JP2020065221A - On-site investigation system using drone - Google Patents

Abstract

To provide an on-site investigation system using a drone, in which both on-site information and management side instruction information can be exchanged quickly and accurately.SOLUTION: An on-site investigation system using a drone is provided with: a drone 1; a ground video camera 7 for capturing images around an on-site command post; a video mixer 8 into which video signals of an aerial camera and the ground video camera are input: a monitor 9 for displaying an aerial video or a ground video by video signals output from the video mixer 8; an on-site video signal converter 11 configured to convert video signals output from the video mixer 8 so that the same video as the monitor 9 can be displayed on a smart phone 20 by a wireless router 10; a video signal transmitter 13 configured to convert video signals output from the video mixer 8 into transmission video signals and transmitting the transmission video signals to a countermeasures headquarters side through a communication satellite 3; and a telephone set 18 allowing to make a speech at an on-site command post side by allowing the video signal transmitter 13 to receive, through the communication satellite 3, instruction voice signals transmitted from a countermeasures headquarters and by using video wiring as a satellite telephone line.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a field survey system that utilizes an aerial image obtained by using a drone, and more particularly to a field survey system that utilizes a drone that enables a more effective survey at a disaster site or the like.

  The development of so-called drones, which are unmanned aerial vehicles in recent years, is remarkable, and sensors such as acceleration sensors and electronic compass, memories that store shooting cameras and data, GPS functions are added to drones, and altitude maintenance and obstacle avoidance navigation can be performed. By exhibiting its various functions, such as taking pictures and moving pictures, the demand in various fields of use is expanding rapidly.

  In particular, since it is equipped with a camera, GPS, CPU, etc., it can also auto-navigate along a route that has been preliminarily programmed, and the aircraft is far away from the operator so that it can not be seen or people can not go It is possible to navigate in various places, and it is possible to shoot at an angle where people could not see before. For this reason, it has become possible to perform new ground surface analysis by collecting these image data by performing aerial photography in various areas that cannot be seen by humans. In order to improve the ability to collect and analyze such data, we will improve the drone itself to improve stable flight performance (Patent Document 1), improve the aerial imaging capability of the drone (Patent Document 2), and ensure safe flight of the drone. Various proposals have been made regarding the improvement and utilization of drone aircraft such as an operation system to be realized (Patent Document 3).

JP-A-2018-108818 Japanese Patent Laid-Open No. 2018-153027 JP-A-2018-012477

  However, the current use of drones is mainly to fly the drone and simply take aerial images from the sky. Utilization to fully utilize the aerial image data collection function and GPS function installed onboard. It can't be said that is done. In this respect, drones can be easily infiltrated and aerial shots can be taken at places where people cannot go, for example, in steep mountain areas or places where disasters can no longer be entered when a disaster occurs. Opportunities used to investigate the current state of the field are increasing. Such field surveys also include so-called public civil engineering facilities such as rivers, coasts, erosion control facilities, forest land degradation prevention facilities, landslide prevention facilities, and steep slope collapse prevention facilities.

  Aerial surveys using drones are being used in field surveys such as the current situation surveys in disaster areas and the maintenance surveys of public civil engineering facilities. Was carried out exclusively at the site, and the image data collected at the site, for example, was once taken back to the maintenance management department of the above-mentioned public civil engineering facility's jurisdictional ministry, and the data was analyzed to take maintenance measures. However, there is a problem in that it is not possible to give a prompt maintenance work instruction in real time when the image data is collected because the processing is performed. In addition, even in the event of a disaster, it is possible to establish a field system that not only analyzes the site information from the drone, but also confirms and analyzes it not only at the site, but also at a location away from the site, such as the headquarters for countermeasures, and gives specific instructions to the site. It was not there.

  Therefore, the present invention not only confirms and confirms the video data collected by the drone at the site where the investigation is required, but also the analyst and the specific instruction of the management department installed remotely. In addition to being able to deliver in real time to the manager who conducts, the operation instruction contents of the confirmation analysis result can also be transmitted to the worker on the site side, and the site information and the management side instruction information can be The purpose is to provide a field survey system using a drone that can exchange both parties quickly and accurately.

  In order to solve the above problems, the present invention is configured as follows. That is, a field survey system utilizing a drone according to the present invention is a ground video for imaging a drone equipped with at least one or more aerial camera that is put in the sky above the field and an area around a command post where the drone is operated. A camera, video mixer means for inputting video signals from the aerial camera and terrestrial video camera, monitor means for displaying aerial video or terrestrial video according to the video signal output from the video mixer means, and the video mixer An image signal output means for converting the image signal output from the means so that the same image as the monitor means can be displayed on a smartphone around the on-site command station by a wireless router, and an image output from the video mixer means Convert the signal into a transmitted video signal and manage it at a remote location or send it to the headquarters via a communication satellite And a video signal transmitting means that enables transmission, and causes the video signal transmitting means to receive an instruction voice signal transmitted from a remote location management or countermeasure headquarters through the line of a communication satellite, and the video signal transmitting means. Is used as a telephone base station, and the video wiring of the video signal transmitting means is used as a satellite telephone line to provide a communication means capable of making a call on the side of the on-site command post.

  According to the on-site survey system utilizing the drone according to the present invention, the aerial image from the drone that was input by the on-site command post, which is the site of the maintenance survey and the disaster damage investigation, and the area around the on-site post from the ground video camera. The terrestrial video of the site is reproduced on the monitor means via the video mixer means and can be confirmed by the manager of the site command post, etc., and the situation of the site subject to the maintenance investigation and disaster damage investigation can be grasped. it can.

  Also, the video signal output from the video mixer means can be converted by the on-site video signal conversion means and the same image as the monitor means can be displayed on the smartphone around the on-site command post by the wireless router, so that people around the site can easily do it. You can check the scene video.

  In addition, the video signal transmitting means for converting the video signal output from the video mixer means into the transmission video signal can transmit the video of the site through the communication satellite to the remote location management or the countermeasure headquarters, and the remote location management department. On the side, it will be possible to perform confirmation analysis of the site in real time based on the image of the site.

  Further, the video signal transmitting means receives the instruction voice signal transmitted from the remote management or the countermeasure headquarters through the line of the communication satellite, and the video signal transmitting means is the telephone base station, and the video wiring of the video signal transmitting means is the satellite telephone. By using the line as a line, there is a communication means that allows the on-site command line to make a call, so while confirming and analyzing the on-site video transmitted from the site, the headquarters can also change the drone aerial image in real time. Instructions can be given to the site side, and more necessary site images can be properly obtained.

It is a schematic diagram showing an outline of the whole composition of a system concerning the present invention. It is a figure which shows the system configuration which transmits a video signal among this systems in the field side. It is a figure which shows the system configuration which transmits / receives an audio | voice signal among this systems in the field side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing the overall configuration of a site investigation system utilizing a drone according to the present invention. The figure schematically shows an example of implementing the present system, for example, at a site of a forest fire. First, a field command post is set up at the foot of the mountain near the site where the forest fire broke out. The on-site command post 2 is equipped with a video signal processing device of the present system, which will be described later, and the operator 21 who operates the drone 1 and the person who operates the aerial image from the drone 1 to the countermeasure headquarters. Also, site managers are dispatched.

  In the figure, two drones 1 equipped with an aerial camera were put in order to more accurately check the situation at the site, and the drone operator used two drones in the two directions above the forest fire site. Aerial photography to grasp the situation of the site from a distance and perspective, and the aerial image signal is transmitted to the on-site command post 2 and the communication satellite 3 is sent from the on-site command post to the remote disaster response headquarters 4. It is transmitted via the Internet, and the head office side performs confirmation analysis of the site image, and is configured to be able to issue a change operation instruction of the aerial image of the drone to the site side in real time.

  FIG. 2 is a diagram showing a configuration of a processing unit for transmitting a video signal in the system installed on the side of the on-site command post, which outputs a control signal of the drone 1 and an aerial image signal from the drone 1. An aerial image or a terrestrial image depending on a video mixer 8 to which a video signal from the receiving propo 6 and a terrestrial video camera 7 for imaging the situation around the on-site command post 2 side is input, and a video signal output from the video mixer 8 And a monitor 9 for displaying a video signal output from the video mixer 8 so that the wireless router 10 can display the same video as the monitor 9 on the smartphone 20 around the command post 2 on-site. 11 and the video signal output from the video mixer 8 is converted by the converter 12 and the transmitted video signal is transmitted to the remote disaster countermeasure headquarters 4 through the communication satellite 3. It is composed of a video signal transmitter 13 made of down converter and encoder that allows signals. These devices are connected by a so-called HDMI (registered trademark) cable 15 for transmitting video, audio, and control signals. The wireless router 10 and the on-site video signal converter 11 are LAN cables 16 and converters 12. It is connected to the video signal transmitting device 13 via the RCA terminal 17.

  FIG. 3 is a diagram showing an outline of a system configuration for transmitting and receiving an audio signal in the present system. As described above, the system for transmitting a video signal transmitted from the site command post 2 side to the disaster countermeasure headquarters 4 is used. Then, the video signal transmitter 13 receives the instruction voice signal from the telephone 18 installed in the disaster countermeasures headquarters 4 through the line of the communication satellite 3, and the video signal transmitter 13 is used as a telephone base station. The video wiring of is configured to be a satellite telephone line.

  The system is configured as described above, and the aerial image from the drone 1 of the two aircraft that were put into the scene of the forest fire and the ground image around the scene command post 2 from the ground video camera 7 The image is reproduced on the monitor 9 via the video mixer 8 so that the manager of the field command station 2 can confirm it. The images from the two drones 1 were combined on a single screen by the video mixer 8 with a detailed image from the first aircraft approaching the fire scene and an image of the entire scene from the second aircraft, including the areas likely to spread. It can also be projected or combined with the ground image around the command post 2 and projected. By increasing the number of drones 1 to be deployed, more detailed field surveys can be conducted.

  The video signal output from the video mixer 8 is converted by the on-site video signal conversion device 11 and transmitted by the wireless router 10. Therefore, the same image as that on the monitor 9 can be easily obtained by the smartphone 20 even by the persons around the on-site command post. You can check the video on site.

  The video signal output from the video mixer 8 is transmitted to the remote disaster countermeasures headquarters 4 via the communication satellite 3 by the video signal transmitting device 13 for converting into a transmission video signal, and is received by the disaster countermeasures headquarters 4. Therefore, the person in charge of the Sugayori department of the disaster response headquarters 4 can confirm and analyze the image of the site in real time.

  As shown in FIG. 3, an instruction voice signal from a telephone 18 installed in the disaster countermeasures headquarters 4 is received by a video signal transmitter 13 through a line of a communication satellite 3, and the video signal transmitter 13 is used as a telephone base station. Since the video wiring of the video signal transmission device 13 is configured to be a satellite telephone line, the telephone 18 installed on the site command post 2 side can hear the instruction from the disaster countermeasures headquarters 4 and can respond to the instruction content. It is like this. The instructed contents are transmitted to the operator 21 or the flight monitor 22 operating the drone 1 near the field command station 2 via the radio 19. Further, the instruction voice is transmitted to the surrounding parties by the loudspeaker 23. With this configuration, while confirming and analyzing the on-site video transmitted from the site, the headquarters can instruct the site side to change the drone aerial image in real time. It is possible to instruct them to obtain the appropriate scene video.

  As described above, according to the on-site survey system utilizing the drone according to the present invention, conventionally, in the on-site survey of the disaster area, the confirmation of the aerial photography contents and the operation instruction to the aerial photography target are exclusively on-site supervision. Although it was decided by the official, it could be sent in real time to the remotely installed analysts at the disaster response headquarters and the manager in charge of giving specific instructions, and the drone space based on the results of confirmation analysis Since it is possible to directly instruct the scene side to change the shot image and to obtain the more necessary scene image accurately, it is possible to store both the site information and the management side instruction information. You can now communicate quickly and accurately.

  Therefore, by using the drone-based field survey system according to the present invention, when investigating the situation of a disaster site in a place where people and vehicles cannot enter in a severe disaster area, aerial photography is performed from the drone. It is possible to perform more accurate confirmation analysis based on the acquired site video, to take necessary measures promptly, and to play an important role in implementing disaster response.

  In the above example, the disaster site was targeted, but as the site, so-called public civil engineering facilities such as rivers, coasts, erosion control facilities, forest land degradation prevention facilities, landslide prevention facilities, steep slope collapse prevention facilities, etc. are investigated. It can be carried out in any case, and it can also be carried out in a building management survey that takes into account areas that cannot be visually recognized by the human eye. Site surveys can be conducted in various fields.

  For drone aerial photography, by installing a thermo camera or a special-purpose camera in place of the normal camera, it is possible to easily respond to the contents of the site survey requested, and various site surveys can be carried out. You can also do

1 Drone 2 Field Command 3 Communication Satellite 4 Disaster Countermeasures Headquarters 6 Propo 7 Terrestrial Video Camera 8 Video Mixer 9 Monitor
10 wireless router
11 On-site video signal converter
12 converter
13 Video signal transmitter
18 telephone
19 radio
20 smartphone
21 Pilot
22 Flight Supervisor
23 loudspeaker

Claims (1)

A drone equipped with at least one aerial camera that will be placed above the scene,
A terrestrial video camera that takes an image of the area around the command post where the drone is operated,
Video mixer means for inputting video signals from these aerial cameras and terrestrial video cameras,
Monitor means for displaying an aerial image or a terrestrial image according to the image signal output from the video mixer means,
An on-site video signal conversion means capable of converting the video signal output from the video mixer means and displaying the same video as the monitor means on a smartphone around the on-site command station by a wireless router.
And a video signal transmitting means for converting the video signal output from the video mixer means into a transmission video signal and transmitting it to a remote location management or countermeasure headquarters through a communication satellite,
A voice signal transmitted from a remote location management or countermeasure headquarters is received by the video signal transmitting means through a line of a communication satellite, the video signal transmitting means is a telephone base station, and the video wiring of the video signal transmitting means is a satellite telephone. A field survey system using a drone, which is characterized in that it is provided with a communication means that allows the on-site command station to make a call by using it as a line.

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