Yamato Exploration Technology Co., Ltd. Technical Introduction "High-Precision Magnetic Exploration"
Selection by single coil contact in a dual coil type magnetic inclinometer.
"High-Precision Magnetic Survey" is a survey method used to distinguish magnetic responses that resemble small artillery shells. By arranging 15 magnetic gradient meters at 0.5m intervals on a survey frame and converting the digitally measured magnetic anomaly waveforms into contour maps, we can determine the likelihood of small artillery shells based on their patterns. This survey method allows us to narrow down the number of magnetic anomaly points that are targets for underwater exploration to one-third to one-fourth. 【Features】 - This survey method was developed to reduce the duration and cost of underwater exploration by selecting magnetic anomaly points that may indicate small artillery shells from the magnetic anomaly responses. - By converting the abnormal waveforms of dual-coil magnetic gradient meters into abnormal waveforms from a single coil, the contour patterns are simplified. For more details, please contact us or download the catalog.
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basic information
【Construction Method】 ○ Planning Preparation → Same as regular magnetic survey → However, determine the spacing and number of sensors considering the target of the survey ○ Equipment Installation → Same as regular magnetic survey → However, perform a polarity check of the sensors ○ Survey → Same as regular magnetic survey → However, magnetic measurement data, ship position measurement cut marks, and PPS (pulses output every second from the GPS unit) will be A/D converted to obtain digital data → The survey frame will be positioned closer to the seabed than usual, considering the size of the target ordnance 【Determination of the Presence of Ordnance】 ○ Analysis → Use a magnetic quantity calculation formula suitable for the target ordnance → To ensure analysis accuracy, read and analyze the digital measurement waveform on the display 【Effects of Determination】 ○ Example of Results → In cases where high-precision magnetic surveys were conducted, 560 magnetic anomaly points that could be selected as targets were detected within the planned area, but 394 points were excluded as magnetic anomalies with no possibility of being small ordnance ● For more details, please contact us or download the catalog.
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Applications/Examples of results
【Purpose】 ○ Hazardous material detection for safety confirmation before dredging operations ● For more details, please contact us or download the catalog.
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Company information
Yamato Exploration Technology Co., Ltd. has been striving to contribute to the development of society and ensure safety and security since its establishment on May 1, 1979, by accurately responding to our customers' diverse needs as a comprehensive geological consultant and construction consultant, utilizing geological surveys, physical exploration, and marine survey technologies. Thanks to this effort, we have accumulated a wealth of technical experience and know-how over the years. This is our treasure. With pride and responsibility as a group of professionals, we will continue to aim to be a company that contributes to the future of people and the Earth through technology, actively tackling new challenges. We sincerely appreciate your continued support. Our employees are always looking forward to your inquiries and consultations.