Device for detecting change in underground medium
First Claim
1. A medium change detection device comprising:
- an ultrasonic/wireless transmission device disposed under an underground target and configured to transmit an ultrasonic signal and a radio frequency (RF) signal toward a surface of earth; and
at least one ultrasonic/wireless reception device disposed on a surface of earth over the underground target and configured to receive the ultrasonic signal and the RF signal transmitted from the ultrasonic/wireless transmission device,wherein the medium change detection device uses the RF signal as a triggering signal and measures an arrival time of the ultrasonic signal received by the ultrasonic/wireless reception device to detect a size of an underground soil component on a reception path of the ultrasonic signal based on a size of a sound speed that varies depending on a component of a medium on the reception path.
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Accused Products
Abstract
The inventive concept relates to a device that detects a leak of a liquid leaked from a sinkhole, water pipe or oil pipeline under the ground. In the detection device of the inventive concept, a plurality of reception devices disposed on the surface of the earth simultaneously receive an ultrasonic signal transmitted from a transmission device under the ground and a radio frequency (RF) signal synchronized with the ultrasonic signal. Also, by measuring an arrival time of the ultrasonic signal by using the wireless signal received by each reception device as a triggering signal, a leak range of a liquid leaked from a sinkhole, water pipe or oil pipeline on a signal path between the transmission device and the reception device is detected.
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Citations
14 Claims
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1. A medium change detection device comprising:
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an ultrasonic/wireless transmission device disposed under an underground target and configured to transmit an ultrasonic signal and a radio frequency (RF) signal toward a surface of earth; and at least one ultrasonic/wireless reception device disposed on a surface of earth over the underground target and configured to receive the ultrasonic signal and the RF signal transmitted from the ultrasonic/wireless transmission device, wherein the medium change detection device uses the RF signal as a triggering signal and measures an arrival time of the ultrasonic signal received by the ultrasonic/wireless reception device to detect a size of an underground soil component on a reception path of the ultrasonic signal based on a size of a sound speed that varies depending on a component of a medium on the reception path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification