JP2018155710A - Radio wave measurement device, unmanned aircraft, and radio wave measurement device management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio wave measurement device that can efficiently grasp a radio wave situation.SOLUTION: A radio wave measurement device 21 comprises: a first reception unit 25 that receives a radio wave of a prescribed frequency band; a radio wave intensity data acquisition unit 26 that scans the radio wave of the prescribed frequency band received by the first reception unit 25 at a time interval of 1 m second to 100 seconds to acquire radio wave intensity data serving as data on intensity of the radio wave for each prescribed frequency band; a position data acquisition unit 27 that acquires position data indicative of a position of the radio wave measurement device 21 at a time when the radio wave intensity data is acquired by the radio wave data intensity acquisition unit 26; a time data acquisition unit 28 that acquires time data indicative of a time at a time when the radio wave intensity data is acquired by the radio wave data intensity acquisition unit 26; and a first storage control unit 29 that controls so as to store the radio wave intensity data acquired by the radio wave intensity data acquisition unit 26, the position data acquired by the position data acquisition unit 27, and the time data acquired by the time data acquisition unit 28 in a first storage unit 24 in association with these data.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a radio wave measuring apparatus, an unmanned aerial vehicle, and a radio wave measuring apparatus management system.

  2. Description of the Related Art Conventionally, a radio wave measuring apparatus that measures radio waves is known (see, for example, Patent Document 1).

JP2013-83455A

  There is a case where it is desired to grasp the radio wave condition at each position in a certain site such as grasping the risk of communication failure. When grasping the radio wave condition at each position in a wide site, a measurer who measures the radio wave intensity may carry the radio wave measurement device and measure the radio wave intensity at each position in the site. However, this method is inefficient because it takes a lot of time and labor when the site area is large. In particular, when the range in which the radio wave condition is desired is, for example, several square kilometers (kilometers), it is required to improve the radio wave condition investigation efficiency. Further, it is preferable that the radio field intensity can be measured as accurately as possible, that is, with high accuracy at each position.

  An object of the present invention is to provide a radio wave measuring apparatus capable of efficiently grasping radio wave conditions.

  Another object of the present invention is to provide an unmanned aerial vehicle capable of efficiently grasping radio wave conditions.

  Still another object of the present invention is to provide a management system for a radio wave measuring device that can appropriately manage radio wave condition measurement information.

  In one aspect of the present invention, the radio wave measuring apparatus measures radio waves in a predetermined space. The radio wave measuring apparatus includes a first storage unit that stores data, a first receiving unit that receives radio waves in a predetermined frequency band, and radio waves in a predetermined frequency band that are received by the first receiving unit by 1 m. The radio wave intensity data is acquired by the radio wave intensity data acquiring unit that acquires radio wave intensity data that is radio wave intensity data for each predetermined frequency by scanning at a time interval of (milli) seconds to 100 seconds, and the radio wave intensity data acquiring unit. A position data acquisition unit for acquiring position data indicating the position of the radio wave measuring device at the time, a time data acquisition unit for acquiring time data indicating the time when the radio wave intensity data acquisition unit acquires the radio wave intensity data, and the radio wave intensity The first storage unit that links the radio wave intensity data acquired by the data acquisition unit, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit And a first storage control unit for controlling to store.

  By configuring in this way, radio wave intensity data is acquired by scanning at a very short time interval such as an interval of 1 msec to 100 seconds, and position data and time data when the radio wave intensity data is acquired are also acquired. Therefore, for example, even when radio wave intensity data is acquired by moving the radio wave measuring device at high speed in a wide site, the radio wave intensity data at each position and each time can be acquired with high accuracy. Then, based on the radio wave intensity data, position data, and time data stored in the first storage unit and associated with each other, it is possible to accurately know the radio wave situation at each position and each time in a predetermined space. . Therefore, the radio wave measuring apparatus having such a configuration can efficiently grasp the radio wave situation.

  The radio wave measuring apparatus may further include a radio communication unit that outputs the radio wave intensity data, the position data, and the data stored in the first storage unit to the outside by radio communication. By doing so, the stored radio wave intensity data, position data, and time data can be output to the outside by wireless communication in real time. Therefore, the radio wave intensity data at the position requested by the measurer can be measured more appropriately.

  The radio wave measuring device further includes a azimuth data acquiring unit that acquires azimuth data indicating the moving direction of the radio wave measuring device, and the first storage control unit receives the azimuth data acquired by the azimuth data acquiring unit as a radio wave. You may make it control linked with intensity | strength data and memorize | storing in a 1st memory | storage part. By doing so, it is possible to grasp the position of the radio wave measuring apparatus that moves continuously more accurately together with the azimuth data.

  The position data acquisition unit may include a second receiving unit that receives a GNSS radio wave transmitted from a global positioning satellite system (GNSS (Global Navigation Satellite System)). By doing so, it is possible to acquire the position data of the radio wave measuring apparatus more accurately using the second receiving unit.

  The position data may include height data of the radio wave measuring device. By doing so, radio wave intensity data corresponding to the height direction in a predetermined space can be acquired, and radio wave intensity data desired by the measurer can be acquired. In particular, when an unmanned aerial vehicle flying in the air at high speed is equipped with a radio wave measurement device to measure radio waves, radio wave intensity data in the height direction can be acquired over a wider range, and it is more accurately specified in three dimensions. It is possible to grasp the radio wave condition in the space.

  The radio wave measuring apparatus may include a housing that covers the first storage unit, and the first receiving unit may be provided outside the housing with a string-like connection unit interposed therebetween. . By so doing, radio waves can be received more appropriately. In particular, when a radio measurement device is mounted on an unmanned aerial vehicle flying at high speed in the air to measure radio waves, the first receiver is located on the lower side or rear side of the radio measurement device, and mainly on the upper side. Interference with radio waves when acquiring position data to be received can be suppressed.

  The radio wave measuring apparatus may further include an attitude data acquiring unit that acquires attitude data indicating the attitude of the radio wave measuring apparatus when the radio wave intensity data acquiring unit acquires the radio wave intensity data. By doing so, it is possible to appropriately acquire the azimuth data of the radio wave source of the radio wave to be measured. In addition, when a radio wave measurement device is mounted on an unmanned aerial vehicle flying in the air at high speed to acquire radio waves, it can be reflected in the control of the attitude of the unmanned aircraft. Furthermore, the acquired attitude data of the radio wave measuring device can be used for checking the installation state of the radio wave measuring apparatus to the unmanned aircraft by comparing the attitude data of the unmanned aircraft itself.

  The predetermined frequency band is in the range of 2.4 GHz to 2.5 GHz, and the predetermined frequency is preferably 1 MHz. With this configuration, it is possible to efficiently acquire radio wave intensity data particularly in the frequency band requested by the measurer. In particular, when a radio wave measuring device is mounted on an unmanned aerial vehicle moving at a high speed of several tens of kilometers per hour, radio wave intensity data desired by the measurer can be continuously acquired.

  In another aspect of the present invention, the unmanned aerial vehicle is capable of flying in a predetermined space by maneuvering by wireless communication, and is mounted on the flight main body portion and transmits radio waves in a predetermined space where the flight main body portion is located. And a radio wave measuring device to measure. The radio wave measuring apparatus includes a first storage unit that stores data, a first receiving unit that receives radio waves in a predetermined frequency band, and radio waves in a predetermined frequency band that are received by the first receiving unit. The radio wave intensity data acquisition unit that acquires radio wave intensity data that is radio wave intensity data for each predetermined frequency by scanning at the time interval of, and the position of the radio wave measurement device when the radio wave intensity data acquisition unit acquires the radio wave intensity data A position data acquisition unit that acquires position data indicating a time, a time data acquisition unit that acquires time data indicating the time when the radio wave intensity data acquisition unit acquires the radio wave intensity data, and a radio wave acquired by the radio wave intensity data acquisition unit Control is performed so that the intensity data, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit are linked and stored in the first storage unit. And a first storage control unit.

  According to the unmanned aircraft having such a configuration, it is possible to efficiently acquire a wide range of radio wave intensity data together with position data and time data in the radio wave measuring device by using a flight main body that flies at high speed in a predetermined space. it can. Therefore, the radio wave condition can be grasped efficiently.

  The radio wave intensity data acquisition unit may acquire radio wave intensity data for each predetermined frequency by scanning at a time interval of 1 msec to 100 seconds. By doing so, it is possible to continuously grasp changes in radio field intensity accompanying movement by an unmanned aircraft more appropriately.

  The position data acquisition unit includes a second reception unit that receives a GNSS radio wave transmitted from a GNSS (global positioning satellite system), and the radio wave measurement device is configured such that the second reception unit faces upward. You may make it mount in a flight main-body part. By doing so, it is possible to suppress interference between the GNSS radio wave and the radio wave received by the first receiving unit and measured by the radio wave measuring device in a predetermined space.

  In still another aspect of the present invention, a radio wave measuring device management system is capable of measuring radio waves in a predetermined space, and capable of wireless communication with the radio wave measuring device, and the radio waves measured by the radio wave measuring device. And a management device for managing the data. The radio wave measuring apparatus includes a first storage unit that stores data, a first receiving unit that receives radio waves in a predetermined frequency band, and radio waves in a predetermined frequency band that are received by the first receiving unit by 1 m. A radio wave intensity data acquisition unit that acquires radio wave intensity data that is radio wave intensity data for each predetermined frequency by scanning at time intervals of seconds to 100 seconds, and radio waves when the radio wave intensity data acquisition unit acquires the radio wave intensity data. A position data acquisition unit that acquires position data indicating the position of the measurement device, a time data acquisition unit that acquires time data indicating the time when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit, and a radio wave intensity data acquisition unit Is stored in the first storage unit by associating the radio wave intensity data acquired by the position data, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit. A first storage control unit that controls the transmission, and a transmission control unit that controls the radio field intensity data, the position data, and the time data stored in the first storage unit to be transmitted to the management apparatus at a predetermined timing by wireless communication. Is provided. The management device controls the second storage unit that stores the data and the radio wave intensity data, the position data, and the time data received by radio communication from the radio wave measuring device side to store them in the second storage unit A second storage control unit; and an output control unit that controls to output the radio wave intensity data, the position data, and the time data stored in the second storage unit in a desired format.

  In the management system of the radio wave measuring apparatus having such a configuration, the management apparatus acquires the radio wave intensity data, the position data, and the time data acquired by the radio wave measuring apparatus, stores them in the second storage unit, and stores the desired data Output in the format. Then, the measurement information of the radio wave condition in the predetermined space can be appropriately managed in the management device. Therefore, the radio wave condition can be grasped efficiently.

  Moreover, it is good also as a structure further equipped with the flight main-body part which can fly in a predetermined space by the control by radio | wireless communication and mounts a radio wave measuring apparatus. By doing so, radio wave intensity data can be acquired by flying the flight main body at high speed, and radio wave conditions in a wide area can be efficiently investigated.

  According to the radio wave measuring apparatus and the unmanned aerial vehicle configured as described above, the radio wave situation can be efficiently grasped.

  Also, according to such a radio wave measuring device management system, radio wave condition measurement information can be appropriately managed.

1 is a schematic perspective view showing the appearance of an unmanned aerial vehicle equipped with a radio wave measuring apparatus according to an embodiment of the present invention. It is a block diagram which shows the structure of the management system of the electromagnetic wave measuring device which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of a process in the case of measuring the electromagnetic wave intensity of predetermined space using the management system of the electromagnetic wave measuring apparatus shown in FIG. It is a graph which shows the position data of the horizontal direction of the unmanned aerial vehicle measured by the radio wave measuring device concerning one embodiment of this invention. It is a graph which shows the position data of the height direction of the unmanned aerial vehicle measured by the radio wave measuring device concerning one embodiment of this invention. It is a graph which shows the field intensity data measured by the field measuring device concerning one embodiment of this invention.

  Next, an embodiment of a radio wave measuring apparatus according to the present invention will be described with reference to FIGS. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  FIG. 1 is a schematic perspective view showing the appearance of an unmanned aerial vehicle equipped with a radio wave measuring apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the radio wave measuring apparatus management system according to the embodiment of the present invention. An arrow X in FIG. 1 indicates the traveling direction of the unmanned aircraft, an arrow Y in FIG. 1 indicates a direction perpendicular to the traveling direction of the unmanned aircraft, and an arrow Z in FIG. 1 indicates the height direction of the unmanned aircraft. The direction indicated by the arrow X indicates the forward direction in which the unmanned aircraft advances, and the direction indicated by the arrow Z indicates the direction in which the unmanned aircraft rises.

  Referring to FIGS. 1 and 2, radio wave measuring apparatus 21 according to an embodiment of the present invention measures radio waves in a predetermined space. The predetermined space here is, for example, an area belonging to a range of several tens of square meters (meters) to several square kilometers as the area of the site, and is several meters from the ground as the height, so-called altitude. It belongs to the range up to 100m.

  The radio wave measuring device 21 is mounted on the unmanned aircraft 11. Here, the configuration of the unmanned aerial vehicle 11 will be briefly described. The unmanned aerial vehicle 11 includes a flight main body 12 capable of flying in a predetermined space by maneuvering by wireless communication, and the radio wave measuring device 21 described above. Here, the flight main body 12 is obtained by excluding the radio wave measuring device 21 from the unmanned aircraft 11.

  The unmanned aerial vehicle 11 is in contact with the ground when it is lowered to the ground, the body 13 having a built-in control unit for controlling the operation of the unmanned aircraft 11 itself, six blades 14a, 14b, 14c, 14d, 14e, and 14f. A pair of legs 15a and 15b, a mounting portion 16 used when mounting a photographing device such as a camera, a measurement base material, and the like, and an unmanned aircraft antenna 17 that transmits and receives radio waves during wireless communication. . The six blades 14a to 14f are attached to the tip portions of six support portions 18a, 18b, 18c, 18d, 18e, and 18f that extend radially from the center of the body portion 13, respectively. The six support portions 18a to 18f are provided with an angle of 60 degrees. The leg portions 15 a and 15 b are provided so as to extend from the lower side of the trunk portion 13 with an interval in an oblique direction. The unmanned aerial vehicle 11 is configured such that the legs 15a and 15b come into contact with the ground when descending to the ground. The unmanned aircraft antenna 17 is attached to the upper portion of the trunk portion 13. The unmanned aerial antenna 17 is provided so as to extend in the height direction of the unmanned aerial vehicle 11.

  The unmanned aerial vehicle 11 has a configuration capable of flying in the X direction, the Y direction, and the Z direction in FIG. 1 by maneuvering by wireless communication. Various speeds are set for the unmanned aircraft 11 from several kilometers per hour to several tens of kilometers per hour.

  Next, the configuration of the radio wave measuring device 21 will be described. The radio wave measuring device 21 includes a rectangular parallelepiped resin case 22, a radio wave measuring device control unit 23 mounted on a substrate, a memory 24 as a first storage unit for storing data, and a predetermined frequency band. And a first antenna 25 as a first receiving unit for receiving radio waves. The memory 24 may be provided detachably on the radio wave measuring device 21. As the memory 24, for example, an SD memory is employed. A substrate on which the radio wave measuring device control unit 23 is mounted is surrounded by the housing 22. The casing 22 constituting the main outer shape of the radio wave measuring device 21 is a so-called small size. Specifically, the length in the vertical direction shown in the X direction is about 43 mm (millimeters), and the horizontal direction shown in the Y direction. The length is about 65 mm, and the length in the height direction shown in the Z direction is about 25 mm. Note that the radio wave measuring device 21 can be manufactured at a relatively low cost.

  The radio wave measuring device 21 is mounted so as to be mounted on the upper portion of the trunk portion 13. Specifically, in consideration of the balance during the flight of the unmanned aircraft 11, the unmanned aircraft 11 is attached to the center in the Y direction and closer to the rear side of the trunk portion 13.

  The first antenna 25 is a so-called planar antenna and is provided outside the housing 22. Specifically, the first antenna 25 is provided outside the housing 22 with a string-like connection portion interposed therebetween. The first antenna 25 receives, as a predetermined frequency band, radio waves in a frequency band ranging from 2.4 GHz (gigahertz) to 2.5 GHz, more specifically, a frequency band ranging from 2.401 GHz to 2.493 GHz. . The first antenna 25 is attached with a string-like member, and its position is fixed. Therefore, the position of the first antenna 25 is stable during the flight of the unmanned aircraft 11. By adopting such a planar antenna as the first antenna 25, the radio wave reception direction can be limited to some extent, and the radio wave desired by the measurer can be received.

  The radio wave measurement device 21 includes a radio wave intensity data acquisition unit 26, a position data acquisition unit 27, a time data acquisition unit 28, and a first storage control unit 29. The radio wave intensity data acquisition unit 26 scans radio waves in a frequency band of 2.401 GHz to 2.493 GHz received by the first antenna 25 at a time interval of 1 m (millisecond) seconds to 100 seconds, here 100 milliseconds. Radio wave intensity data, which is predetermined, here, radio wave intensity data for each frequency of 1 MHz, is acquired. The position data acquisition unit 27 is a second reception unit that receives GPS (Global Positioning System) data that is one of GNSS radio waves transmitted from the global positioning satellite system (GNSS (Global Navigation Satellite System)). The antenna 31 is included. The position data acquisition unit 27 acquires GPS data, which is position data indicating the position of the radio wave measurement device 21 when the radio wave intensity data acquisition unit 26 acquires the radio wave intensity data, via the second antenna 31. That is, the position data acquisition unit 27 acquires GPS data that is position data every 100 milliseconds. The time data acquisition unit 28 acquires time data indicating the time when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit 26 from the GPS data. That is, the time data acquisition unit 28 acquires time data every 100 milliseconds. Note that the timing at which position data is acquired by the position data acquisition unit 27 and the timing at which time data is acquired by the time data acquisition unit 28 are the same. The first storage control unit 29 associates the radio wave intensity data acquired by the radio wave intensity data acquisition unit 26, the position data acquired by the position data acquisition unit 27, and the time data acquired by the time data acquisition unit 28, into the memory 24. Control to memorize.

  The radio wave measuring device 21 includes a geomagnetic sensor 33 as an azimuth data acquiring unit that acquires azimuth data indicating the azimuth in which the radio wave measuring device 21 moves. The geomagnetic sensor 33 acquires azimuth data indicating the direction in which the radio wave measurement device 21 moves when the radio wave intensity data acquisition unit 26 acquires the radio wave intensity data. The first storage control unit 29 controls to store the azimuth data acquired by the geomagnetic sensor 33 in the memory 24 in association with the radio wave intensity data.

  The radio wave measuring device 21 includes an acceleration sensor 34 that detects the acceleration of the radio wave measuring device 21, a gyro sensor 35 that detects the angular velocity of the radio wave measuring device 21, and a built-in battery 36 that supplies power to the radio wave measuring device 21. Prepare. The acceleration sensor 34 acquires acceleration data when the radio wave intensity data acquisition unit 26 acquires the radio wave intensity data. The gyro sensor 35 acquires angular velocity data when the radio wave intensity data acquisition unit 26 acquires the radio wave intensity data. The first storage controller 29 controls the acceleration data acquired by the acceleration sensor 34 and the angular velocity data acquired by the gyro sensor 35 to be stored in the memory 24 in association with the radio wave intensity data.

  The radio wave measuring device 21 includes a radio wave measuring device radio communication unit 37 that performs radio communication with the outside, and a transmission control unit 38. In this case, the radio wave measuring device wireless communication unit 37 performs wireless communication with a management device 41 described later. The transmission control unit 38 controls to transmit the radio wave intensity data, the position data, and the time data stored in the memory 24 to the management device 41 at a predetermined timing by wireless communication.

  Next, the configuration of the management device 41 included in the management system 19 of the radio wave measurement device 21 according to the present invention will be described. The management device 41 is configured to be able to wirelessly communicate with the radio wave measurement device 21. The management device 41 is a management device control unit 42 that controls the management device 41 itself, a management device wireless communication unit 43 that establishes wireless communication between the management device 41 and the outside, and a second storage unit that stores data. A hard disk 44. The management device control unit 42 receives the radio wave intensity data, the position data, and the time data received from the radio wave measurement device 21 by wireless communication and stores them in the hard disk 44, and the hard disk 44 And an output control unit 46 that controls to output the radio wave intensity data, the position data, and the time data stored in 44 in a desired format. As the management device 41, for example, a database server or a computer can be employed. Moreover, for example, a large capacity memory can be adopted as the second storage unit.

  Next, a case where the radio field intensity in a predetermined space is measured using the management system 19 of the radio wave measurement device 21 mounted on the unmanned aerial vehicle 11 will be described. FIG. 3 is a flowchart showing the flow of processing when measuring the radio field intensity in a predetermined space using the management system 19 of the radio wave measuring apparatus 21 shown in FIG.

  Also referring to FIG. 3, first, unmanned aerial vehicle 11 equipped with radio wave measuring device 21 is prepared. That is, an unmanned aircraft 11 as shown in FIG. 1 is prepared. In this case, as described above, the radio wave measuring device 21 is mounted and prepared so as to be mounted on the upper side of the trunk portion 13 of the flight main body portion 12.

  Then, flight of the unmanned aerial vehicle 11 is started in the space where the radio field intensity is to be measured (in FIG. 3, step S11, hereinafter “step” is omitted). In this case, the unmanned aircraft 11 is caused to fly by maneuvering by the operator by wireless communication.

  Then, the first antenna 25 receives radio waves in a frequency band ranging from 2.401 GHz to 2.493 GHz (S12). Thereafter, the radio wave intensity data acquisition unit 26 acquires radio wave intensity data every 100 milliseconds (S13). Specifically, the received radio wave frequency is sequentially scanned every 1 MHz to obtain a total of 93 radio wave intensity data. Here, at the time of acquiring the radio wave intensity data, the position data and the time data are also acquired by the position data acquiring unit 27 and the time data acquiring unit 28, respectively (S14).

  Thereafter, the first storage control unit 29 stores the acquired radio wave intensity data, the acquired position data, and the acquired time data in the memory 24 (S15). Then, the transmission control unit 38 controls to transmit the radio wave intensity data, the position data, and the time data stored in the memory 24 to the management device 41 at a predetermined timing by wireless communication (S16). Here, as the predetermined timing, for example, control is performed so as to transmit radio wave intensity data and the like every 100 milliseconds. In this case, it is performed via the radio wave measuring device wireless communication unit 37 and the management device wireless communication unit 43. In this case, it is almost equivalent to so-called real-time transmission.

  The management device 41 receives the transmitted radio wave intensity data, position data, and time data (S17). Then, the second storage control unit 45 controls to receive the radio wave intensity data, the position data, and the time data received by radio communication from the radio wave measuring device 21 side and store them in the hard disk 44 (S18). This is performed until the flight ends (YES in S19). Note that the unmanned aerial vehicle 11 is made to fly by the measurer flying through the unmanned aircraft 11 throughout a predetermined space.

  The radio wave intensity data, position data, and time data stored in the hard disk 44 are output in a format desired by the user. That is, the output control unit 46 included in the management device 41 controls to output the radio wave intensity data, the position data, and the time data stored in the hard disk 44 in a desired format.

  FIG. 4 is a graph showing position data in the horizontal direction of the unmanned aerial vehicle 11 measured by the radio wave measuring apparatus 21 according to the embodiment of the present invention. In FIG. 4, the vertical axis indicates latitude (°), and the horizontal axis indicates longitude (°). FIG. 5 is a graph showing position data in the height direction of the unmanned aerial vehicle 11 measured by the radio wave measuring apparatus 21 according to the embodiment of the present invention. In FIG. 5, the vertical axis indicates the height (m), and the horizontal axis indicates the longitude (°). FIG. 6 is a graph showing radio wave intensity data measured by the radio wave measuring apparatus 21 according to one embodiment of the present invention. In FIG. 6, the vertical axis represents radio wave intensity (dBM), and the horizontal axis represents frequency (MHz). 4 to 6 are diagrams displayed on a display screen of a display connected to the management device 41, for example.

  In addition, referring to FIGS. 4 to 6, what kind of locus the unmanned aircraft 11 is flying in, that is, which position in the horizontal direction is flying from the position data with reference to FIG. 4. Can be grasped. Further, referring to FIG. 5, it is possible to grasp which position in the height direction is flying from the position data. And the radio wave condition in each position can be grasped from the time data and radio wave intensity data corresponding to the position data shown in FIGS. With reference to FIG. 6, the radio wave condition at a certain position 47 shown in FIGS. 4 and 5 can be grasped. Specifically, the radio wave intensity is higher than −50 dBm in the frequency range of 2.462 MHz to 2.474 MHz in FIG. That is, at this position 47, it can be easily grasped visually that the radio wave intensity of frequencies 2.462 MHz to 2.474 MHz is higher than other frequencies.

  As described above, according to such a configuration, the radio wave intensity data is obtained by scanning at a very short time interval such as a 100 msec time interval, and the position data and time data when the radio wave intensity data is obtained are also obtained. Therefore, for example, even when the radio wave measuring device 21 is moved at a high speed on a large site and the radio wave intensity is measured, the radio wave intensity data at each position and each time can be obtained with high accuracy. Based on the radio wave intensity data, position data, and time data stored in the memory 24 and associated with each other, it is possible to accurately know the radio wave status at each position and each time in a predetermined space. Therefore, the radio wave measuring apparatus 21 having such a configuration can efficiently grasp the radio wave situation.

  Also, according to such an unmanned aerial vehicle 11, a wide range of radio wave intensity data in the radio wave measuring device 21 is efficiently acquired together with position data and time data using a flight main body that flies at high speed in a predetermined space. be able to. Therefore, the radio wave condition can be grasped efficiently.

  In addition, the management system 19 of the radio wave measuring device 21 acquires the radio wave intensity data, the position data, and the time data acquired by the radio wave measuring device 21 in the management device 41, stores them in the hard disk 44, and stores them as desired. It is supposed to output in the format. Then, the measurement information on the radio wave condition in the predetermined space can be appropriately managed in the management device 41. Therefore, the radio wave condition can be grasped efficiently. Further, the radio wave intensity data and the like stored in the hard disk 44 can be centrally managed and distributed as information in a GIS (Geographic Information System) (geographic information system) in the management device 41.

  In the present embodiment, the radio wave measuring device 21 further includes a radio wave measuring device radio communication unit 37 that outputs the radio wave intensity data, the position data, and the data stored in the memory 24 to the outside by radio communication. Therefore, the stored radio wave intensity data, position data, and time data can be output to the outside, here the management device 41, by wireless communication in real time. Therefore, the radio wave intensity data at the position requested by the measurer can be measured more appropriately.

  Further, in the present embodiment, since the position data includes the height data of the radio wave measuring device 21, radio wave intensity data corresponding to the height direction in a predetermined space can be acquired, which is more desired by the measurer. Radio wave intensity data can be acquired. In particular, in this case, radio wave intensity data in the height direction can be acquired in a wider range, and radio wave conditions in a predetermined space can be grasped more accurately three-dimensionally.

  In the present embodiment, the radio wave measuring device 21 includes a geomagnetic sensor 33 that acquires azimuth data indicating the direction in which the radio wave measuring device 21 moves, and the first storage control unit 29 acquires the geomagnetic sensor 33. Since the azimuth data is controlled so as to be associated with the radio wave intensity data and stored in the memory 24, the position of the radio wave measuring device 21 that moves continuously more accurately can be grasped together with the azimuth data.

  In the present embodiment, since the position data acquisition unit 27 includes the second antenna 31 that receives the GNSS radio wave transmitted from the global positioning satellite system (GNSS), the position data of the radio wave measurement device 21 is more accurate. Can get well.

  In the present embodiment, the first antenna 25 is provided outside the housing 22 with a string-like connection portion interposed therebetween, and therefore can receive radio waves more appropriately. In particular, in this case, the first antenna 25 can be positioned on the lower side or the rear side, and interference with radio waves when acquiring position data received mainly on the upper side can be suppressed.

  In the present embodiment, the position data acquisition unit 27 includes a second antenna 31 that receives a GNSS radio wave transmitted from a GNSS (global positioning satellite system), and the radio wave measurement device 21 includes the second antenna 31. Is mounted on the flight main body 12 so that the radio wave is directed upward, it is possible to suppress interference between the GNSS radio wave and the radio wave measured by the radio wave measuring device 21 in a predetermined space.

  In the above embodiment, the time interval for acquiring the radio wave intensity data is set to 100 msec. However, the time interval for acquiring the radio wave intensity data is not limited to this, and may be in the range of 1 msec to 100 sec. According to such a range, the possibility of acquiring data more than necessary can be reduced, and the influence of the deviation of the acquired radio wave intensity data in the acquired position data and acquired time data can be reduced. More preferably, it is good to set it as the range of the range of 10 milliseconds-1 second. Here, when the radio wave measuring device 21 is mounted on the unmanned aerial vehicle 11, the measurement time interval may be changed according to the speed of the unmanned aircraft 11. For example, as the speed of the unmanned aerial vehicle 11 increases, control is performed to shorten the time interval for measurement. With such a configuration, it is possible to measure the radio field intensity with high accuracy regardless of the unmanned aircraft 11 and the movement speed of the radio wave measurement device 21.

  Moreover, in said embodiment, although it was set as the structure provided with the geomagnetic sensor 33 as an azimuth | direction data acquisition part, it is good also as a structure which is not restricted to this but does not have an azimuth | direction data acquisition part. Further, the GPS data is acquired and the position data is acquired. However, the present invention is not limited to this, and the position data may be acquired by another method.

  Further, the acceleration data and the angular velocity data acquired together with the position data and stored in the memory 24 may be output together with the position data and used for grasping the radio wave condition. That is, the radio wave measurement device 21 may further include a posture data acquisition unit that acquires posture data indicating the posture of the radio wave measurement device 21 when the radio wave strength data acquisition unit 26 acquires the radio wave strength data. It is possible to appropriately acquire the azimuth data of the radio wave source to be measured. If such a configuration is adopted, the above-described geomagnetic sensor can be omitted. It can also be reflected in the control of the attitude of the unmanned aerial vehicle 11 itself. Furthermore, the acquired attitude data of the radio wave measuring device 21 can be used for checking the installation state of the radio wave measuring device 21 to the unmanned aircraft 11 by comparing it with the attitude data of the unmanned aircraft 11 itself. Specifically, when there is a deviation between the attitude data of the unmanned aerial vehicle 11 and the attitude data of the radio wave measuring device 21, it is assumed that an improper attachment or malfunction of the radio wave measuring device 21 to the unmanned aircraft 11 has occurred. , Can prompt the check of the installation status.

  In the above-described embodiment, the second antenna 31 is provided outside the housing 22. However, the present invention is not limited to this, and the second antenna 31 may be provided inside the housing 22. In addition, the radio wave measuring device 21 is mounted on the flight main body 12 so that the second antenna 31 faces upward. However, the present invention is not limited to this, and a situation in which interference does not occur and a technique for preventing interference are mounted. If so, the direction of the second antenna 31 may be arbitrarily determined.

  In the above embodiment, a planar antenna is adopted as the first antenna 25. However, the present invention is not limited to this, and a string-like antenna such as a sleeve antenna may be used. In this case, a straw-shaped member may be prepared, and a string-shaped antenna may be inserted into the member to stabilize the position. Furthermore, it is good also as attaching a directional antenna to the front-end | tip part of a string-like antenna. By doing so, it is possible to roughly limit the receiving direction of the radio wave to improve the directivity and to easily receive the radio wave desired by the measurer and desired to be measured. That is, since some antennas have various functions, it is possible to change the antenna and acquire the radio field intensity under various conditions according to the characteristics of the antenna. The first antenna 25 may be a type of antenna built in the housing 22.

  In the above embodiment, the predetermined frequency band is in the range of 2.4 GHz to 2.5 GHz. However, the present invention is not limited to this, and if the frequency band desired by the user is a narrower range, the range, For example, it may be in the range of 2.401 GHz to 2.450 GHz, or may be a band having a frequency lower than 2.4 GHz or a band having a frequency higher than 2.5 GHz. Furthermore, the predetermined frequency is not limited to 1 MHz, and other frequencies such as 0.5 MHz and 2 MHz may be selected according to the required accuracy.

  In the above embodiment, the unmanned aerial vehicle 11 includes the six blades 14a to 14f. However, the number of blades is not particularly limited. For example, two blades or four blades are used. , Eight blades, or more than ten blades may be provided. That is, the flight form in the unmanned aircraft 11 is not particularly limited.

  In the above embodiment, the case where the radio wave measuring device 21 is mounted on the unmanned aerial vehicle 11 has been described. However, the present invention is not limited to this. Although it cannot be measured, the radio wave intensity may be measured by mounting the radio wave measuring device 21 on an unmanned vehicle that can be operated by wireless communication, an unmanned ship that runs on the sea, or a taxi.

  The time data acquisition unit 28 includes a timer built in the radio wave measurement device 21, and the time data acquisition unit 28 indicates time when the radio wave intensity data acquisition unit 26 acquires the radio wave intensity data. May be obtained from a timer. By doing so, it is possible to cope with the case where time data cannot be acquired from the GNSS data. It is preferable to employ such a configuration particularly in a room or the like. Of course, it is also possible to obtain the time data from the timer in a situation where both times are obtained and GNSS data cannot be obtained.

  It should be understood that the embodiments disclosed herein are illustrative in all respects and are not restrictive in any aspect. The scope of the present invention is defined by the scope of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the scope of the claims.

  The radio wave measurement device, the unmanned aircraft, and the radio wave measurement device management system of the present application can be particularly advantageously applied when efficient grasping of radio wave conditions is required.

11 Unmanned Aircraft, 12 Flight Body, 13 Body, 14a, 14b, 14c, 14d, 14e, 14f Blade, 15a, 15b Leg, 16 Attachment, 17 Unmanned Aircraft Antenna, 18a, 18b, 18c, 18d, 18e , 18f Support unit, 19 Radio wave measurement device management system, 21 Radio wave measurement device, 22 Housing, 23 Radio wave measurement device control unit, 24 Memory, 25 First antenna, 26 Radio wave intensity data acquisition unit, 27 Position data acquisition unit , 28 Time data acquisition unit, 29 First storage control unit, 31 Second antenna, 33 Geomagnetic sensor, 34 Acceleration sensor, 35 Gyro sensor, 36 Battery, 37 Radio wave measuring device wireless communication unit, 38 Transmission control unit, 41 Management device, 42 Management device control unit, 43 Management device wireless communication unit, 44 c De disk, 45 second storage control unit, 46 an output control unit, 47 position.

Claims (13)

A radio wave measuring device for measuring radio waves in a predetermined space,
A first storage unit for storing data;
A first receiver for receiving radio waves in a predetermined frequency band;
Radio wave intensity data, which is radio wave intensity data for each predetermined frequency, is obtained by scanning the radio wave of the predetermined frequency band received by the first receiving unit at a time interval of 1 m (millisecond) to 100 seconds. Radio wave intensity data acquisition unit
A position data acquisition unit that acquires position data indicating a position of the radio wave measurement device when the radio field intensity data is acquired by the radio field intensity data acquisition unit;
A time data acquisition unit for acquiring time data indicating a time when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit;
The radio wave intensity data acquired by the radio wave intensity data acquisition unit, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit are linked and stored in the first storage unit And a first storage control unit that controls the radio wave measurement device. The radio wave measurement apparatus according to claim 1, further comprising a radio communication unit that outputs the radio wave intensity data, the position data, and the data stored in the first storage unit to the outside through radio communication. An azimuth data acquisition unit that acquires azimuth data indicating the direction of movement of the radio wave measurement device when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit;
The first storage control unit controls the azimuth data acquired by the azimuth data acquisition unit to be stored in the first storage unit in association with the radio wave intensity data. The radio wave measuring device described. The said position data acquisition part contains the 2nd receiving part which receives the GNSS radio wave transmitted from a global positioning satellite system (GNSS (Global Navigation Satellite System)) in any one of Claims 1-3. The radio wave measuring device described. The radio wave measuring apparatus according to any one of claims 1 to 4, wherein the position data includes height data of the radio wave measuring apparatus. Including a housing covering the first storage unit;
The radio wave measuring apparatus according to any one of claims 1 to 5, wherein the first receiving unit is provided outside the housing with a string-like connecting unit interposed therebetween. The attitude data acquisition unit that acquires attitude data indicating an attitude of the radio wave measurement device when the radio field intensity data is acquired by the radio field intensity data acquisition unit. The radio wave measuring device described. The predetermined frequency band is in a range of 2.4 GHz to 2.5 GHz,
The radio wave measuring apparatus according to claim 1, wherein the predetermined frequency is 1 MHz. An unmanned aerial vehicle including a flight main body capable of flying in a predetermined space by maneuvering by wireless communication, and a radio wave measuring device mounted on the flight main body and measuring radio waves in the predetermined space where the flight main body is located Because
The radio wave measuring device is
A first storage unit for storing data;
A first receiver for receiving radio waves in a predetermined frequency band;
A radio wave intensity data acquisition unit that scans radio waves in the predetermined frequency band received by the first reception unit at predetermined time intervals to acquire radio wave intensity data that is radio wave intensity data for each predetermined frequency; ,
A position data acquisition unit that acquires position data indicating a position of the radio wave measurement device when the radio field intensity data is acquired by the radio field intensity data acquisition unit;
A time data acquisition unit for acquiring time data indicating a time when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit;
The radio wave intensity data acquired by the radio wave intensity data acquisition unit, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit are linked and stored in the first storage unit An unmanned aerial vehicle comprising: a first storage control unit that controls to perform the operation. The unmanned aerial vehicle according to claim 9, wherein the radio wave intensity data acquisition unit measures the radio wave intensity data for each predetermined frequency by scanning at a time interval of 1 ms to 100 seconds. The position data acquisition unit includes a second receiving unit that receives a GNSS radio wave transmitted from the global positioning satellite system GNSS,
The unmanned aerial vehicle according to claim 9 or 10, wherein the radio wave measuring device is mounted on the flight main body so that the second receiving unit faces upward. Management of a radio wave measuring apparatus including a radio wave measuring apparatus that measures radio waves in a predetermined space, and a management apparatus that is capable of wireless communication with the radio wave measuring apparatus and that manages the radio wave data measured by the radio wave measuring apparatus A system,
The radio wave measuring device is
A first storage unit for storing data;
A first receiver for receiving radio waves in a predetermined frequency band;
Radio wave intensity for acquiring radio wave intensity data that is radio wave intensity data for each predetermined frequency by scanning the radio wave of the predetermined frequency band received by the first receiving unit at a time interval of 1 to 100 seconds. A data acquisition unit;
A position data acquisition unit that acquires position data indicating a position of the radio wave measurement device when the radio field intensity data is acquired by the radio field intensity data acquisition unit;
A time data acquisition unit for acquiring time data indicating a time when the radio wave intensity data is acquired by the radio wave intensity data acquisition unit;
The radio wave intensity data acquired by the radio wave intensity data acquisition unit, the position data acquired by the position data acquisition unit, and the time data acquired by the time data acquisition unit are linked and stored in the first storage unit A first storage control unit for controlling to
A transmission control unit that controls the radio field intensity data, the position data, and the data stored in the first storage unit to be transmitted to the management device at a predetermined timing by wireless communication;
The management device
A second storage unit for storing data;
A second storage control unit that controls to receive and store the radio field intensity data, the position data, and the time data received by wireless communication from the radio wave measuring device side in the second storage unit;
A radio wave measuring device management system comprising: an output control unit that controls to output the radio wave intensity data, the position data, and the time data stored in the second storage unit in a desired format. The radio wave measuring device management system according to claim 12, further comprising a flight main body portion on which the radio wave measuring device is mounted, which is capable of flying in a predetermined space by maneuvering by wireless communication.

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