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    • 3. 发明申请
    • Fully Digitally Controller for Cantilever-Based Instruments
    • 基于悬臂的仪器的全数字控制器
    • US20150113687A1
    • 2015-04-23
    • US14590150
    • 2015-01-06
    • OXFORD INSTRUMENTS PLCOXFORD INSTRUMENTS AFM INC.
    • Roger ProkschJason ClevelandDan BocekTodd DayMario VianiClint Callahan
    • G01Q10/00G01Q60/24
    • G01Q10/06B82Y35/00G01Q10/00G01Q30/04G01Q60/24
    • A controller for cantilever-based instruments, including atomic force microscopes, molecular force probe instruments, high-resolution profilometers and chemical or biological sensing probes. The controller samples the output of the photo-detector commonly used to detect cantilever deflection in these instruments with a very fast analog/digital converter (ADC). The resulting digitized representation of the output signal is then processed with field programmable gate arrays and digital signal processors without making use of analog electronics. Analog signal processing is inherently noisy while digital calculations are inherently “perfect” in that they do not add any random noise to the measured signal. Processing by field programmable gate arrays and digital signal processors maximizes the flexibility of the controller because it can be varied through programming means, without modification of the controller hardware.
    • 用于基于悬臂的仪器的控制器,包括原子力显微镜,分子力探针仪器,高分辨率轮廓仪和化学或生物传感探针。 控制器采用非常快速的模拟/数字转换器(ADC)对通常用于检测这些仪器中的悬臂偏转的光检测器的输出进行采样。 然后,利用现场可编程门阵列和数字信号处理器对输出信号产生的数字化表示进行处理,而不利用模拟电子装置。 模拟信号处理本质上是嘈杂的,而数字计算本质上是“完美的”,因为它们不会对测量的信号增加任何随机噪声。 通过现场可编程门阵列和数字信号处理器的处理可以最大限度地提高控制器的灵活性,因为它可以通过编程手段进行变化,而无需修改控制器硬件。