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    • 1. 发明申请
    • AN ASYNCHRONOUS OVERSAMPLING BEAMFORMER
    • 一种异步过采样波束形成器
    • WO0010638A2
    • 2000-03-02
    • PCT/TR9800019
    • 1998-08-24
    • BASKENT UNIVERSITYMUSTAFA KARAMANMUECAHIT KOZAK
    • MUSTAFA KARAMANMUECAHIT KOZAK
    • G01S7/52A61N
    • G01S7/52025G01S7/52028G01S7/52033G01S7/52063
    • The present invention provides a digital delay-and-sum receive beamformer with delta-sigma analog-to-digital (A/D) converters. The echoes' reflected are sensed by a transducer array. The signals received are sampled at the time instants required for the receive beamforming using the timing information stored in a memory and then digitized by DELTA SIGMA modulators prior to summation. This requires a non-uniform sampling scheme employing different clocks at each array channel. The non-uniform sampling is achieved by performing a logical "and" operation between a fixed master clock, which is slightly higher than the frequency at which the samples of beam sums are acquired, and a digital receive beamforming memory, which holds a "1" or a "0" for that analog sample associated with the master clock rate. The oversampled outputs, are then summed together. The coarse beam sum is further processed through a decimation filter to suppress high-frequency quantization noise.
    • 本发明提供了一种具有德耳塔西格玛模拟 - 数字(A / D)转换器的数字延迟和求和接收波束形成器。 所反映的回声由换能器阵列感测。 接收的信号在接收波束形成所需的时刻采用存储在存储器中的定时信息进行采样,然后在求和之前由ΔΣ调制器数字化。 这需要在每个阵列通道采用不同时钟的非均匀采样方案。 非均匀采样是通过在固定主时钟和数字接收波束成形存储器之间执行逻辑“与”操作来实现的,该固定主时钟比采集波束和采样的频率略高,该数字接收波束成形存储器保持“1 “或与主时钟速率相关的模拟采样为”0“。 过采样输出,然后汇总在一起。 粗波束和通过抽选滤波器进一步处理以抑制高频量化噪声。
    • 2. 发明授权
    • Apparatus and method for phased subarray imaging
    • 用于相位子阵列成像的装置和方法
    • US07972271B2
    • 2011-07-05
    • US11709347
    • 2007-02-21
    • Jeremy JohnsonMustafa KaramanButrus T. Khuri-Yakub
    • Jeremy JohnsonMustafa KaramanButrus T. Khuri-Yakub
    • A61B8/14
    • A61B8/14G01S7/52046G01S15/8915G01S15/8927G01S15/8993
    • An invention for coherent array image formation and restoration is taught. The invention is applicable for both 2D and 3D imaging using either 1D or 2D arrays, respectively. A transducer array is subdivided into subarrays, each subarray having a number of adjacent array elements. All elements of each subarray transmit and receive in parallel. The signals received from each subarray are delayed and summed to form scan lines, or beams. The low-beam-rate beams formed from each subarray are upsampled and interpolated prior to forming high-beam-rate images. Depending on the subarray geometry, a subarray-dependent restoration filter is also applied to the subarray beams. The restored beams from each subarray are combined to form the final high-beam-rate image. The invention significantly reduces the front-end hardware complexity compared to conventional methods such as full phased array imaging with comparable image quality.
    • 教导了相干阵列图像形成和恢复的发明。 本发明分别适用于使用1D或2D阵列的2D和3D成像。 换能器阵列被细分为子阵列,每个子阵列具有多个相邻的阵列元件。 每个子阵列的所有元素并行传输和接收。 从每个子阵列接收的信号被延迟并相加以形成扫描线或光束。 在形成高光束速率图像之前,从每个子阵列形成的低光束速率光束被上采样和内插。 根据子阵列几何,子阵列依赖的恢复滤波器也被应用于子阵列波束。 来自每个子阵列的恢复的波束被组合以形成最终的高光束速率图像。 与常规方法相比,本发明显着降低了前端硬件复杂性,例如具有可比较图像质量的全相控阵列成像。
    • 3. 发明申请
    • Apparatus and method for phased subarray imaging
    • 用于相位子阵列成像的装置和方法
    • US20050101867A1
    • 2005-05-12
    • US10696592
    • 2003-10-28
    • Jeremy JohnsonMustafa KaramanButrus Khuri-Yakub
    • Jeremy JohnsonMustafa KaramanButrus Khuri-Yakub
    • A61B8/14G01S7/52G01S15/89
    • G01S15/8927A61B8/14G01S7/52046G01S15/8915G01S15/8993
    • An invention for coherent array image formation and restoration is taught. The invention is applicable for both 2D and 3D imaging using either ID or 2D arrays, respectively. A transducer array is subdivided into subarrays, each subarray having a number of adjacent array elements. All elements of each subarray transmit and receive in parallel. The signals received from each subarray are delayed and summed to form scan lines, or beams. The low-beam-rate beams formed from each subarray are upsampled and interpolated prior to forming high-beam-rate images. Depending on the subarray geometry, a subarray-dependent restoration filter is also applied to the subarray beams. The restored beams from each subarray are combined to form the final high-beam-rate image. The invention significantly reduces the front-end hardware complexity compared to conventional methods such as full phased array imaging with comparable image quality.
    • 教导了相干阵列图像形成和恢复的发明。 本发明分别适用于使用ID或2D阵列的2D和3D成像。 换能器阵列被细分为子阵列,每个子阵列具有多个相邻的阵列元件。 每个子阵列的所有元素并行传输和接收。 从每个子阵列接收的信号被延迟并相加以形成扫描线或光束。 在形成高光束速率图像之前,从每个子阵列形成的低光束速率光束被上采样和内插。 根据子阵列几何,子阵列依赖的恢复滤波器也被应用于子阵列波束。 来自每个子阵列的恢复的波束被组合以形成最终的高光束速率图像。 与常规方法相比,本发明显着降低了前端硬件复杂性,例如具有可比较图像质量的全相控阵列成像。
    • 8. 发明申请
    • Apparatus and method for phased subarray imaging
    • 用于相位子阵列成像的装置和方法
    • US20070208254A1
    • 2007-09-06
    • US11709347
    • 2007-02-21
    • Jeremy JohnsonMustafa KaramanButrus Khuri-Yakub
    • Jeremy JohnsonMustafa KaramanButrus Khuri-Yakub
    • A61B8/14
    • A61B8/14G01S7/52046G01S15/8915G01S15/8927G01S15/8993
    • An invention for coherent array image formation and restoration is taught. The invention is applicable for both 2D and 3D imaging using either 1D or 2D arrays, respectively. A transducer array is subdivided into subarrays, each subarray having a number of adjacent array elements. All elements of each subarray transmit and receive in parallel. The signals received from each subarray are delayed and summed to form scan lines, or beams. The low-beam-rate beams formed from each subarray are upsampled and interpolated prior to forming high-beam-rate images. Depending on the subarray geometry, a subarray-dependent restoration filter is also applied to the subarray beams. The restored beams from each subarray are combined to form the final high-beam-rate image. The invention significantly reduces the front-end hardware complexity compared to conventional methods such as full phased array imaging with comparable image quality.
    • 教导了相干阵列图像形成和恢复的发明。 本发明分别适用于使用1D或2D阵列的2D和3D成像。 换能器阵列被细分为子阵列,每个子阵列具有多个相邻的阵列元件。 每个子阵列的所有元素并行传输和接收。 从每个子阵列接收的信号被延迟并相加以形成扫描线或光束。 在形成高光束速率图像之前,从每个子阵列形成的低光束速率光束被上采样和内插。 根据子阵列几何,子阵列依赖的恢复滤波器也被应用于子阵列波束。 来自每个子阵列的恢复的波束被组合以形成最终的高光束速率图像。 与常规方法相比,本发明显着降低了前端硬件复杂性,例如具有可比较图像质量的全相控阵列成像。