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公开(公告)号：EP2488845A1
公开(公告)日：2012-08-22
申请号：EP10823679.5
申请日：2010-10-12
CPC分类号： G01V9/02 , G01M3/18 , G01S13/536 , G01S13/56 , G01S13/885 , G01S13/887 , G01S13/888 , Y02A90/344
摘要： The invention relates to a device and a method to determine whether a water leakage has occurred in ground by means of Doppler radar. The device comprises a radar emitting unit for emitting electromagnetic waves into the ground, a receiver unit for receiving signals reflected from a fluctuating water surface, a signal processing unit which band pass filters the received signal to obtain a signal that only comprises the Doppler shifted frequencies, creates a measure of the derivative of the reflected signal and, in a decision processor, compares this measure with a threshold value corresponding to the signal value of the background. If the measure of the derivative exceeds said threshold value a leakage is considered to have occurred.
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公开(公告)号：EP2488845B1
公开(公告)日：2018-12-12
申请号：EP10823679.5
申请日：2010-10-12
CPC分类号： G01V9/02 , G01M3/18 , G01S13/536 , G01S13/56 , G01S13/885 , G01S13/887 , G01S13/888 , Y02A90/344
摘要： The invention relates to a device and a method to determine whether a water leakage has occurred in ground by means of Doppler radar. The device comprises a radar emitting unit for emitting electromagnetic waves into the ground, a receiver unit for receiving signals reflected from a fluctuating water surface, a signal processing unit which band pass filters the received signal to obtain a signal that only comprises the Doppler shifted frequencies, creates a measure of the derivative of the reflected signal and, in a decision processor, compares this measure with a threshold value corresponding to the signal value of the background. If the measure of the derivative exceeds said threshold value a leakage is considered to have occurred.
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