JP-2026074839-A - Four-dimensional mapping information generation system

JP2026074839AJP 2026074839 AJP2026074839 AJP 2026074839AJP-2026074839-A

Abstract

[Challenge] Use subsurface 3D information as a benchmark to accurately identify and extract surface 3D positional information. [Solution] The system includes a subterranean exploration means 20 that generates subterranean three-dimensional information beneath the road surface on which the exploration vehicle 10 travels, a ground image generation means 30 that generates ground-level three-dimensional images on the road surface on which the exploration vehicle 10 travels, a unification processing unit 50 that generates unified information from the subterranean to the ground space through a predetermined data unification process, an unification information storage unit 61 that stores multiple unified pieces of information generated at different times, and an unification information extraction unit 62 that extracts multiple unified pieces of information from the stored unified pieces of information that are generated at different times and whose ground positions coincide based on the subterranean three-dimensional information, thereby generating four-dimensional mapping information by adding time axis information to the unified three-dimensional information from the subterranean and ground. [Selection Diagram] Figure 1

Inventors

篠原潤
谷田幸治
加藤祐悟
新▲崎▼ 隆弘
馬場務

Assignees

株式会社カナン・ジオリサーチ

Dates

Publication Date: 20260507
Application Date: 20241021

Claims (5)

A ground-penetrating exploration means is installed on a road-traveling exploration vehicle and generates three-dimensional underground information beneath the road surface on which the exploration vehicle travels. The exploration vehicle is equipped with a ground image generation means that generates a three-dimensional ground image of the road surface on which the exploration vehicle travels, A data unification processing means generates unified information from underground to surface space by performing a predetermined data unification process on the three-dimensional underground information generated by the underground exploration means and the three-dimensional surface image generated by the surface image generation means. A unified information storage means that stores multiple unified pieces of information generated at different times, with time axis information indicating the generation time added to them. The system includes a unified information extraction means that extracts multiple unified pieces of information from the accumulated unified pieces of information, based on the underground three-dimensional information, that are generated at different times but have the same above-ground location, A four-dimensional mapping information generation system characterized by generating four-dimensional mapping information by adding time axis information to unified three-dimensional information of underground and above ground.
The four-dimensional mapping information generation system according to claim 1, further comprising a comparison image generation means for outputting a plurality of ground-based three-dimensional images, each with the same ground position but generated at different times, from the plurality of extracted unified information, in a comparative manner.
The unified information extraction means is, A four-dimensional mapping information generation system according to claim 1 or 2, characterized in that it extracts multiple unified pieces of information that are generated at different times but have the same above-ground location, based on three-dimensional positional information of underground cavities and/or buried objects.
The aforementioned unified information storage means is As multiple unified pieces of information with different generation times but matching ground locations, A four-dimensional mapping information generation system according to claim 1 or 2, characterized in that it stores unified information generated during normal times and unified information generated during disasters.
The aforementioned terrestrial image generation means A feature point extraction unit automatically extracts a predetermined number of feature points from the image data of the aforementioned three-dimensional terrestrial video, A feature point matching processing unit automatically tracks the extracted feature points within each frame image of the video footage to determine the correspondence between the frame images, The system includes a camera vector calculation unit that calculates the three-dimensional position coordinates of the feature points for which a correspondence has been determined, and from these three-dimensional position coordinates, calculates a camera vector consisting of the three-dimensional position coordinates and three-dimensional rotation coordinates of the camera corresponding to each frame image, and a camera vector calculation means having these units. The aforementioned unified processing means, A four-dimensional mapping information generation system according to claim 1 or 2, characterized in that it unifies the underground three-dimensional information and the above-ground three-dimensional image based on the camera vector generated by the camera vector calculation means and the position coordinate information contained in the underground three-dimensional information.

Description

This invention relates to a four-dimensional mapping information generation system that generates unified information by combining three-dimensional underground information generated by underground exploration technology and three-dimensional ground images acquired by an in-vehicle camera, etc., and further generates four-dimensional mapping information by adding time axis information to the unified underground and ground information. In recent years, natural disasters such as earthquakes, typhoons, torrential rains, and localized heavy rains have been occurring frequently, and it is predicted that these will become even more severe and large-scale disasters may occur in the future. Therefore, countermeasures against large-scale disasters, especially efforts toward recovery before they occur, have become an urgent issue that cannot be ignored. Pre-disaster recovery is an initiative to take measures in advance to minimize damage in the event of an earthquake. As a measure for early recovery and reconstruction in the event of large-scale earthquakes expected to occur in the future, such as the Nankai Trough earthquake and the Tokyo metropolitan area earthquake, pre-disaster recovery efforts, which involve preparing for post-disaster recovery in advance, are becoming increasingly important, alongside disaster prevention and mitigation measures. One of the challenges in the recovery and reconstruction of disaster-stricken areas is the lack of accurate location tracking of underground utilities such as water pipes. For example, the Noto Peninsula Earthquake in 2024 caused extensive damage to roads and water supply systems, resulting in water outages in several municipalities for several months, which significantly hindered the reconstruction of lives—a fact still fresh in our memories. Factors contributing to the delay in water restoration include the fact that, in normal times, sufficient surveys of aging water pipes and other infrastructure are not conducted, and even after a disaster, it is difficult to accurately determine the location of various buried structures, including water pipes, which are intricately laid out underground. Furthermore, in the disaster-stricken areas, delays in the restoration of water supply have forced many victims, even those whose homes and other structures remain intact, to continue evacuating to shelters and evacuation centers. This delay in early recovery is a major problem, especially in terms of population outflow from the region. Furthermore, during the reconstruction efforts following the Great East Japan Earthquake, the fact that the reference points used as the basis for surveying shifted by several meters due to the earthquake became a major obstacle to the progress of reconstruction plans, particularly the reconstruction of homes that had been swept away by the tsunami. For housing reconstruction, it is first necessary to determine the boundaries of each property, but if all above-ground structures are swept away by a tsunami, not only are there no reference points, but there are also no buildings or structures that can be used as references. In that case, even if one tries to adjust based on coordinates, if the reference points are shifted or have disappeared, the coordinate (absolute coordinate) information will also be useless. As a result, until correct reference points become available, surveying to determine the boundaries cannot begin for, say, several months, and housing reconstruction will be greatly delayed. Therefore, in Japan, a country prone to earthquakes, including the Nankai Trough earthquake predicted to occur in the future, achieving early recovery and reconstruction after a disaster requires measures and surveying techniques that do not rely on surveying reference points. These techniques enable the rapid and accurate acquisition of subsurface information linked to surface information, and allow for the quick and accurate determination of surface locations even if, for example, surveying reference points are displaced or lost due to earthquakes or tsunamis. Furthermore, infrastructure such as roads, bridges, tunnels, and sewage systems, which were developed during the period of rapid economic growth, will see an accelerating increase in the proportion of facilities that will deteriorate in the future. Such aging infrastructure can lead to serious problems such as accidents that endanger human lives and disruptions to lifelines, making it an urgent issue to address aging infrastructure. Furthermore, work is underway to replace aging buried pipes such as water and sewage lines, and to remove utility poles, particularly along transportation routes that are crucial for saving lives and transporting relief supplies during disasters, which have become increasingly severe and frequent in recent years. Managing and maintaining such infrastructure requires considerable expense, time, and effort, and effective responses and measures are needed to efficiently ca