Application of Spectrum-Subtracted sub-Band Singular Spectrum Entropy in sediment thickness measurement

作者：Fan Di^*; Wei Lu; Cao Maoyong

来源：Open Electrical and Electronic Engineering Journal, 2014, 8(1): 278-285.

DOI：10.2174/1874129001408010278

• Head location
• Head position
• High-accuracy
• Noise immunity
• Sediment layers
• Sediment thickness
• Singular spectrum entropy
• Time-differences

<jats:p>Obtaining the wave head location and acoustic time difference with high accuracy in measuring sediment
thickness in borehole by ultrasonic is a key and hard problem. The methods available now can’t meet the precision and
noise immunity requirement. This paper utilizes the good performance of Spectrum-Subtracted sub-Band Singular Spectrum
Entropy (SSB-SSE) to process the echoes reflected from the sediment and get their wave head positions. Based on
these obtained data, acoustic time difference can be calculated, then the sediment thickness can be achieved. The results of
three typical experiments show that SSB-SSE is very suitable in locating the wave heads of thicker sediment layer’s echoes,
and it also performs well even when the echo is covered by noise.</jats:p>

• 出版日期2014--