利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

3 条记录 (耗时 0.012 秒)

    IMPROVED METHOD AND DEVICE FOR LOCAL SPECTRAL ANALYSIS OF AN ULTRASONIC SIGNAL
    1.
    发明公开
    IMPROVED METHOD AND DEVICE FOR LOCAL SPECTRAL ANALYSIS OF AN ULTRASONIC SIGNAL 有权
    FOR超声信号的频谱局部改进的方法和装置

    公开(公告)号：EP1671156A1

    公开(公告)日：2006-06-21

    申请号：EP04791882.6

    申请日：2004-10-05

    申请人： Actis Active Sensors S.r.l. ,  Esaote S.p.A.

    发明人： MASOTTI, Leonardo ,  BIAGI, Elena ,  GRANCHI, Simona ,  BRESCHI, Luca

    IPC分类号： G01S15/89 ,  G01S7/52

    CPC分类号： G01S7/52036 ,  G01S15/8977

    摘要： The method decomposes the radio frequency signal into sub-bands by filtering, for example with a time-frequency transform. From the coefficients acquired through decomposition a matrix of spectral coefficients is obtained, from which local estimators are obtained, constituted in particular by the coefficients of the interpolating polynomials. The statistical distribution of the local estimators is evaluated in windows overlaid on the ultrasound frame. The conformation of the distribution histograms of the spectral coefficients provides a parameter which, combined with the local estimators, provides weighted local estimators, which contain spectral information useful in the identification of specific structures in the organ subjected to ultrasound analysis.

    METHOD AND DEVICE FOR DETECTING A TRANSPARENT OR SEMI-TRANSPARENT MATERIAL APPLIED ONTO AN ABSORBENT AND/OR SCATTERING MATERIAL
    3.
    发明公开
    METHOD AND DEVICE FOR DETECTING A TRANSPARENT OR SEMI-TRANSPARENT MATERIAL APPLIED ONTO AN ABSORBENT AND/OR SCATTERING MATERIAL 审中-公开
    的方法和设备中，用于对吸收和/或扩频检测材料应用材料的透明或半透明

    公开(公告)号：EP2777027A1

    公开(公告)日：2014-09-17

    申请号：EP12784724.2

    申请日：2012-10-03

    申请人： Actis Active Sensors S.r.l. ,  Biagi, Elena

    发明人： BIAGI, Elena ,  MASOTTI, Leonardo ,  VANNACCI, Enrico ,  FROSINI, Stefano ,  CALZOLAI, Marco

    IPC分类号： G07D7/12

    CPC分类号： G07D7/121

    摘要： A method is described, for detecting the presence of a foreign first material (N) randomly applied on an object (BA) under examination formed by a second material, wherein the foreign first material (N) is transparent or semi-transparent and the second material is absorbent and/or scattering at at least one wavelength of an optical radiation. The method provides for lighting a first area (Zl) of the object (BA) by means of at least one optical source (1). The method also provides for framing a second area (Z2) of the object (BA) by means of an optical receiver (3). The optical receiver (3) and the optical source (1) are designed and arranged so that the first area (Zl), lighted by the optical source (1), is different from the second area (Z2) framed by the optical receiver (3). The presence of the foreign first material (N) on a surface of the object (BA) is detected through a change in the optical signal on the optical receiver (3) due to optical radiation emitted by the optical source (1) and conveyed through the foreign first material (N) from the first area (Zl) up until the second area (Z2).