5 to 7, a more specific example of the measurement of the radio wave intensity by the flying object 1 will be described.

[Move to measurement position (destination TGT)]
FIG. 5 is a schematic diagram illustrating an example of the measurement target range MOA by the measurement apparatus 2 of the present embodiment. The measuring device 2 measures the intensity of the radio wave from the base station BS at the installation candidate position of the repeater station RS. The installation candidate position of the repeater station is determined as the destination TGT of the flying object 1. This destination TGT is stored in advance as measurement position information 201 in the storage unit 20 of the measurement apparatus 2. In this example, the destination TGT is determined at a position away from the base station BS by a predetermined distance dst.
The flying object 1 is loaded on a vehicle or the like and transported to a departure / arrival position PD near the destination TGT. The flying object 1 flies on the flight route FR from the arrival / departure position PD toward the destination TGT based on the position information indicated by the radio wave received from the GPS satellite.
Note that the flying object 1 may be transported to the destination TGT. In this case, the flying object 1 starts flying at the destination TGT and measures the radio field intensity.

[Specific examples of measurement range]
When the flying object 1 arrives at the destination TGT, the measurement device 2 starts measuring the intensity of the radio wave. Here, the flying object 1 measures the intensity of radio waves in a measurement target range MOA that is a predetermined range around the destination TGT. For example, the flying object 1 measures the intensity of radio waves at each measurement point within the measurement target range MOA. In this example, the measurement target range MOA is defined as a cylindrical region having a radius r and a height h with the position of the destination TGT as the center axis CL. As an example, measurement points P010 and P011 are defined as measurement points of the measurement target range MOA.
The flying object 1 moves within the measurement target range MOA, measures the radio wave intensity at each measurement point, and associates the result ID, base station ID, radio wave intensity, position information, captured image, etc. The information 202 is stored in the storage unit 20. A specific example of the measurement result information 202 will be described with reference to FIG.

[Specific examples of measurement results]
FIG. 6 is a table showing an example of the measurement result information 202 of the present embodiment. The measurement result information 202 includes a result ID, a base station ID, radio wave intensity, position information, and a captured image.
The result ID is an identifier of the measurement result. The storage control unit 104 of the measuring device 2 gives a result ID to the measurement result every time the intensity of the radio wave is measured at the measurement point. For example, the storage control unit 104 assigns “P010” as the result ID to the measurement result at the measurement point P010.

  The base station ID in the measurement result information 202 is an identifier included in a radio wave transmitted by the base station BS as information for identifying the base station BS. That is, the base station ID indicates which base station BS is the base station BS that has transmitted the radio wave measured by the measuring device 2. For example, the base station BS1 transmits “BS001” as the base station ID. Also, the base station BS2 and the base station BS3 transmit “BS002” and “BS003” as base station IDs, respectively.

  The radio wave intensity in the measurement result information 202 is information indicating the intensity of the radio wave received at the measurement point. In this example, the intensity of the radio wave received at the measurement point P010 is −89 [dBm]. The intensity of the radio wave received at the measurement point P011 is −85 [dBm]. That is, in this example, the radio wave received at the measurement point P011 is stronger than the radio wave received at the measurement point P010.

The position information in the measurement result information 202 is information indicating the position of the measurement point. The position of the measurement point is indicated by latitude, longitude, and altitude. In this example, the measurement point P010 is indicated by north latitude N, east longitude E, and altitude H.
Further, the arrival direction of the radio wave can be calculated by a known means based on the reception direction of the radio wave by the radio wave reception unit 50 at the measurement point, the orientation of the antenna of the radio wave reception unit 50, or the nose direction HDG of the flying object 1. There are cases where it is possible. In this case, the arrival direction of the wave is calculated based on the information indicating the azimuth included in the measurement result information 202. For example, the arrival direction of the radio wave at the measurement point is indicated by an angle θ with reference to the north direction DN. For example, when radio waves are coming from the base station BS1, the direction of arrival of radio waves at the measurement point is indicated by the angle θ1.
In this example, the arrival direction of radio waves is indicated by an angle in the horizontal direction, but may be indicated by an angle in the vertical direction. That is, the position information in the measurement result information 202 may be information indicating the horizontal angle and the vertical angle of the antenna of the radio wave receiver 50 at the measurement point.

Note that the measuring device 2 may receive radio waves transmitted by a plurality of base stations BS at a certain measurement point. In this case, the measuring apparatus 2 may leave the measurement result only for the radio wave indicating the maximum intensity at a certain measurement point, or may leave the measurement result individually for each received radio wave.
For example, in the measurement result information 202 shown in FIG. 6, the result ID “P010” indicates that the radio wave from the base station BS1 was strongest at the measurement point P010 shown in FIG. That is, the measurement result of the result ID “P010” is a measurement result of only the radio wave indicating the maximum intensity among the radio waves received from the plurality of base stations BS at the measurement point P010.
Further, in the measurement result information 202 shown in FIG. 6, the result IDs “P020”, “P021”, and “P022” indicate that radio waves are received from the three base stations BS at the measurement point P02 shown in FIG. Show. That is, the measurement results of the result IDs “P020”, “P021”, and “P022” are measurement results individually measured for radio waves received from the respective base stations BS at the measurement point P02.

The captured image in the measurement result information 202 is an image captured by the camera 40 at the measurement point. That is, this captured image is an image of a landscape around the measurement point.
In addition, when the imaging direction of the camera 40 and the azimuth | direction of the antenna of the electromagnetic wave receiver 50 correspond, this captured image shows the scenery of the arrival direction of an electromagnetic wave. In this case, according to this captured image, it can be used for checking whether there is an obstacle such as a tree or a building in the arrival direction of the radio wave.
Even if the imaging direction of the camera 40 and the orientation of the antenna of the radio wave receiving unit 50 do not match, the measurement device 2 associates the captured image with the imaging direction of the camera 40 and obtains a measurement result. By storing the information as information 202, it is possible to determine which direction around the flying object 1 is the captured image. Further, when the measurement device 2 stores the measurement result at a certain measurement point as the measurement result information 202, the measurement device 2 may capture an image with the imaging direction of the camera 40 directed toward the arrival direction of the radio wave at the measurement point. Even with this configuration, the measuring apparatus 2 can store a captured image indicating the scenery in the direction of arrival of radio waves as the measurement result information 202.

[End of measurement]
When the measurement of the radio wave intensity is completed at each measurement point in the measurement target range MOA at the destination TGT, the measurement device 2 ends the measurement at the destination TGT. When the measurement is completed, the movement control unit 101 of the measuring device 2 moves the flying object 1 from the destination TGT shown in FIG. With this configuration, according to the measuring apparatus 2, the flying object 1 is moved from the landing position PD to the destination TGT to measure the radio wave intensity, and when the measurement is completed, the flying object 1 is returned to the original landing position PD. Can be returned to. That is, according to the measuring apparatus 2, the measurement of the radio wave intensity by the flying object 1 can be automated.

  Each part of the flying object 1 is driven by a battery (not shown). When the remaining amount of the battery falls below a predetermined determination threshold, the measuring device 2 ends the measurement at the destination TGT regardless of whether the measurement of the radio wave intensity is ended. You can also. Moreover, the determination threshold value of the battery remaining amount may be determined based on the number of measurement points in the measurement target range MOA, the flight distance, the flight time, and the like. Further, the measuring device 2 may calculate a determination threshold for the remaining battery level based on the number of measurement points, the flight distance, the flight time, etc. within the measurement target range MOA. In this case, the measuring apparatus 2 compares the determination threshold value calculated based on the number of measurement points, the flight distance, the flight time, and the like within the measurement target range MOA with the remaining battery level, thereby determining the destination TGT. The measurement at is terminated. By configuring in this way, the measuring device 2 can land the flying object 1 before the remaining battery level becomes insufficient during the measurement, that is, during the flight of the flying object 1. Thereby, the measuring apparatus 2 can suppress the damage by the fall of the flying body 1, the loss | disappearance of measurement data, etc. which arise by the battery remaining shortage.

Note that the measurement result information 202 stored in the storage unit 20 of the measurement device 2 can be read out to an analysis device (not shown) after the flying object 1 returns to the landing position PD. In this case, the storage unit 20 may be a portable medium such as a memory card.
This analyzing apparatus calculates the intensity distribution of the radio wave at the destination TGT, that is, at the measurement position, by a known means based on the own position information, the direction information, and the radio wave intensity information included in the measurement result information 202. More specifically, the analysis device reads measurement result information 202 at a plurality of positions from the storage unit 20 of the measurement device 2. Further, the analysis device calculates the radio wave intensity distribution based on the own position information, the azimuth information, and the radio wave intensity information of each of the plurality of positions included in the read measurement result information 202.
Further, during the flight of the flying object 1, the measurement device 2 may transmit the measurement result information 202 to the analysis device. In this case, the measuring device 2 may include an infrared communication unit (not shown), for example. The measuring device 2 transmits the measurement result information 202 to the analyzing device by the infrared communication unit. Thereby, the measuring apparatus 2 can output the measurement result information 202 to the analysis apparatus even before the flying object 1 returns to the landing position PD. Further, in this case, the measuring apparatus 2 can reduce the influence on the measurement of the intensity of the radio wave compared to the case where the measurement result information 202 is output to the analysis apparatus by the radio wave. Note that the type of communication in which the measurement device 2 transmits the measurement result information 202 to the outside of the aircraft 1 is not limited to infrared communication. For example, the measurement device 2 may transmit the measurement result information 202 to the analysis device by communication using visible light or communication using radio waves. Further, the measurement device 2 may transmit the measurement result information 202 to the analysis device by wired communication.

[Specific example of antenna installation position]
FIG. 7 is a schematic diagram showing an example of the antenna arrangement of the repeater station RS in the present embodiment. Based on the measurement result information 202 by the measuring device 2, the antenna arrangement when the repeater station RS is installed at the destination TGT can be examined. For example, the antenna ANT1 that transmits and receives radio waves to and from the base station BS is arranged in the azimuth and height with the highest radio wave intensity within the measurement target range MOA at the destination TGT. In this example, the antenna ANT1 is arranged at an angle θ1 and a height h1 at the destination TGT position. The antenna ANT2 that transmits and receives radio waves to and from the mobile terminal in the service area AR3 is disposed at a position where interference with the antenna ANT1 is sufficiently small. In this example, the antenna ANT2 is disposed at an angle θ2 and a height h2 at the destination TGT position. In this case, the angle between the antenna ANT1 and the antenna ANT2 is the difference between the angle θ2 and the angle θ1, that is, the angle θ3.
Note that interference between antennas includes sneak interference. Here, wraparound interference is interference between a transmitting antenna and a receiving antenna in the same base station BS. Specifically, sneak interference is interference generated when a radio wave transmitted from a transmitting antenna installed in a base station BS is received by a receiving antenna installed in the base station BS. It is. The antenna ANT1 and the antenna ANT2 are disposed at a position where the sneak interference is sufficiently small.

  As described above, according to the measuring apparatus 2 of the present embodiment, the measurement of the radio wave intensity by the flying object 1 can be automated, so that the labor of measuring the radio wave intensity can be reduced.

[Modification]
With reference to FIG. 8, the modification of the measuring apparatus 2 of this embodiment is demonstrated.
FIG. 8 is a flowchart showing a modification of the operation of the measuring apparatus 2 of the present embodiment. In FIG. 8, the same operations as those shown in FIG. 4 are denoted by the same reference numerals, and the description thereof is omitted. In this modification, the measurement device 2 differs from the operation shown in FIG. 4 in that it determines whether or not to store the measurement result information 202 based on the threshold value of the radio wave intensity.

  In this modified example, the measuring device 2 does not move the flying object 1 to a predetermined measurement point, but searches for a position where the strength of the radio wave is strong while moving the flying object 1. Specifically, the movement control unit 101 moves the flying object 1 to a predetermined range near the measurement position, that is, to an arbitrary position within the measurement target range MOA when the own aircraft reaches the destination TGT. The radio wave intensity measuring unit 103 measures the intensity of radio waves that change with the movement of the own device.

  In step S60, the storage control unit 104 determines whether or not the measured radio wave intensity exceeds a predetermined threshold value. If the storage control unit 104 determines that the intensity of the measured radio wave exceeds a predetermined threshold (step S60; YES), the storage control unit 104 stores the measurement result as the measurement result information 202 in the storage unit 20 (step S70). ). On the other hand, if the storage control unit 104 determines that the measured radio wave intensity does not exceed the predetermined threshold (step S60; NO), the storage control unit 104 does not store the measurement result.

In step S90, the storage control unit 104 determines whether or not the intensity of the radio wave measured at various positions within the measurement target range MOA exceeds a predetermined threshold value used for the determination in step S60. . If the storage control unit 104 determines that the predetermined threshold value is not exceeded at any measurement point (step S90; NO), the storage control unit 104 changes the threshold value (step S100). In this example, the storage control unit 104 reduces the threshold value.
That is, the storage control unit 104 determines that the strength of the radio wave measured by the radio field strength measurement unit 103 is not measured when the strength of the radio wave measured by the radio field strength measurement unit 103 within a predetermined range does not exceed the threshold. The measurement result is stored as measurement result information 202 when the intensity exceeds a second threshold value lower than the threshold value.

  According to the measurement apparatus 2 of this modification, it is possible to automatically search for a position where the intensity of the radio wave is relatively strong without setting the measurement point in advance. That is, according to the measurement device 2 of this modification, it is possible to further reduce the labor of measuring the intensity of radio waves.

Further, it is desirable that there is no obstacle such as a mountain, a tree, or a building between a certain base station BS and another base station BS or repeater station RS that receives radio waves from the base station BS. When the frequency of the radio wave is relatively high, it is particularly susceptible to these obstacles. Therefore, when the flying object 1 flies at the planned installation position of another base station BS or repeater station RS that receives radio waves from a certain existing base station BS, the antenna of this existing base station BS is visible. Is desirable.
The measuring apparatus 2 stores, as measurement result information 202, a captured image obtained by capturing the direction of the existing base station BS with the camera 40 at the planned installation position of the base station BS or the repeater station RS. By comparing the captured image captured in this way with the image of the antenna of the existing base station BS that has been captured in advance, it is determined whether or not the existing base station BS can be seen from the planned grounding position. can do.
In addition, when there are a plurality of candidate positions at the installation positions of the base station BS or the repeater station RS, the measuring apparatus 2 can also capture the direction of the existing base station BS with the camera 40 at each installation candidate position. . If comprised in this way, the position where the prospect of the existing base station BS is good can be selected from several installation candidate positions.
In addition, it is also possible to select a base station BS having a good view from the planned installation position from a plurality of existing base stations BS by capturing images of antennas of a plurality of existing base stations BS in advance. .
Note that the measuring apparatus 2 can also store an image of the antenna of the existing base station BS in advance. In this case, the measuring apparatus 2 can determine whether or not the existing base station BS can be seen.

  As mentioned above, although embodiment of this invention and its deformation | transformation were demonstrated, these embodiment and its deformation | transformation were shown as an example and are not intending limiting the range of invention. These embodiments and modifications thereof can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and at the same time, are included in the invention described in the claims and equivalents thereof.

  Each of the above devices has a computer inside. The process of each device described above is stored in a computer-readable recording medium in the form of a program, and the above-described processing is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

The program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

1 ... Aircraft, 2 ... Measurement device

Claims (9)

Based on measurement position information indicating a measurement position predetermined as a destination for measuring the strength of the radio wave, when the own machine is moved from the arrival / departure position to the measurement position, and the own machine reaches the measurement position, A movement controller that moves within a predetermined range near the measurement position;
A radio wave intensity measuring unit for measuring the intensity of radio waves transmitted from a wireless communication station at the measurement position;
An imaging unit that captures, as a captured image, a landscape in the direction of arrival of the radio wave with respect to the device;
A storage control unit that stores, in a storage unit, radio field intensity information in which the radio field intensity measured by the radio field intensity measurement unit is associated with the captured image captured by the imaging unit;
A measuring device mounted on a flying object. The storage control unit associates the radio wave intensity, the captured image, and base station identification information for identifying a wireless communication station that transmits the received radio wave, and stores the radio wave intensity information in the storage unit. The measuring apparatus according to claim 1. The storage control unit
The measurement apparatus according to claim 1, wherein the radio field intensity information is stored in the storage unit when the radio field intensity measured by the radio field intensity measurement unit exceeds a predetermined threshold value. The storage control unit
The measurement apparatus according to any one of claims 1 to 3, wherein the radio field intensity information on the radio wave having the maximum intensity among the radio wave intensities measured by the radio field intensity measurement unit at the measurement position is stored. . The measurement apparatus according to claim 1, wherein the captured image captured by the imaging unit includes an image of an antenna included in the wireless communication station. The measurement according to any one of claims 1 to 5, further comprising a determination unit that determines whether or not the captured image captured by the imaging unit includes an image of an antenna of the wireless communication station. apparatus. The determination unit
The image of the antenna of the wireless communication station is added to the captured image captured by the imaging unit by comparing the image of the antenna of the wireless communication station captured in advance with the captured image captured by the imaging unit. The measuring apparatus according to claim 6, wherein a determination is made as to whether or not. A measuring device according to any one of claims 1 to 7,
Analysis comprising an intensity distribution calculation unit for calculating the distribution of the intensity of the radio wave at the measurement position based on the radio wave intensity information stored in the storage unit of the measurement apparatus and information indicating the position of the measurement apparatus Equipment,
Measuring system. A measurement method using a measurement device mounted on a flying object,
Based on measurement position information indicating a measurement position predetermined as a destination for measuring the strength of the radio wave, when the own machine is moved from the arrival / departure position to the measurement position, and the own machine reaches the measurement position, A movement control step for moving within a predetermined range near the measurement position;
A radio wave intensity measuring step for measuring the intensity of the radio wave transmitted from the radio communication station at the measurement position;
An imaging step of capturing, as a captured image, a landscape in the direction of arrival of the radio wave measured in the radio field intensity measuring step;
A storage control step of storing, in a storage unit, radio field intensity information in which the radio field intensity measured in the radio field intensity measurement step is associated with the captured image captured in the imaging step;
Measuring method.

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